Functional interrelations between aperture structures and soft organs in lower geophila. Report 1. Pupillina, Oleacinina

Three general functions bf the apertural armature in lower Geophila (Pupill ina, Achatinina, and Oleacinina) were revealed based on studies of;topograp hical relations between aperture structures and soft organs. In the first r eport conchological and anatomical mechanisms of implementing these functio ns in the suborders Pupillina and Oleacinina are considered. 1. The gasket function is to prevent a shift of the cauliculus connecting the visceral hu mp with cephalopodium in the aperture area. The function is realized via bo th aperture teeth cutting into the lung and the developed mantle edge. 2. T he shell management is achieved in three ways: with the columellar teeth (i ncluding the clothing apparatus); with elastic connective tissue partition of the visceral hump; with stay mechanisms, directing efforts of muscles to certain trajectories. 3. Fixation of female ducts in implemented with pari etal teeth, connective tissue partition, and connective tissue filaments at taching female ducts to the body wall.