| 单词 | trilobite |
| 例句 | “Nice little trilobite, that. Bit of worm damage on this side. But not too bad.” Black Swan Green 2006-04-10T00:00:00Z By 500 million years ago there were vast herds of trilobites, beautifully constructed animals, a little like large insects; some hunted in packs on the ocean floor. Cosmos 1980-01-01T00:00:00Z But there are no trilobites alive today; there have been none for 200 million years. Cosmos 1980-01-01T00:00:00Z Even more awkwardly anomalous was another species of trilobite found in Europe and the Pacific Northwest but nowhere in between, which would have required not so much a land bridge as a flyover. A Short History of Nearly Everything 2003-05-06T00:00:00Z One species of trilobite that was well known in Europe was also found to have lived on Newfoundland–but only on one side. A Short History of Nearly Everything 2003-05-06T00:00:00Z I was hefting a trilobite fossil and half listening. The Evolution of Calpurnia Tate 2009-05-12T00:00:00Z Like trilobites, they are arthropods, “animals with jointed legs and all the muscles and tendons tucked inside an exoskeleton.” Books of The Times: ?Horseshoe Crabs and Velvet Worms,? by Richard Fortey 2012-04-12T19:42:43Z But it’s those big trilobites, such as Isotelus, Ohio’s state fossil, that keep Johnson digging every day in two 11-acre lots. Ohio man has knack for finding rare fossils 2014-06-29T04:00:00Z For a trilobite hunter, finding an Isotelus is like unearthing a Tyrannosaurus rex, Johnson said. Ohio man has knack for finding rare fossils 2014-06-29T04:00:00Z He said an elementary schoolteacher in Michigan introduced him to trilobites. Ohio man has knack for finding rare fossils 2014-06-29T04:00:00Z It also cautions against any species’ assumed superiority: When the trilobite elders first see Hai, they lock him in a cage. Can Puppets Save the World From Extinction? 2020-02-10T05:00:00Z He brought me tiny, perfect offerings: a trilobite here, a sourdough starter there. How a Missing Sock Changed My Life 2021-10-15T04:00:00Z “Those are trilobite tracks,” Johnson said, pointing to faint lines on one rock. Ohio man has knack for finding rare fossils 2014-06-29T04:00:00Z A pair of iron pliers is embedded within a flat slab of smelted iron, like a trilobite in rock. The clever conceptual riddles of Tatsuo Kawaguchi 2017-06-24T04:00:00Z In addition to geodes, they amassed fossils of trilobites, ferns and fishes, as well as an authentic poison blow gun from the Amazon that includes a piranha jaw to sharpen the darts. You May Be Surprised to Hear That Restoration Hardware Is Doing Great 2018-09-19T04:00:00Z Directed by Lee Sunday Evans and produced by CollaborationTown and Flint Repertory Theater, “Riddle” dances around — sometimes literally — the ultimate fate of Aphra and her fellow trilobites. Can Puppets Save the World From Extinction? 2020-02-10T05:00:00Z “Who wants to be vulnerable, really?” she asks during a monologue about, of all things, trilobites. Dance Review: ‘Vestigal,’ by the Wendy Osserman Dance Company 2014-04-01T22:40:01Z Some 465 million years ago, an armored pill-bug-like creature called a trilobite scuttled across an ancient seafloor and apparently scarfed up anything it could, according to a new analysis of its exceptionally preserved gut contents. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z The final meal of this animal—a trilobite—still sat in its guts as sediment buried its body in the sea floor of an ancient Paleozoic sea. Scientists reveal half-billion-year-old ‘last supper’ 2023-09-27T04:00:00Z You can find trilobites near the Idaho border, primitive horses on the Columbia Plateau, exquisite flowers in Republic, giant bird tracks near Bellingham and curious bearlike beasts on the Olympic Peninsula. Want to dig up some cool fossils? You could start right in our WA backyard. 2023-09-15T04:00:00Z But it appears to have also been capable of hunting relatively big game: One Burgessomedusa specimen studied in the paper was preserved with a trilobite lodged inside its bell. 505-Million-Year-Old Jellyfish Fossils May Be the Oldest Ever Found 2023-08-01T04:00:00Z The fossilized trilobite resembles a footprint, with a rounded front end and ridges extending across the body. Fundamentals of Biology 2015-01-01T00:00:00Z But one major aspect of trilobites’ ecology that had long eluded researchers was their diet. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z A private collector first discovered the trilobite fossil more than a century ago—or at least the small sphere of ancient sediment that contained it. Scientists reveal half-billion-year-old ‘last supper’ 2023-09-27T04:00:00Z In addition to sponges and worms were trilobites, arthropods sporting grasping appendages and a six-legged animal that looked remarkably similar to a primitive insect that did not appear until millions of years later. 462-Million-Year-Old Fossil Trove Holds Miniature World of Marine Creatures 2023-05-10T04:00:00Z It was at this time, for example, that the trilobites, a group that survived the Ordovician–Silurian extinction, became extinct. Biology for AP Courses 2022-06-09T00:00:00Z Some of the dominant phyla in the world’s oceans, such as the trilobites, disappeared completely. Fundamentals of Biology 2015-01-01T00:00:00Z Even the best-preserved trilobite fossils, which possess the ghostly imprint of a fossilized digestive tract, revealed frustratingly little about these critters’ menu. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z That’s when Kraft and Vaškaninová spotted the final meal, revealed by tiny, fossilized shells of the animals the trilobite munched on. Scientists reveal half-billion-year-old ‘last supper’ 2023-09-27T04:00:00Z All the site’s trilobites are also juveniles, suggesting that this could have been a nursery. 