Scientific name Trissexodon constrictus | Superfamily Helicoidea Genus Trissexodon Rank Species | |
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Similar Trissexodontidae, Escargot de Quimp, Stylommatophora, Helicidae, Cepaea | ||
Trissexodon constrictus is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Trissexodontidae.
Contents
Trissexodon constrictus is the type species of the genus Trissexodon.
Distribution
This species is found in France and Spain: from the western Pyrenees to Biscay. It is an endemic species of the western Pyrenees.
Description
The shell is finely and regularly ribbed. It is strongly depressed on the upper side. The lower side is rounded. The shell has 5-6 whorls. The aperture has a characteristic shape. The lip is reflected and forms a "U" shape when seen from above. The umbilicus is deep and covers 1/7 of the shell diameter.
The width of the shell is 6-8 mm; the height of the shell is 3-4 mm.
Ecology
Trissexodon constrictus is found under stones in the soil of humid and shady forests, also between moss and under leaves, from sea level to 800 m, exceptionally to altitudes of 1500 m.