How To Use Operculum In A Sentence
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In amphibians, the columella shares the oval window with a second bone, the operculum, which communicates by way of an opercular muscle with the pectoral girdle.
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Ammonites had an operculum (pl. opercula) as well.
French masterclass
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Other zooids include the avicularia, where the operculum has been modified into a jaw, and the vibracula where the operculum has been modified into a bristle.
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Immobilizing snails caused them to draw their operculum deep within their shell, which may have restricted the crabs' ability to extract the flesh from the shell, even with extensive apertural breakage.
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Gently hold the male on his back with one hand to expose his underside, and with the other hand, simultaneously squeeze his body in a direction from behind the operculum to the gonopodial area.
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Spices translates three Heb. words: (1) sammum, a generic word including galbanum onycha, the operculum of a strombus, and stacte;
The Catholic Encyclopedia, Volume 12: Philip II-Reuss
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Many snails have an operculum, a horny plate that seals the opening when the snail's body is drawn into the shell.
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The chimaeran hyoid is, it turns out, quite happy supporting the operculum and has no interest in the palatoquadrate.
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The central region extending between the apophysis and the operculum is composed of sterile tissue and forms the columella (c).
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"
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The archeopyle is created by loss of an operculum that is distinguished from the adjacent cyst surface by a distinct groove.
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Furthermore, the holotype also shows that only the first pair of sternites (posterior to the genital operculum) are unfused.
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These latter filaments do not appear externally, and indeed a membrane, termed the operculum (Fig. 2, op), is developed from the front of each series of branchial apertures, Fig. 3.
The Common Frog
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Well, I think it's a Batillaria minima; I found it among Batillaria minima and the microsculpture of its shell, its operculum and the morphology of its head look like those of Batillaria minima.
Archive 2009-05-01
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Car passes the living room, an operculum widens into sluice — red filigree arches and gray fish mouth cleaves the heel of air — and seals again within its glistened sleeve.
Not from the self but from the Other
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The snail in the middle with the aperture of its shell sealed with an operculum is Pomatias elegans.
Archive 2009-09-01
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Many snails have an operculum, a horny plate that seals the opening when the snail's body is drawn into the shell.
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You can see the snail's operculum deep inside the aperture.
Archive 2009-03-01
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Insuite me defunctam in corio cervino, ac deinde in sarcophago lapideo supponite, operculumque ferro et plumbo constringite, ac demum lapidem tribus cathenis ferreis et fortissimis circundantes, clericos quinquaginta psalmorum cantores, et tot per tres dies presbyteros missarum celebratores applicate, qui feroces lenigent adversariorum incursus.
Poems, 1799
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The horny operculum with which the periwinkle, like other gasteropods, closes its shell had effectively kept out the anemone's digestive enzymes.
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Above the head and the arms is a leathery, protective hood, that acts like an operculum to protect the animal when it withdraws inside its shell.
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C, Median longitudinal section of a capsule, with the seta gradually widening into the apophysis at its base; d, operculum; p, peristome; a, annulus; c, columella; s, archesporium; h, air-space between the spore-sac and the wall of the capsule.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"
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In the second section, the ascidia are ventricose and reclinate, with the operculum free, and arched over the aperture of the tube.
Transactions of the American Philosophical Society
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They inhabit salt marshes near the sea, and are able to seal the shell with the operculum and so survive dry periods buried in mud.
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Remnants of the pectoral girdle are present, perhaps due to the presence of an operculum-opercularis-like connection to the stapes.
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It is able to withdraw the whole of its body into its shell which is then sealed by an amber-coloured operculum.
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Spices translates three Heb. words: (1) sammum, a generic word including galbanum onycha, the operculum of a strombus, and stacte;
The Catholic Encyclopedia, Volume 12: Philip II-Reuss
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The pallial eye is easy to notice when the snail lifts its operculum up and starts to come out of its shell with the aperture facing up.
Cerithidea
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These are the bones connected with respiration -- the operculum, the branchiostegal rays, the branchial arches, and others.
Form and Function A Contribution to the History of Animal Morphology
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A screw gear type differential mechanism includes a differential carrier, an operculum, a main reducing gear driven gear, left and right half axis gears, etc.
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Whenever muscular control of the operculum was established (presumably very early), it was probably based on the cleithrum.
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Anal operculum: the dorsal arch of the 10th abdominal segment; in caterpillars = supra-anal plate, q.v. Anal organs: Collembola; the two modified hairs arising from a tubercle ventro-cephalad of the anus and usually curving caudo-dorsad.
Explanation of Terms Used in Entomology
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A nail; claw; hoof, (Heb. sheheleth; Ex. 30: 34), a Latin word applied to the operculum, i.e., the claw or nail of the strombus or wing-shell, a univalve common in the Red Sea.
Easton's Bible Dictionary
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a spiny operculum, as in all but the selachian fishes, but with one of skin.
The History of Animals
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Due to the close proximity of the operculum and the pectoral fins, water jetting out of the operculum could affect flow over the pectoral fins, possibly changing locomotory efficiency.
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In the case of P. elegans, the foot has to come out first to move the operculum, which is attached to the foot, out of the way.
Sleeping Haplotrema concavum
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Avicularia are small heterozooids in which the zooecium and operculum form a beak-like, snapping structure that deters small predators.
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The halecostomes, of which Amia is an example, have an opercular dilator muscle originating on the mandible which opens the operculum.
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The operculum illustrated by Reed does not match in outline the conch, and is here considered to be a different taxon.
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From the hinder edge of the hyoid arch grows out the membranous operculum, in which develop later the opercular bones and branchiostegal rays.
Form and Function A Contribution to the History of Animal Morphology
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On the bottom of their operculum or gill-cover, they have a sharp spine. Angelfish all vary in color and pattern.
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Therefore, the operculum is always visible in complete specimens.
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From the hinder edge of the hyoid arch grows out the membranous operculum, in which develop later the opercular bones and branchiostegal rays.
Form and Function A Contribution to the History of Animal Morphology
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The spine on the operculum is the best way to identify an angelfish and to distinguish it from similar-looking species, such as butterfly fish.
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The spine on the operculum is the best way to identify an angelfish and to distinguish it from similar-looking species, such as butterfly fish.
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So the spiral of the operculum of a dextral (right-handed) snail is invariably counterclockwise, while that of a sinistral shell is the opposite.
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Ammonites had an operculum (pl. opercula) as well.
French masterclass
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In amphibians the inner ear is mechanically coupled to the pectoral girdle through the operculum.
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The nape lacks cirri, and the first gill arch attaches to the operculum, the latter characteristic distinguishing Tripterygiidae from Clinidae.
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Operculum: a lid or covering: in Diptera, the chitinous envelope covering the lower part of the muscid mouth; the labrum-epipharynx of Dimmock: the scutes covering the meso-thoracic stigmata: in
Explanation of Terms Used in Entomology
