Pyramidula jaenensis

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Pyramidula jaenensis
Pyramidula jaenensis (Clessin 1882: Plate 4, Fig. 3, holotype [1])

Pyramidula jaenensis (Clessin 1882: Plate 4, Fig. 3, holotype)

Systematics
Order : Lung snails (pulmonata)
Subordination : Land snails (Stylommatophora)
Superfamily : Pupilloidea
Family : Pyramid snails (Pyramidulidae)
Genre : Pyramidula
Type : Pyramidula jaenensis
Scientific name
Pyramidula jaenensis
( Clessin , 1882)

Pyramidula jaenensis is a species of snail in the family of pyramid snails (Pyramidulidae) from the suborder of land snails (Stylommatophora).

features

The right-hand winding case is highly conical and measures 2.5 to 3.15 mm in height and 1.9 to 2.5 mm in width (according to Martínez-Ortí). The H / B index varies from 1.06 to 1.47, with an average of 1.24. The housing is therefore usually much higher than it is wide. It has 5 to 5½ slowly increasing turns, which are well rounded on the periphery and separated from each other by a deep seam. The last turn falls off slightly from the turn axis. The side line is convexly curved, the housing is therefore slightly broad-egg-shaped in outline. The mouth is rounded and reaches a third of the height of the case, it is hardly dented from the previous handling. The edge of the mouth is usually simple, straight and tapering sharply; it can only be turned over in the navel area. The navel is open and measures less than a quarter of the width of the case,

The casing is colored horn brown, the shell is very thin. The surface shows coarser to very fine, more or less clear growth stripes, and mostly stronger, radial lines at irregular intervals.

In the male tract of the genital apparatus, the slightly twisted, short spermatic duct penetrates apically into the epiphallus. The thick penis is comparatively very short. A large, sac-shaped appendix is ​​formed approximately in the middle of the penis. The penile retractor muscle attaches to the epiphallus. In the female tract, the free fallopian tube is only half as long as the vagina. The spermathec is small and oblong-elliptical in shape. It sits on a short stem. The protein gland is elongated-egg-shaped and very large.

Similar species

Pyramidula jaenensis is within the genus Pyramidula the species with the most highly conical housing, which has a broad, egg-shaped outline. It is often associated with Pyramidula pusilla , which, however, differs significantly by the pressed-conical housing.

Distribution area of ​​the species

Geographical distribution and habitat

The distribution area is limited to southern Spain and southern Portugal. She lives there on limestone cliffs.

Taxonomy

The taxon was set up by Stephan Clessin as Helix (Patula) Jaenensis . It is now widely accepted as a valid taxon.

literature

  • Edmund Gittenberger, Ruud A. Bank: A new start in Pyramidula (Gastropoda Pulmonata: Pyramidulidae). Basteria, 60 (1/3): 71–78, Leiden 1996 PDF (accessed June 13, 2018)

Individual evidence

  1. ↑ a b Stephan Clessin: New species. Malakozoologische Blätter, New Series, 5: 187–193, Frankfurt / M., 1882 Online at Biodiversity Heritage Library , p. 187.
  2. ↑ a b Martínez-Ortí, A., Gómez-Moliner, BJ & Prieto, CE El género Pyramidula Fitzinger 1833 (Gastropoda, Pulmonata) en la Península Ibérica. Iberus 25 (1): 77-87, 2007 Online at Biodiversity Heritage Library (accessed June 13, 2018)
  3. ↑ AnimalBase: Pyramidula jaenensis (Clessin, 1882) (accessed June 13, 2018)
  4. ↑ Fauna Europaea: Pyramidula jaenensis (Clessin, 1882) (accessed June 13, 2018)
  5. ↑ Sandra Kirchner, Josef Harl, Luise Kruckenhauser, Michael Duda, Helmut Sattmann, Elisabeth Haring: Phylogeography and systematics of Pyramidula (Pulmonata: Pyramidulidae) in the eastern Alps: still a taxonomic challenge. Journal of Molluscan Studies, 82: 110-121, 2016. doi : 10.1093 / mollus / eyv047
  6. ↑ MolluscaBase: Pyramidula jaenensis (Clessin, 1882) (accessed June 13, 2018)
  7. ^ 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. 210)