462-Million-Year-Old Fossil Trove Holds Miniature World of Marine Creatures 2023-05-10T04:00:00Z The trilobites were the first animals to conquer land. Biology for AP Courses 2022-06-09T00:00:00Z I spent roughly an hour meandering through the preserve looking for remnants of the first known species of coral, as well as trilobites and cephalopods, which felt like just the right amount of time. Vermont’s Lake Champlain Islands offer a sweet, summery slice of mellow 2022-07-28T04:00:00Z The trilobite specimen hails from a well-known fossil deposit near Prague. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z Scientists have debated whether trilobites were mostly predators or scavengers, Hopkins says. Scientists reveal half-billion-year-old ‘last supper’ 2023-09-27T04:00:00Z Most well-known types of organisms were decimated by this event, but only a few became completely extinct, including trilobites. Physical Geology 2015-01-01T00:00:00Z Many famous organisms, like sea scorpions and trilobites, were never seen again in the fossil record. An Introduction to Geology 2017-01-01T00:00:00Z Yet despite their abundance, nobody has been able to figure out how trilobites reproduced—until now. Sex Life of One of Earth’s Earliest Animals Exposed 2022-06-03T04:00:00Z When a local fossil hunter cracked into one of these nodules in 1908, they discovered the nearly intact trilobite entombed inside. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z The scientists also found that karma caught up with the trilobite: Fossilized tunnel structures surrounding the animal suggest other scavengers most likely attempted to eat its dead body. Scientists reveal half-billion-year-old ‘last supper’ 2023-09-27T04:00:00Z The team examined several spiny Olenoides serratus trilobites collected from the Cambrian site. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z There, old wounds on trilobite shells abound, and fossil excrements, likely produced by trilobites, contain yet more trilobite shells. Trilobite Fossils Suggest Cannibalism Is More Ancient Than Once Thought 2022-03-25T04:00:00Z All that changed when Losso and her colleagues took a closer look at a 508-million-year-old trilobite fossil from the famous Burgess Shale deposit in British Columbia. Sex Life of One of Earth’s Earliest Animals Exposed 2022-06-03T04:00:00Z The stunning find ended up at a local museum, where paleontologist Petr Kraft came across the trilobite as a child and noticed something crammed inside it. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z Although the guts themselves were not preserved in the fossil, their contents reveal important information about the physiology of the trilobite. Scientists reveal half-billion-year-old ‘last supper’ 2023-09-27T04:00:00Z The sturdy, calcite-infused exoskeletons of trilobites and their segmented shells are nearly ubiquitous in fossil deposits from the Cambrian Period to the Permian. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z As such, scientists seeking proof that life once existed on Mars are not going to seek out the same things as someone trying to find trilobite fossils. A bizarre Martian rock looks just like coral 2022-03-04T05:00:00Z “In fact, there were certain trilobite species that basically look exactly like a horseshoe crab,” says Bicknell, who was not involved in the study. Sex Life of One of Earth’s Earliest Animals Exposed 2022-06-03T04:00:00Z Kraft, now a researcher at Charles University in Prague and lead author of the new study, spent decades wondering what was inside the trilobite. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z When T. rex stalked its prey, every trilobite that ever fossilized was already in the ground. A Reverse Journey through Geologic Time, a Tale of Wild Horses and Interspecies Kinship, and More 2022-02-28T05:00:00Z But this trove of trilobite fossils has revealed frustratingly little when it comes to how the Paleozoic animals reproduced across 250 million years of living on ancient Earth. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z Similar fecal pellets have been found much deeper in the fossil record, including the heads of trilobites more than 450 million year old. Why Did a Fish Have Fossilized Feces Where Its Brain Once Was? 2022-02-04T05:00:00Z Claspers suggest that, in some species, male and female trilobites had different looking bodies. Sex Life of One of Earth’s Earliest Animals Exposed 2022-06-03T04:00:00Z This allowed the researchers to not only look through the trilobite’s shell but also differentiate the contents inside. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z Hundreds of millions of years ago, trilobites filled the ancient seas. They Put the Bite in Trilobite 2021-01-30T05:00:00Z A recently re-examined fossil from the Burgess Shale is pulling back the shroud of mystery over the ancient arthropods’ sex lives, and revealing that some trilobites most likely sported a loving grip. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z KU owns thousands of fossil specimens, especially trilobites, cephalopods and ancient clams. App helps Kansas fossil hunters search for prehistoric life 2020-03-06T05:00:00Z Nevertheless, the study marks an important milestone in trilobite paleontology, one which will help inform future research. Sex Life of One of Earth’s Earliest Animals Exposed 2022-06-03T04:00:00Z The 3-D scans revealed a bevy of shell fragments lodged in each of the trilobite’s two stomachs. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z The first, Redlichia rex, was one of the largest known trilobites of the Cambrian Period — Frisbee-size in a world of tea saucers. They Put the Bite in Trilobite 2021-01-30T05:00:00Z The fragmented nature of the specimen was a lucky break because it revealed the anatomy often hidden under a trilobite’s shell. