Planorbarius

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Planorbarius
Type species ramshorn snail (Planorbarius corneus)

Type species ramshorn snail ( Planorbarius corneus )

Systematics
Class : Snails (gastropoda)
Order : Lung snails (pulmonata)
Subordination : Water lung snails (Basommatophora)
Family : Plate snails (Planorbidae)
Genre : Planorbarius
Scientific name
Planorbarius
Duméril , 1805

Planorbarius is a genus of water pulmonary snails from the family of pancake snails (Planorbidae).

description

Top view of Planorbarius corneus .
View from below of Planorbarius corneus .

Planorbarius are medium-sized, disc-shaped snails with uniform, high whorls that reach a diameter of up to 25 mm in Europe. The copulatory organ with a small penis sheath and a large prepuce (foreskin) contains two large glandular structures. The prostate tubules (canals) open bundled directly into the spermatic duct. Like all poppy snails , the species of the genus have left-wound (sinistral) shells.

Duméril's first description was brief:

“The Planorbarius differ from the two preceding genera ( Turbinarius , Syn. From Littorina and Trochiarius ) only in that they have no operculum . They are river-dwelling species. "

distribution

Both species of the genus occur in Europe, the range of Planorbarius metidjensis extends from Spain and Portugal to Morocco and Algeria in northwestern Africa.

species

The World Register of Marine Species lists two species still occurring today:

Research history

Planorbarius was first mentioned in 1806 by Duméril in his work Zoologie analytique, ou méthode naturelle de classification des animaux, rendue plus facile à l'aide de tableaux synoptiques. mentioned with a brief description. The German professor of medicine and natural scientist Ludwig Friedrich von Froriep translated the work and added Helix cornea as a type of the genus that was monotypical at the time .

credentials

  1. ↑ a b Neubauer, Thomas A .; Bouchet, P. (2014). Planorbarius Duméril, 1805. World Register of Marine Species, accessed April 5, 2020
  2. ^ A b David S. Brown: Freshwater Snails Of Africa And Their Medical Importance. 1994, Taylor & Francis, ISBN 978-0748400263 , p. 127.
  3. ^ A b André Marie Constant Duméril: Zoologie analytique, ou méthode naturelle de classification des animaux, rendue plus facile à l'aide de tableaux synoptiques. 1806, p. 164. ( Online )
  4. ^ Linnaeus C. (1758). Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis . 10th edition. - Vermes. Testacea: 700-781. Holmiae. (Salvius).
  5. ↑ Genus taxon summary for Planorbarius at AnimalBase

Web links

Commons : Planorbarius  - collection of images, videos and audio files