Erepta wendystrahmi
| Erepta wendystrahmi | ||||||||||||
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| Erepta wendystrahmi | ||||||||||||
| Griffiths , 2000 |
Erepta wendystrahmi is an extinct land snail species that was found on the Île aux Aigrettes and in Mauritius . The art epithet honors the botanist and conservationist Wendy Strahm .
features
The collected specimens of Erepta wendystrahmi have a case height of 4.5 mm to 5.9 mm and a case diameter of 8.5 mm to 10 mm. The massive housing is pressed conical. The periphery is angular. The color is bright, glossy white. The five turns are regularly raised. The seams are moderately indented. The umbilicus (umbilicus) is slightly open or completely covered by the umbilicus (columella). About 20 distinct, low, wide, irregular radial ribs are arched like a spoke at the navel and disappear near the periphery. The outer lip of the mouth is thin and slightly turned over, except along the spindle, where it is thickened and turned outward. A light callus has formed on the spindle near the navel. The embryonic turns have fine spiral lines. The subsequent turns have fine spiral lines that are cut by fine, closely spaced radial lines and give the case a crossed sculpture when viewed under magnification.
Four of the five Erepta species known from Mauritius were found in the subfossil deposits of the Limekiln Cave on the Île aux Aigrettes. Erepta stylodon and Erepta odontina are spherical and do not have the crossed sculpture of Erepta wendystrahmi . Erepta setiliris is similar to Erepta wendystrahmi . However, this species has a broad, deeply prominent navel. Erepta thiriouxi is the only Erepta species not found in Limekiln Cave. It is conical and the crossed sculpture is also missing. Furthermore, Erepta wendystrahmi is the only Erepta species with distinct, spoke-like crests on the underside of the case.
status
The holotype of Erepta wendystrahmi was collected in February 1989 by Carl G. Jones and Owen Lee Griffiths in the Limekiln Cave on the Île aux Aigrettes. Further material includes 43 adult and subadult housing from the type locality , an adult, subfossil housing, which was collected in April 1998 by Vincent Florens in a basalt deposit under a rock overhang on the southern edge of the Bassin Blanc, an adult, subfossil housing, which was collected in January 1997 by Owen Lee Griffiths, in the basalt deposits of a lava pit 750 m southeast of the Bassin Blanc, as well as nine adult subfossil housings, which were collected in November 1997 by Owen Lee Griffiths and Jörg Hauchler in deposits on the ceiling of Lion Mountain Cave II near Treize Cantons in East of Mauritius were collected. The limestone deposits in Limekiln Cave are dated to an age of 5,000 to 15,000 years BP . The other references are undated. Griffiths suspects, based on the condition of the collected housing, that they date from the 19th century, when the forest on Mauritius was cleared. Live specimens of Erepta wendystrahmi were never found on either the Île aux Aigrettes or Mauritius.
literature
- Owen Lee Griffiths: Nine new species of Mascarene land snails (Mollusca: Gastropoda) , Molluscan Research, Volume 20 (2), 2000, pp. 37-50
Individual evidence
- ^ Owen Lee Griffiths: Nine new species of Mascarene land snails (Mollusca: Gastropoda) , Molluscan Research, Volume 20 (2), 2000, pp. 37-50