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z A single-file line of traveling trilobites, all facing the same direction, were caught in a sediment avalanche 480 million years ago. In Case You Missed It 2020-01-04T05:00:00Z Even extinct species such as trilobites and dinosaurs sported elaborate projections. The Weapons of Sexual Rivalry 2019-12-24T05:00:00Z The varied spread of seafood in the trilobite’s guts led the scientists to conclude that B. incola was an opportunistic scavenger that trawled the seafloor for carcasses and anything slow enough for it to catch. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z But because certain information — such as a trilobite’s muscle positions or the material properties of its exoskeleton — is unknown and must be approximated, she said, exact measurements and firm conclusions are impossible. They Put the Bite in Trilobite 2021-01-30T05:00:00Z But two appendages along the trilobite’s midsection had a noticeably warped anatomy. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z These trilobites lived during the Great Ordovician Biodiversification Event, a period defined by a dramatic increase in the variety and complexity of marine life. Trilobite Fossils Show Conga Line Frozen for 480 Million Years 2019-10-17T04:00:00Z A study published Thursday in the journal Scientific Reports describes groups of blind trilobites, known as Ampyx, all facing in the same direction, apparently maintaining contact via their long rearward spines. Queuing for eternity: Fossils show lining up is primal urge 2019-10-17T04:00:00Z The remains inside the trilobite’s stomachs largely aligned with what the scientists expected to find, but they were surprised by the ancient arthropod’s healthy appetite. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z If the lines were the result of random currents, there would probably be a wider variety of ages, and some of the trilobites would likely be facing backward. 480-million-year-old trilobite ‘traffic jams’ may reveal ancient migratory behavior 2019-10-17T04:00:00Z When the trilobite was standing on its other legs, these modified appendages would not have reached the seafloor. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z The exceptional preservation of the fossils implies that the trilobites died suddenly when they were buried by sediment, perhaps during a storm, rather than being gradually transported to their resting place by currents. Trilobite Fossils Show Conga Line Frozen for 480 Million Years 2019-10-17T04:00:00Z Invertebrate groups that experienced diversification included horseshoe crab-like trilobites, clams, clam-like brachiopods and a group called gastropods that included snails and slugs. Distant asteroid calamity shaped life on Earth 466 million years ago 2019-09-18T04:00:00Z The team speculates that the trilobite may have been molting, which could explain the feeding frenzy. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z Reefs built by microbes gave way to some of the first coral reefs, trilobites grew larger, and tentacled predators such as nautiloids diversified and swarmed the mostly fishless seas. Veil of dust from ancient asteroid breakup may have cooled Earth 2019-09-18T04:00:00Z Because female trilobites also probably practiced external fertilization, emitting their eggs into the swirling tide for males to fertilize, the Olenoides trilobites may have used clasping appendages in the same way. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z The researchers also didn’t find any evidence of burrows in the sediment that might account for the linear pattern of these particular trilobites. Trilobite Fossils Show Conga Line Frozen for 480 Million Years 2019-10-17T04:00:00Z She is studying the extinct marine arthropods, trilobites. NY science teachers say fossil field trip will boost lessons 2019-08-04T04:00:00Z Like living crustaceans, trilobites shed their shell as they grew. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z A little higher up still, familiar fossil creatures such as trilobites appear. The Rise of the First Animals 2019-06-01T04:00:00Z Instead of being near the head in the contemporary species, the modified legs are along the trilobite’s midsection, which places them in the perfect spot to latch onto the female’s spiny backside. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z Whatever the precise explanation of this behavior, the trilobite fossils offer a tantalizing glimpse into the early days of coordinated teamwork in animals. Trilobite Fossils Show Conga Line Frozen for 480 Million Years 2019-10-17T04:00:00Z He started volunteering at the local museum in Ludlow in the summer, where he met people who were expert in the things he cared most about, such as where to find trilobites. The Anthropocene epoch: have we entered a new phase of planetary history? 2019-05-30T04:00:00Z The team described a crack along the top of the trilobite’s shell that may indicate it was starting to molt when it was buried. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z Horizons opened, and I settled on bestowing on him a 380-million-year-old former denizen of China: a fossil trilobite. Understanding through Time: Early Life, Climate and Vaccines 2019-05-14T04:00:00Z Ms. Losso agrees that diverse species of trilobites probably used a variety of reproductive approaches beyond clasping. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z Black fiddlers are the trilobites of American musical history. Rhiannon Giddens and What Folk Music Means 2019-05-13T04:00:00Z To pass the time, residents, as they were called, would go out in the desert to look for arrowheads, trilobites and little amber topaz crystals. Opinion | I Know What Incarceration Does to Families. It Happened to Mine. 2018-07-13T04:00:00Z Because these animals are only distantly related to trilobites, Ahlberg thinks that a neutral gut may be an ancestral condition across arthropods. