Acicula corcyrensis
| Acicula corcyrensis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Acicula corcyrensis | ||||||||||||
| O.Boettger , 1883 |
Acicula corcyrensis is a land-living snail from the family of the Mulmnadeln (Aciculidae) in the order of the Architaenioglossa ("old bandworm").
features
The spindle-shaped to very slender conical housing is 2.6 to 4.5 mm high and 1.1 to 1.55 mm wide. It has 5 to 6¾ only slightly curved whorls with a flat seam. The regularly increasing turns show a weak edge below the seam, but this can also be missing. The Protokonch is smooth, followed by an irregular, radial stripe of grooves that gradually becomes stronger. There are 20 to 31 grooves on the penultimate deal. The mouth rises at the penultimate passage and is slightly expanded at the base. In the frontal view it is crooked pear-shaped, tapering to a point at the top. The edge of the mouth is slightly curved forward in the middle. A very small sinulus is usually formed under the seam. The inside of the mouth is noticeably thickened. It is turned over in the navel area and lies over the navel as a narrow umbilical callus. The angularis can be present or absent. The parietal callus is sharply delimited in front. The neck bulge extends from the seam of the last turn to just behind the edge of the mouth; it is particularly strongly developed at the base. The housing is red-brownish to whitish horn-colored.
Similar species
The housing of Acicula benoiti is slimmer, light brown, has a slightly more pointed apex and less dense stripes of grooves. The striped sludge needle ( Acicula lineata ) has a narrower apex and a weakly pronounced neck bulge. Acicula hausdorfi and Acicula multilineata have much more dense radial grooves.
Geographical distribution
The range of the species includes the Ionian Islands Corfu , Ithaki , Kefalonia and Zakynthos , a small area on the mainland of Greece ( Etolia-Acarnania ) and a locality ( Mani Peninsula ) on the southernmost tip of the Peloponnese .
Taxonomy
The taxon was named Acme lineata Hartm in 1883 by Oskar Boettger . var. Corcyrensis first described. A more recent synonym is Acme reitteri O. Boettger, 1883. In the past, the taxon was regarded as a variety and also as a subspecies of the striped sludge needle. Boeters et al. (1989) treat them as a separate species; Fauna Europaea also follows this view.
Hans D. Boeters, Edmund Gittenberger and Péter Subai found slightly different populations on the individual islands, which differ slightly in size, color, formation or non-formation of an edge under the seam and in the formation of the neck bulge. However, they emphasize that a subdivision into subspecies is not possible.
supporting documents
literature
- Hans D. Boeters, Edmund Gittenberger, Péter Subai: The Aciculidae (Mollusca, Gastropoda, Prosobranchia) . Zoologische Verhandelingen, 252: 1-234, Leiden 1989. PDF
- Francisco W. Welter-Schultes: European non-marine molluscs, a guide for species identification = identification book for European land and freshwater mollusks. A1-A3 S., 679 S., Q1-Q78 S., Göttingen, Planet Poster Ed., 2012 ISBN 3-933922-75-5 , ISBN 978-3-933922-75-5
Individual evidence
- ↑ a b Oskar Boettger: List of the internal mollusks collected by Messrs R. Reitter and E. Brenske in 1882 in Greece and on the Jonian Islands. Yearbooks of the German Malakozoological Society, 10: p. 313-344, Frankfurt am Main 1883 Online at www.biodiversitylibrary.org (p. 319 and p. 326/7 Acme Reitteri ).
- ↑ Fauna Europaea: Acicula corcyrensis (O Boettger 1883)
On-line
- Animal Base: Species summary for Acicula corcyrensis (O.Boettger, 1883)
- Acicula corcyrensis onthe IUCN 2013 Red List of Threatened Species . Posted by: Vardinoyannis, K. & Triantis, K., 2010. Retrieved February 13, 2014.