Species: Vertigo arthuri
The characteristic which distinguishes Species
Vertigo arthuri is the
structure of the teeth that are contained within the aperture
opening. Their teeth are small, tubercular angular lamella which are
near the larger and long parietal lamella. Its lower side contains
columellar lamella which are stout, convex calluses. The outer lip
is heavily calloused for a short distance within the mouth. There is
a short upper-palatal fold as well as a long and deeply entering
lower-palatal run located inwards from the callus. A small basal
fold can be located near the base of the columella lamella (Pilsbry
1948).
Vertigo arthuri was
originally recognized by von Martens in 1882 (Anderson, T. 2004).
A shell from a deceased Vertigo arthuri
Image provided courtesy of
Jeffrey Nekola and Matt Kuchta
<--Genus