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z As for the armor and eyes, they belonged to trilobites—vaguely technological sea bugs that thrived in the ocean for almost three hundred million years. Glimpses of a Mass Extinction in Modern-Day Western New York 2018-07-04T04:00:00Z Many trilobites lack the spines of Olenoides, making them difficult to grasp. Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z "India has some of the world's greatest paleontological resources," says Nigel Hughes, a paleobiologist at the University of California, Riverside, whose findings in the Himalayas have illuminated trilobite evolution. India’s paleontologists fight destruction of its fossil riches 2018-04-04T04:00:00Z Dear NYT: every time, and that's a lot of times, I see a headline with the "Trilobites" tag, I think it's for an article about trilobites. You Get Thirsty and Drink. How Does Your Brain Signal You’ve Had Enough? 2018-02-28T05:00:00Z Though the trilobite’s stomach may not have been particularly acidic, it still appears to have had a noxious gut. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z Scientists made the find while looking at the well-preserved trilobite fossil. Researchers find 'oldest ever eye' 2017-12-07T05:00:00Z “Only a few million years after the first trilobites, they’ve already developed this unexpectedly complex behavior.” Before There Were Birds or Bees, This Is How Trilobites Made Babies 2022-05-06T04:00:00Z “Sorry for the mess,” I said as I moved a pile of petrified trilobites. Perspective | The worm turns: The chilling ‘truth’ of Metro’s recent shutdowns 2017-12-03T05:00:00Z The next oldest representative is a single juvenile trilobite from Sweden. Trilobites Had Guts 2017-10-28T04:00:00Z The researchers found areas in the fossil where scavengers had burrowed into the trilobite in search of soft tissue. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z The team also revealed that only a few million years later, improved compound eyes with higher resolution developed in another trilobite species from the present-day Baltic region. Researchers find 'oldest ever eye' 2017-12-07T05:00:00Z The big one – more than 95% of species perished, including trilobites and giant insects – strongly linked to massive volcanic eruptions in Siberia that caused a savage episode of global warming. Earth's sixth mass extinction event already under way, scientists warn 2017-07-10T04:00:00Z From above, Palm Jumeirah resembles a palm tree with spreading branches, or maybe a trilobite fossil. The World Is Running Out of Sand 2017-05-22T04:00:00Z The most obvious change is that the crop – basically the trilobite stomach – evolved much earlier than previously thought. Trilobites Had Guts 2017-10-28T04:00:00Z The scavengers steered clear of the trilobite’s gut, however, revealing that bubbling enzymatic activity may have continued even after the animal died. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z Ancient trilobites and other scattered specimens provide convincing evidence that animals lived 530 million years ago. Time is running out to determine if China holds the world’s oldest animal fossils 2017-05-05T04:00:00Z Those, they determined, are actually eggs—the first time anyone had observed fossil trilobite eggs right next to the critters themselves. Ancient trilobites may have released sperm and eggs from their heads 2017-02-23T05:00:00Z The discovery that extinct marine organisms called trilobites laid eggs provides the first direct evidence for how they reproduced. Palaeontology: Trilobites laid eggs : Nature : Nature Research 2017-01-17T05:00:00Z The discovery of exceptionally old trilobites with both systems changes what paleontologists expected. Trilobites Had Guts 2017-10-28T04:00:00Z Losso says the new findings add crucial ecological context to trilobites, which survived for a period of 270 million years and whose fossilized shells have been studied by researchers for centuries. Last Meal of 465-Million-Year-Old Trilobite Discovered 2023-09-28T04:00:00Z Behold the hyolith — a bizarre Cambrian-period creature that dwelt on the ocean floor alongside other armored invertebrates like trilobites more than 500 million years ago. Finding a Home on the Tree of Life for a Tentacled Ice Cream Cone With a Lid 2017-01-11T05:00:00Z The structures were exceptionally well preserved, the eggs and exoskeletons of the trilobites replaced with an iron sulfide ore called pyrite. Ancient trilobites may have released sperm and eggs from their heads 2017-02-23T05:00:00Z During a recent tour, he pointed out a baby trilobite - no bigger than a large grain of rice - next to a fossilized adult trilobite. Houston Museum of Natural Science guide makes it seem real 2017-01-09T05:00:00Z But the presence of both a crop and digestive glands, Hopkins and colleagues write, means that the evolution of trilobite innards was more complex than previously supposed. Trilobites Had Guts 2017-10-28T04:00:00Z And it’s still not clear what trilobite beetles eat. Bizarre-Looking Beetle Has an Even Weirder Sex Life They examined it along with nearly 80 other trilobite chains, the longest of which contained more than 19 individuals. Marching One by One, Trilobites Traversed the Seafloor 2016-09-09T04:00:00Z Now, a new study suggests that trilobites migrated across the ocean floor in long, orderly queues—just like many modern arthropods. What queues up better than the British? Trilobites! 