| 单词 | chitinous |
| 例句 | She screamed, and a giant reddish blur slammed into the wasp-man, yellow teeth tearing off its dark, chitinous face. Bone Gap 2015-03-03T00:00:00Z Stomach-curdling by itself, it also happens to pose a major hurdle to defeating chitinous bloodsuckers. Scary Novels From Nick Lake, Kenneth Oppel and Roseanne A. Brown 2022-09-30T04:00:00Z And a crackle now and again — testament to all those chitinous exoskeletons. My first taste of flesh 2013-03-12T00:00:00Z It is made up of two layers: the epicuticle, which is a thin, waxy water-resistant outer layer containing no chitin, and the layer beneath it, the chitinous procuticle. Fundamentals of Biology 2015-01-01T00:00:00Z A chitinous scraper called the radula is present in most mollusks. Concepts of Biology 2013-04-25T00:00:00Z And they long ago lost cockroaches’ repulsive dignity, gnarly size and gleaming chitinous armour. A giant crawling brain: the jaw-dropping world of termites 2018-09-18T04:00:00Z Its secret is that it uses its leg muscles to bend the chitinous exoskeleton encasing its thorax, which functions as a spring or bow. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z No less astounding than their light and magic displays are the guanine crystal reflectors that produce them, found in perfect hexagonal arrays under the chitinous cuticle of the copepod. How Do Sea Sapphires Become Invisible? 2015-07-23T04:00:00Z Annelids show the presence numerous chitinous projections termed chaetae, and polychaetes possess parapodia. Fundamentals of Biology 2015-01-01T00:00:00Z The presence of chitinous hairs called chaetae is characteristic of most members. Concepts of Biology 2013-04-25T00:00:00Z Alien nests close to growing cities mean a steady stream of chitinous monsters appearing at your doorstep, keen to see your new colonies and maybe eat your legs. 'Civilization: Beyond Earth' takes the strategy series out of the stratosphere 2014-10-23T04:00:00Z The head of the trap-jaw ant is covered with a chitinous exoskeleton that muscles inside the head can bend like an archer’s bow. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z The fossil also clearly showed signs of tiny spicules and a cuticle — a feature that aplacophorans possess today in the form of a chitinous covering. Take This Shell and Shove It: The Mollusk That Became a Worm 2012-12-31T18:45:00.227Z Crustaceans have a chitinous exoskeleton that is shed by molting whenever the animal increases in size. Fundamentals of Biology 2015-01-01T00:00:00Z Another subcircuit pulsates the gastric mill, a muscular pouch lined with chitinous teeth that help break down food. The Connectome Debate: Is Mapping the Mind of a Worm Worth It? 2012-10-02T17:15:05.237Z These spiracles have firm chitinous edges, and can be closed by valves moved by special muscles. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z A muscle loads resistance into the chitinous exoskeleton spring, which is held in place with a yet-uncharacterized latch. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z They should be preserved in alcohol, and on account of their usually strong chitinous covering, precautions as to the strength of the alcohol are less necessary here than with softer-bodied specimens. Directions for Collecting and Preserving Insects 2012-03-28T02:00:31.483Z The suckers bear chitinous rings which are toothed along the outer edge. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z In nearly all Crustacea the antennules and often also the antennae bear groups of hair-like filaments in which the chitinous cuticle is extremely delicate and which do not taper to a point but end bluntly. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z Digestive System.—A striking feature in the food-canal of the Hexapoda, as in other Arthropods, is the great extent of the “fore-gut” and “hind-gut,” lined with a chitinous cuticle, continuous with the exoskeleton. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Its secret is that it uses its leg muscles to bend the chitinous exoskeleton encasing its thorax, which functions as a spring or bow. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z Worms differ from the other four groups in having no articulated appendages, and in having a soft body-wall or integument instead of a dense chitinous covering, and are separated as a special class Vermes. Directions for Collecting and Preserving Insects 2012-03-28T02:00:31.483Z The family Onychoteuthidae is remarkable for the formidable chitinous hooks borne on the arms. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z He did not need to dip his head to see each chitinous shard fall spinning to the floor, sparkling in the sunlight. Gifts of the Magi 2011-11-30T18:20:55.930Z Margins of foot well developed; eyes superficial; three chitinous stomachal plates; shell external, with reduced spire. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z The head of the trap-jaw ant is covered with a chitinous exoskeleton that muscles inside the head can bend like an archer’s bow. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z The other four groups of segmented animals possess in common the feature of jointed appendages and a covering of chitinous plates, and are brought together under the term Arthropoda. Directions for Collecting and Preserving Insects 2012-03-28T02:00:31.483Z The shell is chitinous and shorter than the body. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z That such enzymes are formed in the protoplasm is evident from the behaviour of hyphae, which have been observed to pierce cell-membranes, the chitinous coats of insects, artificial collodion films and layers of wax, &c. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Shell largely chitinous, not spiral, its calcareous apex projecting through a small hole in the mantle. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z A muscle loads resistance into the chitinous exoskeleton spring, which is held in place with a yet-uncharacterized latch. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z For further special directions for mounting, for microscopic purposes, different insects and the different parts of insects, representing both the external chitinous covering and the internal anatomy, the student is referred to special works. Directions for Collecting and Preserving Insects 2012-03-28T02:00:31.483Z In this species the shell is a well-developed chitinous pen or gladius with a thickened axis narrowing to a point behind, but bearing posteriorly a wide thin plate on each side. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z These cells are enclosed in a flask-like receptacle, the walls of which consist of two chitinous layers, a delicate inner membrane and an outer one of considerable stoutness. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The cryptomycota "must be a really ancient group of organisms that diverged from the rest of the fungi by the loss of chitinous walls", says Hawksworth. The Evolutionary Tree of Fungi Grows a New Branch 2011-05-11T21:15:00.400Z In his hands he bore a long, sharp-pointed chitinous spear. The Mad Planet 2011-03-02T03:00:25.117Z In these forms the chitinous lining of the tubes is thickened by a close-set spiral ridge similar to the spiral thickening of the cellulose wall of the spiral vessels of plants. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" These hooks are special modifications of the toothed chitinous ring which covers the sucker-rim in the Decapoda generally. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z The pneumatic coat also contains the microscleres characteristic of the species; it is often limited externally by a third chitinous membrane, on which more gemmule-spicules sometimes lie parallel to the surface. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z That any partial fusion of originally distinct chitinous plates takes place in the cephalic shield of Trilobites, comparable to the partial fusion of bony pieces by suture in Vertebrata, is a suggestion contrary to fact. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 "Apollodorus" to "Aral" Another struggle, and Burl's head emerged into the open air, and he stared down for twenty feet upon an open space almost carpeted with the chitinous remains of his present captor's former victims. The Mad Planet 2011-03-02T03:00:25.117Z In Peripatus and the Diplopods they consist of bunches of fine tubes which do not branch but diverge from one another; the chitinous lining is smooth. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" The body-wall is highly muscular and, except in a few probably specialized cases, possesses chitinous spines, the setae, which are secreted by the ectoderm and are embedded in pits of the skin. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" No foraminal tubule; its place sometimes taken by an open, bowl-shaped chitinous structure the base of which is in continuity with the inner chitinous coat of the gemmule. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z It consists of a single layer of cells, continuous with those which secrete the general chitinous covering of the prosoma. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 "Apollodorus" to "Aral" In a moment she was a shaggy mass of biting ants, rending and tearing at her chitinous armour. The Mad Planet 2011-03-02T03:00:25.117Z The chitinous chaetae have their origin in special ectodermal pits, at the base of which is one large cell which is thought to secrete the chaeta, as in Chaetopods. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" Setae.—These chitinous, rod-like, rarely squat and then hook-like structures are found in the majority of the Chaetopoda, being absent only in certain Archiannelida, most leeches, and a very few Oligochaeta. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" This sponge is allied to S. indica, but is distinguished among other characters by its sharp skeleton-spicules and by the fact that the gemmule is covered by two chitinous membranes instead of one. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z In the living genera, except Spirula, the shell is a chitinous gladius. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" Along the sutural border of the elytron, the chitinous lamella forms a tubular space within which are numerous glands. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" The free edges of the mantle often bear chitinous bristles or setae which project beyond the shell. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" There are two chitinous jaws in the buccal cavity, a dorsal and a ventral, which are of specially complicated structure in Cirrodrilus. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" The outer layer is contained in a chitinous membrane which spreads out over the base of the sponge. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Internal shell without a distinct phragmacone, calcified or simply chitinous. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" Its bulky, box-like body was completely covered with a chitinous armor that gleamed pale yellowish green. Astounding Stories, May, 1931 On this distended receptacle appear several darker plates; these are the remains of the chitinous parts of the primitive wings. The Industries of Animals Diagonally, forty feet away, the underground fifty-thousand-gallon storage tank which supplied the gasoline pumps of the station perched, isolated, on a column of striated clay, ribbed with chitinous Gel buttresses. It Could Be Anything There is a thick chitinous membrane at the base of the sponge. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Body short, rounded at the aboral end; fins rounded, inserted in middle of body-length; shell chitinous, small or absent. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" There was a slight spurt of body fluid as the chitinous armor was partly broken. Astounding Stories, May, 1931 Despite their thick, chitinous skeleton, almost all insects have extremely sensitive touch, especially in the antennæ, but not confined thereto. The World's Greatest Books — Volume 15 — Science The galea, or middle division, forms a simple lobe, while the lacinia has two large chitinous teeth on the inner edge, and internally four or five hairs arising from a thin edge. Our Common Insects A Popular Account of the Insects of Our Fields, Forests, Gardens and Houses Each gemmule is covered with a thick chitinous membrane in close contact with its wall and surrounding it completely. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Shell internal and chitinous, ending aborally in a little narrow cone; tentacular arms short and thick; suckers with denticulate rings. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" Every normal crustacean, on the other hand, has the abdominal region of the body covered by a thick chitinous shell. Natural Law in the Spiritual World Armature: applied to the spinous or chitinous processes on the legs, body or wings; or the corneous parts of genitalic structures. Explanation of Terms Used in Entomology Did the soft, baggy female Stylops live exposed, like its allies in other families, to an out-of-doors life, its skin would inevitably become hard and chitinous. Our Common Insects A Popular Account of the Insects of Our Fields, Forests, Gardens and Houses The membrane is in close contact with a dense cage of skeleton-spicules arranged parallel to it and bound together by chitinous substance. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Body elongated and conical; fins extending forward beyond the middle of body-length; shell chitinous, well developed. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" The uneasy rustling of chitinous arms against white robes recalled him from his meditation. The Worshippers Scutes: the chitinous shields or plates on the segments of larvae. Explanation of Terms Used in Entomology The insects have muscles inside their chitinous shells. The Insect Folk Freshwater polyps which produce eggs with hard chitinous shells. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Alimentary Tube.—The principal differences from Nautilus are the following:—the mandibles are similar in shape, but are chitinous, not calcified. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" The chitinous shell is hyaline and plastic to a slight extent, so that the body is capable of some change in shape. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 Spiral fibre: the spiral thickening or folding of the chitinous lining of a trachea, which gives to the latter its characteristic microscopic appearance as well as its support and elasticity:= ctenidium. Explanation of Terms Used in Entomology Indirect Protection.—The indirectly protected group includes those spiders which are rendered inedible by the possession of sharp spines and chitinous plates, and also those that mimic other specially protected creatures. A Book of Natural History Young Folks' Library Volume XIV. It is always difficult to see the collar of Paludicella, because of its transparency and because of the fact that its pleats are apparently not strengthened by chitinous rods as is usually the case. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z From the distal ends of the cells are secreted chitinous rhabdomeres, forming a rhabdom which occupies and fills up the central portion of the cup beneath the middle of the corneal lens. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" The test is chitinous; covered by foreign particles, growth rings frequent Genus *Tintinnopsis 4. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 Veins: the chitinous, rod-like structures supporting the wings, and especially those extending longitudinally from base to the outer margin nerves nervures; nervules. Explanation of Terms Used in Entomology The most profound metamorphosis is but a special type of growth, accompanied by successive castings and renewings of the chitinous cuticle, which envelopes all arthropods. The Life-Story of Insects The wall of the spherical part of the gizzard consists of two layers of cells, an outer muscular layer consisting of powerful circular muscles and an inner glandular layer, which secretes the chitinous lining. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The hard chitinous covering secreted by many of the Hydrozoa. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science The test is chitinous, often covered by foreign particles. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 Tendon: the slender, chitinous plates, bands, strap- or cup-shaped pieces, to which muscles are attached for moving appendages: see apodeme. Explanation of Terms Used in Entomology They have an oblong, disklike body, supported by a thin chitinous plate, from which rises a thin diagonal crest which acts as a sail. The Gutenberg Webster's Unabridged Dictionary Section T, U, V, and W The zoœcium is usually surrounded by a chitinous margin, and outside this margin there is often a greater or less extent of adherent membrane. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z It consists of several muscles and a cartilage which supports a chitinous radula, or lingual ribbon, armed with teeth. The Gutenberg Webster's Unabridged Dictionary Section M, N, and O Medium-sized ciliates, inclosed in a chitinous lorica with embedded sand crystals. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 Tentorium: a chitinous frame-work within the head, upon which the brain rests. Explanation of Terms Used in Entomology The trematodes usually have a flattened body covered with a chitinous skin, and are furnished with two or more suckers for adhesion. The Gutenberg Webster's Unabridged Dictionary Section T, U, V, and W The statoblasts are of considerable size and normally bear at both ends a series of chitinous processes armed with double rows of small curved spinules. