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.
Sharp Wedge
(Say, 1821)
Xolotrema obstrictum
Class:
Order:
Family:
Gastropoda
Stylommatophora
Polygyridae
UAG ID 975
Ecological Information
Native/Inavsive:
Native
Nature Serve Conservation Status:
G4: Apparently Secure
Median Size:
8.8
Height:
Width:
17.3
Taper:
0.5
Taxonomic Information
Helix obstricta
Original Combination:
obstricta = restricted
Etymology
Original Description:
Shell depressed, with elevated lines forming grooves between them: epidermis pale brownish, naked; volutions five, depressed above, beneath rounded, with an acute projecting carina: umbilicus covered with a white callus indented: mouth resembling that of H. palliata.
Inhabits Ohio.
Breadth nearly one inch.
This species is very closely allied to Helix palliata, but the epidermis is not covered with small elvations as in that shell, and the carina is very prominent and remarkable.
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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