2016-08-24T04:00:00Z Collecting trilobites was the perfect nerdy hobby for me when I was in high school: the sheer variety is pretty astonishing. Trilobites are the Legos of the Ordovician seas 2016-07-10T04:00:00Z Following millions of years of sediment buildup and compression, the meteorites fossilized, much like the trilobites and shellfish that shared the seafloor. New ‘Extinct’ Meteorite Hints at Violent Cosmic Collision 2016-06-16T04:00:00Z Female trilobite beetles keep their larval form throughout life, an unusual type of neoteny—or, retention of juvenile form—that may allow them to invest more energy into making big healthy babies. Bizarre-Looking Beetle Has an Even Weirder Sex Life Before long the world was full of trilobites and anemones, then fish, ferns, pterodactyls, tyrannosaurs, bees, whales, cacti, kangaroos, not to mention us. This gene helps prevent cancer. Did it also give rise to all complex life? 2016-04-26T04:00:00Z In the lab, Laurel Kroo, a mechanical-engineering student, was researching the compound eyes of fossilized trilobites, a group of extinct marine arthropods, in the hope of improving the Foldscope’s lens design. A Microscope to Save the World 2015-12-21T05:00:00Z Eyewitness to Evolution writes that "The eyes of trilobites are composed of elongate prisms of clear calcite," and that they were sophisticated in these early days of life. Trilobites are the Legos of the Ordovician seas 2016-07-10T04:00:00Z The diverse charts range in topic from trilobites and bioluminescent critters to blueprints of start-up costs and Ebola's entry into the immune system. Book Review: The Best American Infographics 2015 2015-10-23T04:00:00Z That’s right—all of the beetles that look like trilobites are females. Bizarre-Looking Beetle Has an Even Weirder Sex Life Other notable examples included a sea sponge named Spongiforma squarepantsii after a certain cartoon character, and a trilobite with the swashbuckling moniker Han solo. If at first you don’t succeed, tweet it 2015-09-10T04:00:00Z "Finding a trilobite fossil is a no-brainer, we all can understand that one, or a dinosaur bone." Mars Surface Glass Could Hold Ancient Fossils 2015-06-12T04:00:00Z It was the Ordovician era that provided the best trilobites. Trilobites are the Legos of the Ordovician seas 2016-07-10T04:00:00Z “That’s the evolutionary distance from the earliest trilobites to human beings,” said J. William Schopf, a paleontologist at the University of California, Los Angeles, and the lead author of the study. Unchanged for More Than Two Billion Years 2015-02-09T05:00:00Z And, strangest of all, it took nearly a century of searching to find a male trilobite beetle. Bizarre-Looking Beetle Has an Even Weirder Sex Life An estimated 95 per cent of species were lost including, most famously, the trilobites. How Extinctions Created The Dinosaurs 2014-09-08T04:00:00Z “They changed relatively little as they went through their molts,” he said, “so we’ve been able to assemble growth series, stage after stage, for a number of trilobite species.” Basics: When Trilobites Ruled the World 2014-03-03T22:50:21Z The shores of Lake Champlain yield fragmented Triarthrus pieces, and the first trilobite that I ever bought was a crumbling Flexicalymene. Trilobites are the Legos of the Ordovician seas 2016-07-10T04:00:00Z I paint trilobites with wings on them: I’d never survive if my audience was a small village. How Plagiarized Art Sells for Millions 2014-01-09T22:45:06.645Z The ensuing arms race led to hard body parts and shells for protection, such as the elaborate spikes and spires of trilobite shells. Oxygen Brought Earliest Carnivores to Life 2013-08-01T20:45:02.507Z Clamlike creatures called brachiopods and trilobites—those extinct cousins of today's lobsters and insects, with their hard exoskeletons, long antennae and compound eyes—reigned supreme. Tiny Plants That Once Ruled the Seas (preview) 2013-05-15T11:15:00.233Z Later still, with the rise of jawed fish and other fierce predators, trilobites evolved increasingly elaborate enrollment techniques, including tips and sockets that locked together and made the rounded trilobite almost impossible to pry apart. Basics: When Trilobites Ruled the World 2014-03-03T22:50:21Z Just under a century later, trilobites were formally identified as a group of animals, with research conducted regularly throughout the decades to follow. Trilobites are the Legos of the Ordovician seas 2016-07-10T04:00:00Z There we witness the watery ways of early life on the earth, when clamlike creatures and trilobites dominated the seas. Journeying to the Ancient Earth and the Quantum Realm 2013-05-14T17:45:00.383Z But from trilobites to passenger pigeons, countless numbers of species have disappeared, and lately some scientists have been cobbling together the genetic fragments necessary to try to resurrect a few. Around the World in Six Ideas 2013-05-06T08:45:00Z What they did not see in either trench were any trilobites, fascinating armored and calcite-lensed creatures that dominated Paleozoic oceans, and have long been thought extinct. What Lives at the Bottom of the Mariana Trench? More Than You Might Think 2013-04-15T00:15:05.547Z But fairly late in trilobite evolution one group developed a different sort of eye, composed of a smaller number of larger, separated calcite lenses. Basics: When Trilobites Ruled the World 2014-03-03T22:50:21Z Our fascination with trilobites goes back millennia with possible descriptions dating back to ancient times. Trilobites are the Legos of the Ordovician seas 2016-07-10T04:00:00Z Right now the apex of consumer robotics is that humble domestic trilobite, the Roomba. Open Sky: After Transforming War, Drone Use Takes Off on the Home Front 2013-01-31T13:05:24Z The fossil trilobites of this region identify it with the silver lead districts of Nevada, Utah, and Mexico. Scientific American, Vol. XLIII.?No. 1. [New Series.], July 3, 1880 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:30.823Z And somewhere, somehow, trilobites — or something even more fantastic — may still be awaiting the pop of flashbulbs and champagne bottles. What Lives at the Bottom of the Mariana Trench? More Than You Might Think 2013-04-15T00:15:05.547Z By contrast, the fossil record brims with trilobite PG-rated parts, the mineralized remains of the hard outer sheath, or exoskeleton, that covered much of the trilobite’s body. Basics: When Trilobites Ruled the World 2014-03-03T22:50:21Z His chief work was the description of the invertebrate fossils of New York—in which he dealt with the graptolites, brachiopods, mollusca, trilobites, echini and crinoids of the Palaeozoic formations. