| 单词 | scute |
| 例句 | Sturgeon date to the era of dinosaurs, and with their back ridges called scutes, still bear a resemblance to kids’ dinosaur toys. How to make caviar sustainable 2018-05-14T04:00:00Z You might notice growth rings on each scute. Curious about turtles? The shelled reptile is easy to observe. 2016-05-16T04:00:00Z Both halves have sections called “scutes” — made of keratin, like your fingernails — that protect the bone underneath. Curious about turtles? The shelled reptile is easy to observe. 2016-05-16T04:00:00Z With their armor of triangular bumps or scutes, sturgeon don’t just look prehistoric. How a California caviar producer with a fake Russian name became the vanguard of sustainable aquaculture 2023-09-11T04:00:00Z The plastron is made of scutes or plates; the scutes can be used to differentiate species of turtles. Fundamentals of Biology 2015-01-01T00:00:00Z These scales, also known as scutes, are quite tough. How these fish—'tiny tanks of the Amazon'—survive piranha attacks 2021-01-21T05:00:00Z He showed me where the sturgeon’s scutes—the sharp, bony plates on its back—had been forced into the body of the paddlefish. The Day the Dinosaurs Died 2019-03-29T04:00:00Z And Borealopelta, named just this past year, is the most exquisite ankylosaur ever found – pointed scutes so delicately fossilized that experts were able to determine this trundling herbivore was colored a rosy red. The Amazing, Inflatable Ankylosaur 2018-03-04T05:00:00Z Gular scutes are more pronounced in males, who use them as weapons to flip an opponent over in a fight, Madrak says. How To Tell A Turtle From A Tortoise 2017-12-02T05:00:00Z The resulting image is still a hypothesis, naturally, but it presents an Ankylosaurus with broader spacing between relatively stubby scutes arranged in rows along its body. Presenting the New Ankylosaurus 2017-10-29T04:00:00Z Exaggerated, bony plates called scutes formed a sharp ridge down its spine and made a sort of armored triangle down its back. Research begins on sturgeon species 2017-04-08T04:00:00Z On a string of leather around Stokes’s neck hung a scute, one of the bony ridges that line an alligator’s back. ’Bama vs. Gators 2015-08-20T04:00:00Z The two-step process starts with “tagging” a fish by removing a scute, or plated armor. 3,300 pallid sturgeon tagged in effort to save species 2015-06-28T04:00:00Z Crocodylus niloticus... you knew this from the dorsal scute pattern, right? Crocodiles of Africa, crocodiles of the Mediterranean, crocodiles of the Atlantic (crocodiles part VI) 2013-03-13T03:15:00.547Z The dorsal shield stops above the shoulders and two pairs of relatively enormous scutes are located over the neck. Dissecting a crocodile 2012-05-24T17:15:07.103Z This snake was found on the forest floor by day; it is a male having 130 ventrals, an incomplete tail; cream-colored belly, and a pair of large brown spots on each ventral scute. Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala 2011-12-25T03:00:10.957Z The head bears a pair of horn-like scutes, and the scutes of the carapace and tail, which are loosely opposed or slightly overlapping, form a number of transverse rows. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z There is little actual increase in thickness of the scute after the first three or four years of growth. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z It differs from the caiman by having a bony septum between its nostrils, and its ventral scutes are thinly, if at all, ossified. The Sin of Monsieur Pettipon and other humorous tales 2011-09-17T02:00:25.067Z A neat thing about the scutes is that they’re not all flat. Dissecting a crocodile 2012-05-24T17:15:07.103Z Their body is compressed and not covered with ordinary scales, but with small juxtaposed scutes. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 3 "Fenton, Edward" to "Finistere" 2011-03-14T03:01:00.580Z Among the former we notice specially the genus Doras, which is distinguished by having a series of bony scutes along the middle of the side. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" The inner wall of each groove is the peripheral edge of the part of the scute last formed whereas the outer wall represents the inner edge of the next new area of epidermal growth. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z The scutes or dermal portions of the scales are more or less ossified, especially on the back, and form the characteristic dermal armour. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" Having removed the scutes and accompanying epidermis, we got to see the transversospinalis capitis musculature that runs along the dorsal surface of the neck. Dissecting a crocodile 2012-05-24T17:15:07.103Z In the morning we manned our scute with four muskets and six men, and took one of their shallops and brought it aboard. The Great Events by Famous Historians, Volume 11 The upper part of their head is protected by strong osseous scutes, and both the dorsal and pectoral fins are armed with powerful spines. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" Lateral parts of marginal scutes are always pale yellow and form a border around the carapace. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z The scutes on the neck, six in number, are packed closely together, the four biggest forming a square. