| Trissexodon constrictus | |
|---|---|
| Apertural view of the shell of Trissexodon constrictus. Scale is in mm. | |
| Conservation status | |
| 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: | Trissexodontidae |
| Genus: | Trissexodon |
| Species: | T. constrictus |
| Binomial name | |
| Trissexodon constrictus (Boubée, 1836)[2] |
|
| Synonyms | |
|
Helix constricta Boubée, 1836 |
|
Trissexodon constrictus is a species of land snail, a gastropod in the family Trissexodontidae.
Trissexodon constrictus is the type species of the genus Trissexodon.
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It is found in France and Spain: from western Pyrenees to Biscay.[3] It is endemic species of western Pyrenees.[3]
The shell is finely and regularly ribbed.[3] It is strongly depressed on upper side.[3] The lower side is rounded.[3] The shell has 5-6 whorls.[3] The aperture is with characteristic shape.[3] The lip is reflected and forming a U when seen from above.[3] Umbilicus is deep and covers 1/7 of shell diameter.[3]
The width of the shell is 6-8 mm.[3] The height of the shell is 3-4 mm.[3]
Trissexodon constrictus can be found under stones in the soil of humid and shady forests, between moss and under leaves, from sea level to 800 m, exceptionally 1500 m.[3]
This article incorporates public domain text from the reference [3]