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z There was a time when the most comprehensive, the clearest consciousness on earth was that of the trilobite or the cephalopod. Morals and the Evolution of Man 2011-11-14T03:00:18.930Z In fact the Cambrian has sponges, primitive corals, a great variety of brachiopods, the beginnings of gastropods, a wonderful array of trilobites, and other lowly forms of arthropods. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z He did not find fame spending dusty days picking at shale in search of ancient trilobites. | Richard Dawkins: Richard Dawkins, an Original Thinker Who Bashes Orthodoxy 2011-09-19T17:34:05Z In most trilobites, each compound orb held hundreds of tiny calcite lenses, arranged in a tightknit honeycomb pattern, like the eye of a fly. Basics: When Trilobites Ruled the World 2014-03-03T22:50:21Z The brachiopods and trilobites have likewise been made use of for zonal purposes among the oldest sedimentary formations. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z As regards rank in the zoological scale, certain molluscan remains are the highest, but outclassing them in size, abundance, and degree of specialization are the trilobites, the nearest living representatives of which are certain crustaceans. North America 2011-05-05T02:00:20.027Z First abundance of marine animals and dominance of trilobites. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z It abounds in beautiful masses of coral, shells, and trilobites. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z Very early appear certain creatures rather like plant-lice, crawling creatures which could roll themselves up into balls as the plant-lice do, the trilobites. A Short History of the World 2011-03-04T03:01:03.147Z We speak of the Cretaceous, Jurassic, and Cambrian periods, and of the Cretaceous fauna, the Jurassic flora, the Cambrian trilobites, as if these adjectives denoted simply epochs of geological time. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Of the trilobites about 100 species have been discovered in the Cambrian rocks of North America, the largest individual being about 20 inches in length. North America 2011-05-05T02:00:20.027Z It was the end for ammonites and trilobites. Is Coal Fly Ash Responsible for Mass Extinction? 2011-01-23T18:15:00.263Z About half of the animal groups found at Stanley Glacier, such as trilobites, are found at other Burgess sites in different abundances. Primordial Bestiary Gets an Annex 2010-08-31T14:31:00Z That's like asking a trilobite to speculate on the lifestyles of humans. Alien life ? but not as we know it 2010-08-24T10:00:00Z The lowest fossiliferous horizon in the Cambrian rocks of Europe and North America is known as the Olenellus zone, from the prominence in it of that genus of trilobite. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z The Moroccan fossils include sponges, worms, trilobites and mollusks like clams, snails and relatives of the living nautilus. Fossil Trove Shows Diverse Creatures of Cambrian Did Not Disappear 2010-05-17T21:58:00Z Shelly creatures such as trilobites and brachiopods, of whose ancestors there is little sign in the rocks, are suddenly everywhere. Palaeontology: Do the locomotion 2010-03-04T11:17:00Z I hold in my hand a fossil trilobite of normal proportions. The Glaciers of the Alps Being a narrative of excursions and ascents, etc. They contain trilobites of many species, and other marine fossils. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis Thus, then, it seems that we have in the trilobites the representatives of the lower phases of the Arachnidan pedigree. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 "Apollodorus" to "Aral" In the articulata we have the crustaceans represented by more than 200 species of trilobites, besides other genera of the same class. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology Yet if that is the right interpretation, it leaves the question of what evolved into the trilobites and their kind as mysterious as ever. Palaeontology: Do the locomotion 2010-03-04T11:17:00Z The eyes of the trilobite of the old Silurian rocks are fitted for the same conditions with respect to light with those of existing animals of the same class. The Origin of the World According to Revelation and Science In the Cambrian period trilobites had already attained their maximum size; some species of Paradoxides were nearly 2 ft. long, but in company with these monsters were tiny forms like Agnostus and Microdiscus. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" No such abundance of these creatures exists to-day as existed when the trilobites thronged the shallows. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place Once he stretched his hand out toward a trilobite that seemed to be crawling up to his feet—and he felt the coarse surface of the shell before he pulled his hand back again. The Golden Amazons of Venus A great calamity is as old as the trilobites an hour after it has happened. Crestlands A Centennial Story of Cane Ridge The trilobites had already begun to decline in importance, and as happens not infrequently with degenerating races of beasts and men, they began to develop strange eccentricities of ornamentation in some of their genera. