Trissexodon constrictus

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Trissexodon constrictus
Trissexodon constrictus (MNHN-IM-2010-13289).jpeg
Shell of Trissexodon constrictus (specimen at MNHN, Paris)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Order: Stylommatophora
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 air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Trissexodontidae.

Contents

Trissexodon constrictus is the type species of the genus Trissexodon.

Distribution

This species endemic to the western Pyrenees and the Basque Country across 29 recorded localities, being recorded in Spain (throughout the Basque Mountains) and in France (in the Department of Hautes Pyrénées to Department of Pyrénées-Atlantiques), (under records of the IUCN). [3]

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. [4]

The width of the shell is 6–8 mm; the height of the shell is 3–4 mm. [4]

Ecology

Trissexodon constrictus is found under stones in the soil of humid and shady deciduous forests, between moss, under leaf litter and occasionally near cave openings. It has been recorded from sea level to 800 m, and exceptionally to altitudes of 1500 m. [3] [4]

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References

This article incorporates public domain text from the reference [4]

  1. ↑ Gómez Moliner, B.J. (2011). "Trissexodon constrictus". IUCN Red List of Threatened Species . 2011: e.T22206A9364489. doi: 10.2305/IUCN.UK.2011-1.RLTS.T22206A9364489.en . Retrieved 16 November 2021.
  2. ↑ Boubée N. (1836). "Hélice nouvelle. [Helix constricta]". L'Echo du Monde Savant et l'Hermes 3(191): 220. Paris.
  3. 1 2 Med), Benjamín Gómez Moliner (Europe & (2010-08-23). "IUCN Red List of Threatened Species: Trissexodon constrictus". IUCN Red List of Threatened Species. Retrieved 2020-03-20.
  4. 1 2 3 4 "Species summary for Trissexodon constrictus". AnimalBase, last modified 26 September 2008, accessed 12 January 2011.
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