Flat-spired three-toothed snail
| Flat-spired three-toothed snail | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Heterobranchia clade Euthyneura clade Panpulmonata clade Eupulmonata clade Stylommatophora informal group Sigmurethra |
| Superfamily: | Helicoidea |
| Family: | Polygyridae |
| Genus: | Triodopsis |
| Species: | T. platysayoides |
| Binomial name | |
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Triodopsis platysayoides (Brooks, 1933) |
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| Synonyms | |
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Polygyra platysayoides Brooks, 1933 |
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| Flat-spired three-toothed snail | |
| Location map | |
| Coordinates | 39°39′00″N 79°50′00″W / 39.65000°N 79.83333°WCoordinates: 39°39′00″N 79°50′00″W / 39.65000°N 79.83333°W |
|---|---|
  Map of West Virginia
The red dot is Coopers Rock State Forest, where the snail Triodopsis platysayoides is found. |
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Polygyra platysayoides Brooks, 1933
Triodopsis complanata platysayoides
The flat-spired three-toothed snail (Triodopsis platysayoides)—also known as the Cheat three-toothed snail after the Cheat River in West Virginia—is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Polygyridae.
The color of the body of the animal in this species is pale gray. The shells of adult snails are 18–22 mm in width and 8 mm in height.
The shell of Triodopsis platysayoides is thin, right coiled (or dextral), and translucent, with 5 whorls. It is extremely flattened in shape. The umbilicus is open and wide. The shell is pale brown (light horn) in color; the exterior surface of the peristome is yellowish and punctate.
The aperture of the shell is oblong-lunate. The lip is thickened and white. There is a thick tongue-shaped tooth in the parietal wall of the aperture.
Triodopsis platysayoides is now a formally recognized species. It was first collected by Graham Netting at Coopers Rock, and later described by Stanley Brooks as Polygyra platysayoides from the area of Coopers Rock State Forest. The type specimen is stored in the collection of the Carnegie Museum of Natural History under number 62.23750.
The taxonomic status of T. platysayoides was subsequently questioned. In 1940 the American biologist Henry Augustus Pilsbry considered it to be a distinct species, and he also transferred it to the genus Triodopsis. However, based on rather limited information, Vagvolgyi classified Triodopsis platysayoides as merely a subspecies of Triodopsis complanata in 1968. This reclassification was not widely accepted however, and in 1974 Solem concluded that the available evidence did support full species status for this snail.
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