Renea

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Renea
Ribbed sludge needle (Renea veneta)

Ribbed sludge needle ( Renea veneta )

Systematics
Class : Snails (gastropoda)
Superordinate : Caenogastropoda
Order : Architaenioglossa
Superfamily : Cyclophoroidea
Family : Mulm needles (Aciculidae)
Genre : Renea
Scientific name
Renea
Nevill , 1880

Renea is a genus of land-living snails from the order of the Architaenioglossa ("old bandworm").

features

The right-hand wound housing of the representatives of the genus Renea are 1.8 to 6.3 mm high and 0.6 to 2.0 mm wide. They are cylindrical and have up to seven turns. The last deal increases a bit. The housings are densely ribbed, very weak spiral grooves can be seen between the ribs, which are only a little clearer in two species. No seam edge is formed in all types. Some species have a heavily modified turn, which can lead to the formation of a "breathing hole" behind the mouth and next to the suture (with Renea singularis ). A neck bulge is not or only weakly developed.

The whitish translucent body is comparatively small and slim in relation to the housing. The head is set off from the neck by a groove that runs diagonally to the edge of the sole. The sole is separated from the body by a weaker and a stronger longitudinal furrow. At the head the snout can be extended far. The thread-like feelers are long and can be retracted completely. The lid on the back of the foot is quite large and has 2½ to 2¾ whorls.

The animals are of separate sex. The comparatively few eggs laid by the females are very large in relation to their body size.

Similar genera

The genus Renea differs from the other genera of the Mulmnadeln (Aciculidae) as follows: the species of the genus Platyla are smooth, without sculpture. The genus Acicula only has radial grooves, the species of the genus Menkia also have spiral grooves in addition to radial grooves. However, both types have no radial ribs.

Geographical distribution

The distribution area of ​​the Renea species extends from the French and Italian Maritime Alps , the northern Italian Alps, the northern Apennines , through Slovenia , Croatia and Bosnia and Herzegovina to Montenegro and Albania . There is also an island-like area in the Austrian federal states of Upper Austria and Salzburg .

Taxonomy and nomenclature

The taxon Renea was proposed by Geoffrey Nevill in 1880 . Type by monotype is Renea bourguignatiana Nevill, 1880. There are a number of more recent synonyms .

  • Microceras Sandberger, 1886 (non Microceras Hall, 1845); Type species (monotype): Renea microceras
  • Pleuracme Kobelt, 1894; Type species (subsequently designated by Kobelt, 1894: p. 2): Renea spectabilis
  • Megalacme Kobelt & Möllendorff, 1899; Type species (subsequently designated by Boeters et al., 1989: p.?): Renea spectabilis .
  • Pseudotruncatella Andreae, 1904; Type species (subsequently designated by Andreae, 1904: p. 15): Renea microceras .
  • Caziotia Pollonera, 1905; Type species (monotype): Renea singularis .

After Fauna Europaea and Animal Base, the following species are currently included in the genus Renea :

supporting documents

literature

  • Hans D. Boeters, E. Gittenberger, P. Subai: The Aciculidae (Mollusca, Gastropoda, Prosobranchia) . In: Zoologische Verhandelingen. 252, Leiden 1989, pp. 1–234 (PDF)
  • Christa Frank: Plio-Pleistocene and Holocene mollusks of Austria. (Communications from the Prehistoric Commission, Vol. 62). Part 1, Austrian Academy of Sciences, Vienna 2006, pp. 48–49.
  • Francisco Welter-Schultes: European non-marine molluscs, a guide for species identification. Planet Poster Editions, Göttingen 2012, ISBN 978-3-933922-75-5 , p. 85.

Individual evidence

  1. ^ Geoffrey Nevill: On the land-shells, extinct and living, of the neighborhood of Menton (Alpes Maritimes); with descriptions of a new genus and of several new species. Proceedings of the Zoological Society of London, London 1880, pp. 94-142, pl. 13-14. (online at Biodiversity Heritage Library)
  2. ↑ Fauna Europaea - Genus Renea. Nevill, 1880
  3. ^ AnimalBase - Renea. Nevill, 1880
  4. ↑ Ivano Niero, Gianbattista Nardi, Antonio Braccia: Una nuova specie di Renea Nevill, 1880 per le Prealpi Venete (Gastropoda: Prosobranchia: Aciculidae). In: Bollettino malacologico. 48, 2012, pp. 106-115. (PDF; 2.6 MB)
  5. ^ Mathias Neubauer, Thomas A. Neubauer: Opole (Poland) - a ley locality for middle Miocene terrestrial mollusc faunas. Bulletin of Geosciences 93 (1): 71-146, 2018 doi : 10.3140 / bull.geosci.1692

Web links

Commons : Renea  - collection of pictures, videos and audio files