from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Situated in the region of the rump, or posterior end of the backbone; applied especially to the posterior median plates in the carapace of chelonians.
from the GNU version of the Collaborative International Dictionary of English
- adj. Situated in the region of the rump, or posterior end of the backbone; -- applied especially to the posterior median plates in the carapace of chelonians.
from The Century Dictionary and Cyclopedia
- In zoology, of or pertaining to the rump or posterior part of an animal.
- n. The posterior median or supracaudal plate of the carapace of a tortoise; a pygal shield.
Their distinction was also supported in a study on shell morphology by Gerlach (1999) who found notable differences in how the neural bones were arranged (these are the bones that, together with the nuchal, suprapygals and pygal, form the midline of the shell).
-- Dorsal surface of the Carapace of a Freshwater Tortoise (Emys). 1-8, expanded neutral spines; r¹-r8, expanded ribs; nu, first median (or nuchal) plate; py, last median (or pygal) plate; m, marginal scutes.
During both seasons the dirty white of the face and cheeks is only relieved by the dark facial streak, which is short and narrow, but defined by a sprinkling of rufous hairs; the lateral and pygal bands are very faintly indicated, the dark bands being more rufous, the light band rather paler than the grey fawn colour of the upper parts of the body; breast and belly white; tail and ears moderate in length, the former blackish-rufous.