carapace

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carapace

(kâr`əpās), shield, or shell covering, found over all or part of the anterior dorsal portion of an animal. In lobsters, shrimps, crayfish, and crabs, the carapace is the part of the exoskeleton that covers the head and thorax and protects the dorsal and lateral surfaces. In many crustaceans, the term carapace is also used to describe the hard, protective covering of the cephalothorax, as that of the horseshoe crab. The carapace of a turtle's shell is composed of expanded ribs and vertebrae overlain by dermal plates and horny scales.

carapace

[′kar·ə‚pās]
(geology)
The upper normal limb of a fold having an almost horizontal axial plane.
(invertebrate zoology)
A dorsolateral, chitinous case covering the cephalothorax of many arthropods.
(vertebrate zoology)
The bony, dorsal part of a turtle shell.

carapace

the thick hard shield, made of chitin or bone, that covers part of the body of crabs, lobsters, tortoises, etc.
References in periodicals archive ?
4); nearly complete cervical tube with multiple fractures; proximal epiphysis fragment of left tibia; fragments of the carapace and isolated scutes.
The hexagonal shape gradually disappears toward the sagittal line of the carapace and the outline of the scutes becomes more flower-like.
Tissues of affected carapace were removed from the half of each lesion that was not sampled for bacterial evaluation.
Initial bacterial exposures to lobsters with intact carapace (no abrasion), yielded no development of lesions at the exposure site after 7 wk (n = 2 lobsters).
Sexual dimorphism in carapace length in four species of turtles caught in a riverside pond in west-central Illinois compared using Kruskal-Wallis test.
The frontal region on all the preserved carapace material is very poorly preserved, but the texture of the dorsal surface; the size, shape, and serration pattern on the teeth on the anterolateral margin; and the nature of the posterolateral margin conform closely to the type description.
7-42 mm wide carapace with good anterolateral margin and claw with small, domed denticles
Three morphological traits were characterized for each individual of each species: (1) the arrangement of granules on the lateral carapace, (2) carapace color, and (3) the presence of spines on both sides of the lateral margin of the carapace.
Eggs, if present, escape the carapace and are visible because of internal pressure or as a result of gently pressing the prosomal angle.
In a separate experiment, we compared the number of bacteria present on healthy carapaces and in lesions.
Importantly, at the histologic level the carapaces appeared to be normal (lesions did not result from poorly formed carapace) and the disease resulted from invasion of the carapace from the carapace surface (not from an internal disease or abnormality).
Carapace widths, carapace lengths, chela height, and chela length were measured to the nearest millimeter below by using calipers.