Heat-loving gloss snail
| Heat-loving gloss snail | ||||||||||||
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Warmth-loving gloss snail ( Aegopinella minor ) |
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| Aegopinella minor | ||||||||||||
| ( Stable , 1864) |
The heat- loving gloss snail ( Aegopinella minor ) is a species of snail from the family of the gloss snail (Oxychilidae) that lives on land . The species is also found in Germany. The differentiation from other Aegopinella species is often only possible by examining the genital system.
features
The right-hand winding shell of the heat-loving gloss snail is flattened-conical, and measures 6 to 10 mm in width and 3.1 to 3.5 mm in height. It has 3½ to 4½ tightly wound, regularly increasing turns. The seam is very flat. A keel is indicated on the moderately curved periphery. The last quarter of the end turn is slightly widened towards the mouth (about one and a half times), but not lowered. The mouth is slightly flattened-elliptical. The mouth edge is straight and tapered sharply. The umbilicus is wide open, slightly eccentric and takes up about a quarter of the width of the case.
The skin is slightly yellowish-brown in color. The case base is milky white. The surface shows fine strips of growth at more or less regular intervals.
In the male tract of the genital apparatus, the spermatic duct (vas deferens) enters the very long epiphallus.This initially thickens slightly, then becomes thinner again and gradually merges into the comparatively short penis (epiphallus / penis ratio over 2: 1). The penile retractor muscle attaches to the initial thickening of the epiphallus. The free fallopian tube is very long and the vagina is very short. The stem of the spermathek is very short, the bladder lies below the egg ladder.
Similar species
The shell is on average slightly smaller than that of the long-mouthed gloss snail ( Aegopinella nitens ). The end quarter of the last turn is usually less widened. The housing color is usually lighter in fresh copies. In individual cases, however, the species can only be reliably differentiated by examining the genital tract. The warmth-loving gloss snail differs from most other species of the genus Aegopinella by the very long epiphallus, which is at least twice as long as the penis. The penile retractor muscle attaches to a thickening at the entrance to the epiphallus. The latticed gloss snail ( Aegopinella ressmanni ) shows similar conditions, but it is larger and has a lattice pattern on the surface of the shell .
Geographical distribution and habitat
The distribution area extends over Central Europe, Southeast Europe and southern Eastern Europe to the Caucasus. It is largely absent in Western Europe, the British Isles and Scandinavia. Most of them are isolated occurrences. In Germany, the species occurs mainly in the southwest in Franconia and the northern low mountain ranges. On the Iberian Peninsula there are isolated occurrences in Catalonia and southern Spain.
The species prefers warm, dry locations on meadows, pastures, stony and grassy river terraces, limestone cliffs and also limestone walls and in strips of bushes on open slopes, rarely also in forests.In Switzerland it rises to 2,400 m above sea level, in Bulgaria to 1,200 m.
Taxonomy
The taxon was first described by Giuseppe Stabile in 1864 as Hyalina nitens Minor . It is generally recognized as belonging to the genus Aegopinella Lindholm, 1927.
Danger
The species is considered endangered in northern Switzerland, Lower Saxony and Rhineland-Palatinate, and seen across Germany as endangered. In Saxony it is a kind of pre-warning list.
literature
- Michael P. Kerney, RAD Cameron, Jürgen H. Jungbluth: The land snails of Northern and Central Europe. 384 pp., Paul Parey, Hamburg & Berlin 1983, ISBN 3-490-17918-8 , pp. 165/66
- Adolf Riedel: About the Aegopinella species (Gastropoda, Zonitidae) from Yugoslavia, Italy and France. Annales Zoologici, 37 (5): 235-258, 1983 PDF
Individual evidence
- ↑ Jürgen H. Jungbluth and Dietrich von Knorre: Trivial names of land and freshwater mollusks in Germany (Gastropoda et Bivalvia). Mollusca, 26 (1): 105-156, Dresden 2008 ISSN 1864-5127 , p. 123.
- ^ Alexandru V. Grossu: Gastropoda Romaniae 4 Ordo Stylommatophora Suprafam: Arionacea, Zonitacea, Ariophantacea şi Helicacea. 564 S., Bucharest 1983, pp. 116-118.
- ↑ a b c 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 (p. 397)
- ^ Giuseppe / Josef Stabile: Mollusques terrestres vivants du Piémont. Atti della Società Italiana di Scienze Naturali, 7 (1): 3-141, Milan, 1864 Online at Biodiversity Heritage Library , p. 31.
- ↑ AnimalBase: Aegopinella minor (Stabile, 1864)
- ↑ Fauna Europaea: Aegopinella minor (Stabile, 1864)
- ↑ MolluscaBase: Aegopinella minor (Stabile, 1864)
- ^ Vollrath Wiese: The land snails of Germany. 352 pp., Quelle & Meyer, Wiebelsheim 2014, ISBN 978-3-494-01551-4 (p. 88)
- ↑ Katrin Schniebs, Heike Reise, Ulrich Bößneck: Red List of Mollusks of Saxony. State Office for Environment and Geology, Free State of Saxony, 2006. PDF