The functional significance of aperture form in gastropods

• DOI: 10.1111/j.1502-3931.1981.tb01076.x
• Publication Date: 2007-10-09T08:45:34Z
• Authors: Cathy G. McNair; William M. Kier; Pierre D. LaCroix; Robert M. Linsley
• Keywords: Aperture (computer memory)

Aperture form of marine prosobranch gastropods has evolved under the influence a number different selective forces, including: generation shell form; protection from predation; accommodation foot during clamping behavior: and water currents in out mantle cavity. correlates positively with shape most shape, turn, moderately well substrate preference. Almost all that have non-round apertures elongate aperture parallel to so currenth tend flow anteriorly posteriorly. Fresh-water pulmonates responded somewhat stresses. They exhibit behavior thus show correspondence between shape. less apertural strengthening as crab (or crayfish) predation is factor presumably because calcium carbonate available. also lack anterior-posterior elongation due absence through their Due cavity behavior, terrestrial do not modifications associated these two factors. In addition. few adaptations are present resist predation. Instead, many seem be concer-ned problems loss estivation.