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Request to editors: please do not create any more categories of gastropods by country. Instead create list articles, article with a list of the marine or non-marine gastropods of whichever country or area you are interested in. We would also like to empty and delete the two remaining country categories we have, adding that information to list ...
In some gastropods, the aperture is narrowed by protruding plaits, which help make the soft parts of the animal less vulnerable to predation. The growth of the shell is provided for by non-continuous addition of minute layers to the aperture margin (also called peristome) from the mantle border, the principal agent in the secretion of the shell.
List of gastropods described in 2010; List of gastropods described in 2011; List of gastropods described in 2012 - 2012 in molluscan paleontology#Newly named gastropods; List of gastropods described in 2013 - 2013 in paleomalacology#Gastropods; List of gastropods described in 2014 - 2014 in molluscan paleontology#Newly named gastropods
A. Abranchaea; Abronica; Abyssotrophon; Acamptodaphne; Acanthais; Acanthodaphne; Acavus; Achatina; Achatinella; Acinodrillia; Aclis; Acremodonta; Acroloxus; Acromargarita
Gastropods have the greatest numbers of named mollusk species. However, estimates of the total number of gastropod species vary widely, depending on cited sources. The number of gastropod species can be ascertained from estimates of the number of described species of Mollusca with accepted names: about 85,000 (minimum 50,000, maximum 120,000). [9]
The shell of Stenotrema florida, a land snail or terrestrial gastropod.The periostracum of this species has minute hairs, giving the snail a velvety feel A yellowish tan periostracum is visible on the lower two thirds of this juvenile (8 cm) valve of the marine bivalve Spisula solidissima The dark periostracum is flaking off of this dried-out valve of the "ocean quahog", marine bivalve Arctica ...