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.
Pinhole Three-Tooth
(Say, 1825)
Triodopsis fallax
Class:
Order:
Family:
Gastropoda
Stylommatophora
Polygyridae
ANSP 113133
Ecological Information
Native/Inavsive:
Native
Nature Serve Conservation Status:
G5: Secure
Median Size:
8
Height:
Width:
12
Taper:
0.7
Taxonomic Information
Helix fallax
Original Combination:
fallax = deceptive
Etymology
Original Description:
Spire convex; volutions five, with elevated lines forming grooves between them: labrum-reflected, contracting the aperture, bidentate; teeth seperated by a profound sinus; superior tooth inflected into the mouth; inferior tooth situated near the base: labrum with a large, prominent, oblique, lamelliform tooth, curving downwards so as nearly to reach the termination of the labrum: umbilicus open, exhibiting the volutions.
Greatest transverse diamter 9/20 of an inch.
This resembles the tridentata, Nob. but the upper tooth of the labrum is much inflected, the spire is more elevated, and the size is less considerable; in the former character it coincides with H. inflecta, Nob. but that shell has the umbilicus closed.
Original Description Citation:
Say, T. (1825). Descriptions of some new species of fresh water and land shells of the United States. Journal of the Academy of Natural Sciences of Philadelphia, 5(1): 119-131
Citations
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