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 "Destructors" to "Diameter" Cambrian Stratigraphy.—Wherever the Cambrian strata have been carefully studied it has now been found possible and convenient to arrange them into three series, each of which is characterized by a distinctive genus of trilobite. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" We call it the Age of Invertebrates, because these soft-bodied, hard-shelled animals, the crinoids, the molluscs, and the trilobites, with bony external skeletons and no backbones, were the most abundant. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place They had an interesting habit of curling up nose to tail before they died, and, as a result, a large proportion of all the trilobite fossils we find are curled in this peculiar manner. The Meaning of Evolution Were the trilobites of the Silurian system,—at one period, as their remains testify, more than equally abundant,—creatures of similar habits? The Cruise of the Betsey or, A Summer Ramble Among the Fossiliferous Deposits of the Hebrides. With Rambles of a Geologist or, Ten Thousand Miles Over the Fossiliferous Deposits of Scotland Other brachiopods, corals and trilobites are present, and are similar to those found in the Wenlock limestone. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" Many of the Cambrian trilobites appear to have been blind, and they had not at this period developed that flexibility in the carapace that some forms acquired later. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" One of the most abundant fossil animals in ancient rocks is called a trilobite. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place This structure gives to these creatures the name of trilobites. The Meaning of Evolution Whole mountains are sometimes found to consist of a single species of fossil goniatites, trilobites, or nummulites. The World's Greatest Books — Volume 15 — Science As the trilobites lay in the mud, the jaws of a gigantic vice appear to have closed upon them and squeezed them into the shapes you see. Fragments of science, V. 1-2 The trilobites, as he so well dubbed them, ah in control again. Aladdin & Co. A Romance of Yankee Magic These remarkable, extinct trilobites were the first crustaceans. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place The trilobites, a quite highly organized order of crustacea, appear in the strata of the silurian epoch almost suddenly, in very many and very distinctly marked species. The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality Perhaps we are the trilobites of a new Silurian period; well, trilobites were painfully common, but we need not be. The Master-Knot of Human Fate Compare this fossil trilobite of normal proportions with these others which have suffered distortion. Fragments of science, V. 1-2 I’m working with some of the trilobites here to form a pool, and offer the company grounds for additional yards and a roundhouse and shops. Aladdin & Co. A Romance of Yankee Magic The trilobites throve, and, dying, left their record in the rocks; then disappeared entirely. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place Other groups which once played a great r�le, are now wholly extinct; for instance, the trilobites of the primary, the sauria of the secondary, the nummulites of the tertiary periods. The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality From the fact that the trilobites, so highly organized, appeared in the "primordial," or "oldest" strata, it would seem that they were specially adapted to make progress. Evolution An Investigation and a Critique He said as one night when he was there he was most dumbfounded to see how little attention she paid with Rufus discoursin' on trilobites 'n their relations to the cursory strata. Susan Clegg and Her Neighbors' Affairs Instead of the rudimentary trilobites, I perceived the remains of a more perfect order. A Journey to the Centre of the Earth They conquered the giant straight-horns and trilobites, former rulers of the seas. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place But while Daisy ate, she looked at the trilobite. Melbourne House We do not know that in all those "millions of years" a single higher form was evolved from any one of the great multitude of species of trilobites. Evolution An Investigation and a Critique He said he felt a sadness because every trilobite as was related by Rufus was of profound value to any scientific student. Susan Clegg and Her Neighbors' Affairs The veritable giants of the Cambrian world were the crustaceans, and especially the trilobites, which, nevertheless, hardly exceeded in size a good big modern lobster. Falling in Love With Other Essays on More Exact Branches of Science Many creatures, such as the trilobites, die out, and many other forms such as the crinoids or sea lilies become fewer in kind and of less importance. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky Perhaps Daisy's fears were needless; but, after the affair of her Egyptian spoon, she looked with jealous eyes not only on her Bible, but on her trilobite. Melbourne House As Darwin says of the goose, so one may say of the trilobite; it "had a singularly inflexible organization." Evolution An Investigation and a Critique Whereupon the lady drew herself up and remarked in the clipped accent of a parrot: "No, sir; it's a carboniferous trilobite of the Upper Silurian." Ma Pettengill Perhaps Daisy's fears were needless; but after the affair of her Egyptian spoon she looked with jealous eves not only on her Bible, but on her trilobite. Melbourne House, Volume 2 The trilobites are gone, and of the crinoids only a remnant is left. