Platyla curtii
| Platyla curtii | ||||||||||||
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Housing of Platyla curtii |
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| Scientific name | ||||||||||||
| Platyla curtii | ||||||||||||
| ( AJWagner , 1912) |
Platyla curtii is a land-living snail from the family of the Mulmnadeln (Aciculidae) in the order of the Architaenioglossa ("old bandworm").
features
The cone-shaped case is 2.55 to 3.1 mm high and 1.0 to 1.15 mm wide. It has 5 to 6 slightly arched turns with a deep seam. There is no edge or suture below the seam . The height of the last handle is more than half of the total case height. The mouth rises with the penultimate turn. In the frontal view, the mouth is crooked, pear-shaped, the edge of the mouth is enlarged. In the side view, the hem of the mouth shows a very small sinulus at the seam. The height of the mouth is 0.85 to 0.95 mm, the width of the mouth is 0.60 to 0.75 mm. The parietal callus is clearly visible, as is the angularis . In contrast, the umbilical callus, which stretches along the parietal callus to the angularis, is comparatively thin. It is widest in the area of the covered navel. The neck bulge, which is indistinctly delimited at the front and back, is flat; when viewed from the side it is highest in the middle. The housing is reddish to yellow-brown.
Similar species
Platyla curtii differs from the smooth sludge needle ( Platyla polita ) and from the dainty sludge needle ( Platyla gracilis ) by the lack of an edge under the seam and by the neck bulge, which is strongly developed in the latter species. Platyla dupuyi has a larger housing; but the last passage is lower in relation to the total height than in Platyla curtii . In addition, this species has almost no neck bulge. Platyla wilhelmi is also larger than Platyla curtii , but the convolutions are less arched at the periphery. The neck bulge in Platyla wilhelmi is much weaker and almost non-existent. The edge of the mouth shows a very clear sinulus below the seam in the side view.
Geographical distribution, occurrence and way of life
Platyla curtii is known from two disjoint areas: a small area in northwestern Friuli ( Italy ) and a larger area that extends from Trieste (Italy) and Zagorje near Pivka (Slovenia) through Istria to the Kvarner Bay ( Croatia ). It is unclear whether there is actually a gap in distribution between Friuli and Trieste / Zagorje or whether this is just a gap in knowledge.
The animals live underground in the mud and in the deep leaf litter between scree and rocks, mostly limestone rocks. The species was also found in the Fernitic cave near Trieste. At Ućka Gora (Croatia) specimens up to 970 m above sea level were found.
Taxonomy
The taxon was first described by Anton Josef Wagner in 1912 as Acme curtii . Boeters et al. put the species in 1989 to the genus Platyla .
supporting documents
literature
- Hans D. Boeters, Edmund Gittenberger, Péter Subai: The Aciculidae (Mollusca, Gastropoda, Prosobranchia) . Zoologische Verhandelingen, 252: pp. 1–234, Leiden 1989. PDF (pp. 106–108)
- 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
- ^ Anton Josef Wagner: Descriptions of new land and freshwater snails from southern Austria, Croatia and Bosnia. Negotiations of the Imperial-Royal Zoological-Botanical Society in Vienna, 62: pp. 246–260, Vienna Online at www.biodiversitylibrary.org (p. 259).
On-line
Web links
- Fauna Europaea: Platyla curtii (AJWagner 1912)
- Platyla curtii inthe IUCN 2013 Red List of Threatened Species . 2. Posted by: Feher, Z., 2010. Retrieved February 13, 2014.