Cochlostoma acutum
| Cochlostoma acutum | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Cochlostoma acutum | ||||||||||||
| ( Caziot , 1908) |
Cochlostoma acutum is a land-living snail species from the family of the forest cap snail (Cochlostomatidae) in the order Architaenioglossa ("old bandworm").
features
The right-hand wound case is 7.3 to 7.5 mm high and 2 to 2.8 mm wide. It is slender-tower-shaped and has 10.5 turns that increase slowly and evenly. The turns are well arched and separated from each other by a clear seam. The last handle is rounded at the base, not canted. The first 2.5 turns are smooth, the remaining whorls are regularly ribbed, the ribs are widely spaced. The ribs become finer on the last turn.
The mouth is comparatively small, almost rounded with an obtuse-angled corner on the upper parietal edge. The edge of the mouth is white and widened. Only at the edge of the spindle is the edge of the mouth drawn out into an "ear". The case is horn-colored.
Similar Art
Cochlostoma acutum was regarded as a synonym of Cochlostoma simrothi until 2002 . At a locality between the Vallon de la Bendola and the Vallon de la Madonina (Dépt. Alpes-Maritimes), the two species were found sympatric living, and thus the independence of Cochlostoma acutum was proven. The housing of Cochlostoma acutum is significantly slimmer with more arched passages. The ribs are clearer and a little closer. The edge of the mouth is significantly narrower at the lower edge and towards the spindle ear. While Cochlostoma simrothi lives exclusively on limestone rocks, Cochlostoma acutum also occurs on dead wood in the forest.
Geographical distribution and habitat
The species is endemic to a very small area in the French department of Alpes-Maritimes . So far, only the following occurrences are known: Roya Valley between La Giandola , Fontan and a locality between the Vallon de la Bendola and the Vallon de la Madonina (Alpes-Maritimes department, France)
The animals live on limestone cliffs, but also on dead wood in the forest. A forest of European hop beech ( Ostrya carpinifolia ) grew at the location in the Vallon de la Bendola at 470 to 490 m above sea level .
Taxonomy
The taxon was first introduced into scientific literature in 1908 by Eugène Caziot as Pomatis acutum (spelling mistake for Pomatias acutum ). But he attributed the species to Carlo Pollonera . Apparently, he had labeled collection labels in the museum in Turin . No sole authorship or even participation by Carlo Pollonera in the first description can be recognized. The species must be attributed to Eugène Caziot.
Louis Germain named the taxon in 1931 as Cochlostoma (Anotus) acutum Pollonera. Olivier Gargominy and Theo Ripken then named it Cochlostoma (Turritus) acutum (Caziot, 1908). The fauna Europaea followed this assignment.
Danger
Due to the extremely small distribution area, the International Union for Conservation of Nature and Natural Resources (IUCN) assesses the species as endangered. The species is not protected by law in France, but the range is within the Mercantour National Park .
supporting documents
literature
- Eugène Caziot: Compte rendu d'une excursion malacologique dans la partie supérieure de la vallée de la Roya, et dans le voisinage de la mer, sur la rive droite du Var, près Nice. Mémoires de la Société Zoologique de France 20 (4): 435-469. Paris 1908 Online at www.biodiversitylibrary.org (p. 460).
- Louis Germain: Mollusques terrestres et fluviatiles (deuxième partie). Faune de France, 22: 479–897, IX-XIV, Taf. XIV-XXVI, Paris, 1931 For download (p. 582).
Individual evidence
- ↑ a b Olivier Gargominy, Theo Ripken: Données nouvelles sur les mollusques (Mollusca, Gastropoda) du Parc national du Mercantour (France) New data on the molluscs (Mollusca, Gastropoda) of the Mercantour National Park (France). MalaCo, 3: 109-139, 2006 PDF ( Memento of the original dated December 30, 2011 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Fauna Europaea - Cochlostoma (Turritus) acutum (Caziot 1908)
- ↑ Feher, Z. 2011. Cochlostoma acutum. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. <www.iucnredlist.org>. Downloaded on July 25, 2013.
Web links
- Inventaire National du Patrimoine naturelle (with photo)