Erepta stylodon
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_-_Helicarionidae_-_Mollusc_shell.jpeg)
Two cases by Erepta stylodon in the Naturalis Museum . |
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| Scientific name | ||||||||||||
| Erepta stylodon | ||||||||||||
| ( Pfeiffer , 1842) |
Erepta stylodon is an endangered land snail species that is found in Mauritius .
features
The case height is 8.1 to 12.5 mm and the case diameter 11.8 to 18.5 mm. The housing is almost conical, robust and imperforate. There are six turns. The sculpture, which is missing on the protoconch, consists of very fine, twisted spiral strips. There is a thick, distinct, spiral-shaped callus on the umbilical edge of the peristome . The edge of the case mouth is not turned over. The case base is shiny. The color of the case is dark brown with a broad yellowish-brown band below the periphery. The antennae, head, body and tip of the tail are black. The base of the foot is white.
status
Erepta stylodon has been in the IUCN Red List in the " critically endangered " category since 1996 . The species is extremely rare and has always been referred to as rare in the literature. The French naturalist Jean-Pierre Sylvestre de Grateloup noted in 1841:
"Moka district and Vallée des Prètres, in less humid places, under rocks, not often."
Arthur Morelet wrote in 1860:
"Moka district, under rocks, on the inland side of Le Pouce, in a relatively small area."
In 1958, the Mauritius Institute undertook the last live specimen collection in the Bambou Ranges. The last site where there are still living specimens is a 10 hectare area on Montagne Brise Fer. One of the main threats comes from the poison Brodifacoum , which is used to combat rodents .
literature
- Owen Lee Griffiths, Francois Benjamin Vincent Florens : A Field Guide to the Non-Marine Molluscs of the Mascarene Islands: (Mauritius, Rodrigues and Reunion) and the Northern Dependencies of Mauritius , Bioculture Press, Mauritius, 2006, p. 123
Web links
- Erepta stylodon inthe IUCN Red List of Threatened Species 2017.2. Listed by: Owen Griffiths, 1996. Retrieved September 21, 2017.
Individual evidence
- ↑ Quoted in: Louis Germain : Faune malacologique terrestre et fluviatile des Iles Mascareignes , 1921, p. 124
- ↑ Arthur Morelet: Séries conchyliologiques, comprenant l'énumération de mollusques terrestres et fluviatiles recueillis pendant le cours de différents voyages, ainsi que la description de plusieurs espèces nouvelles , 1860, p. 55