visceral hump

visceral hump

the dorsal part of molluscs that accommodates the visceral organs. It is usually covered by the mantle and shell.
Mentioned in ?
References in periodicals archive ?
Presidents are not elected to reduce their countries to a snail's visceral hump and shell which move only when the occupier thinks they should move.
It also effectively divides the body cavity into two sub-cavities, the lower of which includes the mouth, buccal mass and male and female genitalia while the upper contains the visceral hump. The muscle fibres associated with the lung floor correspond to the structure in Lymnaea catascopium Say, 1817 that Walter (1969) called the "transverse membranous mid-body ('cervical septum')", but which was difficult to separate from the lung floor in P.
The physid musculature as a whole facilitates the swinging movement by (i) strengthening the lung floor so that it supports the rotating visceral hump and (ii) providing a broad anchorage in the head and foot for the contractions of the effector muscles Pf and Pm5 during rotation.