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky The Captain laughed a little and went off; thinking, however, not so much of his trilobites as of the sweet fearless look the little face had given him. Melbourne House But while Daisy eat, she looked at the trilobite. Melbourne House, Volume 1 That there," she glibly rattled off, "is the organic remains of a three-toed woolly bronsolumphicus of the carboniferous limestone, or Upper Silurian trilobite period. Ma Pettengill The trilobite, of which fifty species existed during the earlier formations, was extirpated before the secondary had commenced, and appeared no more. Vestiges of the Natural History of Creation To begin with, Professor Agassiz gives us lectures on zoölogy, geology, and all other ologies, and draws pictures on the blackboard of trilobites and different fossils, which is very amusing. In the Courts of Memory, 1858 1875; from Contemporary Letters These were a clear amelioration of trilobite and saurus, and a good basis for further proceeding. Representative Men "Sea weeds and trilobites—what a strange time!" said Daisy. Melbourne House, Volume 1 Much less can one picture to one's self what his ancestor was like in the age of the invertebrates, amid the trilobites, etc., of the earlier Palaeozoic seas. Time and Change Many slabs of it are wholly composed of corals, shells, and trilobites, held together by shale. Vestiges of the Natural History of Creation The fossils comprise several corals, varieties of mollusca, and a class of crustaceans peculiar to the very early rocks—the trilobites. Story of Creation as Told By Theology and By Science Unlike their Cambrian ancestors, many of the Ordovician trilobites could roll themselves into balls at the approach of danger. The Elements of Geology The Captain laughed a little and went off; thinking however not so much of his trilobites as of the sweet fearless look the little face had given him. Melbourne House, Volume 1 The Silurian was the great age of trilobites; the Devonian, the age of fishes; Mesozoic times swarm with the gigantic reptiles; and in Tertiary times the mammals are dominant. Time and Change Blind trilobites are also found as well as those which have the largest eyes, such as Microdiscus on the one hand, and Anoplenus on the other. The Student's Elements of Geology Instead of rudimentary trilobites, I noticed remains of a more perfect order of beings, amongst others ganoid fishes and some of those sauroids in which palaeontologists have discovered the earliest reptile forms. A Journey to the Interior of the Earth Figure 268, C, is a restoration of the trilobite, and shows the appendages, which are found preserved only in the rarest cases. The Elements of Geology You know better than I do his admirable labours on the development of trilobites, and his most important work on his Lower or Primordial Zone. More Letters of Charles Darwin — Volume 1 No trace of any vertebrate had been found there; only starfish, shell-fish, polyps, or trilobites whose kindly descendants he had often bathed with, as a child on the shores of Quincy Bay. The Education of Henry Adams We come next to the most typical portion of the Devonian system, including the great limestones of Plymouth and Torbay, replete with shells, trilobites, and corals. The Student's Elements of Geology Very well," said he quietly, "it is the shell of a crustacean, of an extinct species called a trilobite. A Journey to the Interior of the Earth During the long ages of the Cambrian the trilobite varied greatly. The Elements of Geology In the succession of the older Formations the species and genera of trilobites do change, and then they all die out. More Letters of Charles Darwin — Volume 1 The newly-hatched and tiny trilobite larva, known as the protaspis, is very near to the primitive larval form of all the crustacea. Darwin and Modern Science In Bohemia the primordial fauna of Barrande derived its importance exclusively from its numerous and peculiar trilobites. The Student's Elements of Geology Fishes were as yet few and small; trilobites and graptolites had now passed their prime and had diminished greatly in numbers. The Elements of Geology For this reason and because of their abundance, trilobites are used in the classification of the Cambrian system. The Elements of Geology It is in this attitude, taken at the approach of death, that trilobites are often found in the Ordovician and later rocks. The Elements of Geology M. Barrande pointed out that these primordial trilobites have a peculiar facies of their own dependent on the multiplication of their thoracic segments and the diminution of their caudal shield or pygidium. The Student's Elements of Geology The Aymestry Limestone contains many shells, especially brachiopoda, corals, trilobites, and other fossils, amounting on the whole to 74 species, all except three or four being common to the beds either above or below. The Student's Elements of Geology They consisted chiefly of trilobites of genera distinct from those occurring in the overlying Silurian formations. The Student's Elements of Geology Some of the Cambrian trilobites were giants, measuring as much as two feet long, while others were the smallest of their kind, a fraction of an inch in length. The Elements of Geology The bedded traps consist of feldspar porphyry, and other varieties; and the interposed Llandeilo flags are of sandstone and shale, with trilobites and graptolites. The Student's Elements of Geology "Primordial" zone of Bohemia in part, with trilobites of the genera Paradoxides, etc. The Student's Elements of Geology It was not till 1870 that Mr. Billings was enabled, by means of a specimen found in Canada, to prove that the trilobite was provided with eight legs. The Student's Elements of Geology |
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