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Within another leaf disintegrated remnants of a rather small animal, not a crustacean, which had simple, strong, opaque mandibles, and a large unarticulated chitinous coat, were present. Insectivorous Plants This latter organ is lined with a smooth thick chitinous membrane, and is surrounded by weak longitudinal, but powerful transverse muscles. The formation of vegetable mould through the action of worms, with observations on their habits Tubercle: a little solid pimple or small chitinous button: really a ring, which may or may not give rise to a seta. Explanation of Terms Used in Entomology Its early characteristic was the acquisition of a chitinous coat over the body. The Story of Evolution A=cellular contents; B=internal chitinous layer; C=external chitinous layer; D=pneumatic coat; E=gemmule-spicule; F=external membrane; G=foraminal tubule. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z In most of the bladders the captured animals are so much decayed that they form a pale brown, pulpy mass, with their chitinous coats so tender that they fall to pieces with the greatest ease. Insectivorous Plants The rest of the head is distended into a huge globe and the chitinous leathery cuticle of the mooncalf herds thins out to a mere membrane, through which the pulsating brain movements are distinctly visible. The First Men in the Moon Canthus: the chitinous process more or less completely dividing the eyes of some insects into an upper and lower half. Explanation of Terms Used in Entomology The gemmules germinate immediately and their contents spread out over the old skeleton, secrete a chitinous membrane and begin to build up a new sponge. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Structures formed of this substance are often referred to as chitinous. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Chitine.—The chitinous coats of insects naturally captured by the leaves do not appear in the least corroded. Insectivorous Plants Separated from this layer by a considerable interval is another layer of spicules embedded in a chitinous membrane which is in continuity with the basal membrane of the sponge. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Elytra: the anterior leathery or chitinous wings of beetles, serving as coverings to the secondaries, commonly meeting in a straight line down the middle of dorsum in repose: also applied to the tegmina in Orthoptera. Explanation of Terms Used in Entomology Small spherical gemmules are present but have only a thin chitinous covering without spicules or foramen. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Gemmules surrounded in several layers by distinct polygonal air-spaces with chitinous walls. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z There is a stout gizzard which bears internal chitinous projections and is tightly compressed when the polypide is retracted. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z If the polypide has a gizzard it does not bear internal chitinous projections. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Horn: a pointed chitinous process of the head: in the plural form applied to the antennae; q.v. Explanation of Terms Used in Entomology Zoœcia flattened, adherent; the orifice dorsal, either surrounded by a chitinous rim or situated at the tip of an erect chitinous tubule; no parietal muscles. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Gemmules without or with irregular pneumatic coat, covered by a chitinous membrane or membranes in which the gemmule-spicules lie parallel to the surface. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Polypide with an ample gizzard which possesses a uniform chitinous lining and does not close together when the polypide is retracted. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The fixed statoblasts are elongate and surrounded by an irregularly shaped chitinous membrane, which is often of considerable extent. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Infra-anal lobe: a thick, conical fleshy lobe, often ending in a chitinous point, situated beneath the vent in caterpillars. Explanation of Terms Used in Entomology The latter are broadly oval and are surrounded by a stout chitinous ring, which often possesses irregular membranous projections; the surface is smooth. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Spongill� in the gemmules of which the pneumatic layer is absent or irregularly developed, its place being sometimes taken by air-spaces between the stout chitinous membranes that cover the gemmule. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Endoskeleton: applied to those chitinous processes extending inward into the body cavity from the body wall and serving as attachments for muscles. Explanation of Terms Used in Entomology Foot-shield: in caterpillars, the chitinous plate on outer side of abdominal feet. Explanation of Terms Used in Entomology Obtected: applied to pupae when they are covered with a chitinous case which confines and conceals all appendages, though their outlines may be marked on the surface: see free, and coarctate. Explanation of Terms Used in Entomology Gizzard: a pouch-like structure between the crop and chylific ventricle furnished with chitinous teeth or plates, in which the food is prepared for the digestive juices by grinding or merely sifting = cardia. Explanation of Terms Used in Entomology The chitinous membrane or membranes are often in continuity with a membrane that underlies the base of the sponge. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Fulcrum: the chitinous envelope at the base of mouth in Diptera and Hymenoptera, covering the beginning of the oesophagus: any structure that serves as a support to another.. Explanation of Terms Used in Entomology Saddle: the chitinous plate on the anal siphon of Culicid larvae. Explanation of Terms Used in Entomology Pseudo-neurium: a false vein formed by a chitinous thickening of a wing fold. Explanation of Terms Used in Entomology Salivary pump: applied to the chitinous, cup-like structure at the base of the labial stylets of piercing Diptera; e.g. mosquitoes. Explanation of Terms Used in Entomology Like T. leidyi it is capable of producing fresh layers of living sponge on the top of old ones, from which they are separated by a chitinous membrane. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z |
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