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" As you remove the nuchal shield of an , the four scutes remain attached as a single unit and form a sort of neat little inverted box. Dissecting a crocodile 2012-05-24T17:15:07.103Z Growth of epidermal laminae results from the formation, in spring, of a new layer of epidermis beneath the existing scute. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Nearly all the scutes of the shell had fallen off and large pieces of dead bone could be pulled away, exposing a gnarled mass of regenerating bone and epidermis. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z It is noteworthy that any of the layers in the scute of a box turtle can form the cornified surface of the scute when the layers above it wear away or are shed. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Center: Same shell with some of scutes removed. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Examination of parasagittal sections of scutes revealed that they were composed of layers, the number of layers varying with the age of the scute. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z A scute from a hatchling consists of one layer. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z They are mere dips or depressions in the surface of the scute. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Contrasting pale and dark areas of the germinal layer correspond to the pattern of markings on the scute removed. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Retention of scutes protects the shell of terrestrial chelonians against wear. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Some box turtles were observed to have several scutes of the carapace in the process of exfoliation but no exfoliation was observed on the plastron. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Markings on the central and lateral scutes vary from a regularly arranged series of well defined spots and a middorsal stripe to a general scattering of small flecks. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z When growth begins, the areas of newly formed epidermal tissue on the anterior and medial borders of each areolar scute are pale. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Immediately proximal to the edge of the scute, the new layer becomes greatly thickened, and, where it passes under the edge, it bulges upward, recurving the free edge of the scute above. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Wide, dark radial marks, usually three per scute, appear on the newly formed tissue. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Box turtles ordinarily do not shed the older parts of their scutes; the areola and successively younger portions of the lamina remain attached to the shell until worn off. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z The appearance of a single unworn scute, especially one of the centrals or the posterior laterals, closely resembles a low, lopsided pyramid. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z A scute that shows a single season of growth has two layers; a new layer is added in each subsequent season of growth. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z In species that periodically shed scutes a zone of fracture develops between the old and new layers of the scute as each new layer of epidermis is formed, and the old layer is shed. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Stratification is most evident in the part of the scute that was formed in the first three or four seasons and becomes increasingly less distinct in newer parts of the scute. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z The new layer is thin and indistinct under the oldest part of the scute but becomes more distinct toward its periphery. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z This appearance of thickness is enhanced by the contours of bony shell which correspond to the contours of the scutes. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Wear on the shell of a box turtle reduces the thickness of scutes, as does the shedding of scutes in the aquatic emyids mentioned. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z The terms "scute," "lamina," and "scale" are used here more or less interchangeably for the epidermal parts as are the terms "plate," "bone," and "element" for the bony parts of the shell. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Areas of regenerated epidermis on specimens of T. ornata were rough in texture and slightly paler than the surrounding scutes. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z The phenomenon is here considered to be a specialization of scute shedding—developed in terrestrial and semiterrestrial chelonians—that provides additional protection to the shell against wear and minor injuries. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z The peripheral projection of the new layer is distinct in texture and color from the older part of the scute and is separated from it by a major growth-ring. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z Regenerated epidermis was usually thicker than the original scute. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z |
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