Malacology
Malacology is the study of mollusks. This includes animals like octopus, snails, slugs, and clams. It is the second largest phylum of animals, making them one of the most successful groups on the planet. There are over 80,000 described species of mollusks with many more left to be discovered. Mullusca is composed of 8 recognized classes including Cephalopoda, Gastropoda, Polyplacophora, Scaphapoda, Monoplacophorans, the Aplacophorans, Caudofoveata and Solenogastres, and Bivalvia.
Yellow Globelet
(Say, 1821)
Mesodon clausus
Class:
Order:
Family:
Gastropoda
Stylommatophora
Polygyridae
ANSP 11364 [lectotype]
Ecological Information
Native/Inavsive:
Native
Nature Serve Conservation Status:
G5: Secure
Median Size:
12
Height:
Width:
16
Taper:
0.2
Taxonomic Information
Helix clausa
Original Combination:
Etymology
Original Description:
Shell fragile, slightly perforated, subglobular, yellowish horn-colour, above convex.; whorls four or five; aperture slightly contracted by the lip; lip reflected, flat, white, nearly covering the umbilicus. Inhabits Illinois. Greatest breadth, fr6m one-half to three-fifths of an inch. A small and handsome species, which somewhat resembles albolabris, but is much smaller, more rounded, and is sub-umbilicate. This shell also occurs though perhaps rarely in Pennsylvania.
Original Description Citation:
Say, T. (1821). Description of univalve shells of the United States. Journal of the Academy of Natural Sciences of Philadelphia. 2(1): 149-179.
Citations
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