Truncatellina

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Truncatellina
Cylinder diaper snail (Truncatellina cylindrica)

Cylinder diaper snail ( Truncatellina cylindrica )

Systematics
Order : Lung snails (pulmonata)
Subordination : Land snails (Stylommatophora)
Superfamily : Pupilloidea
Family : Diaper snails (Vertiginidae)
Subfamily : Vertigininae
Genre : Truncatellina
Scientific name
Truncatellina
Lowe , 1852

The genus Truncatellina is a genus of snails of the family of diaper snails (Vertiginidae) from the suborder of land snails (Stylommatophora).

features

The cases of the representatives of the genus Truncatellina are ovoid-cylindrical, cylindrical to slightly conical-cylindrical with five to seven, convexly arched turns. They are 1.2 to 2.5 mm high and 0.6 to 1.1 mm wide. The shell is comparatively fragile to firm. The color varies from pale brown to horn-colored. They are usually uniformly colored, the ribs are rarely a little lighter. The postembryonic sculpture consists of more or less fine strips of growth up to sharp, more or less dense ribs. The mouth is simple, or thickened with lips or broadly turned. Accordingly, the needle-shaped navel is open or covered. The mouth can be toothless or reinforced with up to three "teeth" (parietal, columellar and palatal). In some species, not all teeth are visible in the frontal view, but lie deep in the mouth. The teeth only develop when the animals are approximately adult.

In the sexual apparatus there is a short penis and a short, conically shaped epiphallus, which are separated from each other by a sphincter muscle. The sphincter muscle between the penis and epiphallus is comparatively wide. The inside of the penis has smooth longitudinal folds. The prostate consists of a few acini . The penile retractor muscle attaches to the transition from the sperm duct to the epiphallus. The spermatic duct is comparatively short and not twisted. The vagina is long and narrow. The stem of the elongated egg-shaped seminal vesicle is comparatively long. The lower pair of tentacles is missing on the head.

Geographical distribution

The species of the genus Truncatellina are distributed worldwide with the exception of Australia and the Antarctic.

Taxonomy

The taxon was established by Robert Thomas Lowe in 1852 . Type species through monotype is Pupa linearis Lowe, 1852. Currently more than 40 species are included in this genus. The following list is essentially a compilation based on Cardona (2010):

supporting documents

literature

  • Anatolij A. Schileyko: Treatise on Recent Terrestrial Pulmonate Molluscs. Part 2. Gastrocoptidae, Hypselostomatidae, Vertiginidae, Truncatellinidae, Pachnodidae, Enidae, Sagdidae. Ruthenica, Supplement 2 (2): 129-261, Moscow 1998 ISSN  0136-0027
  • Wilhelm Wenz: Gastropoda extramarina tertiaria. In: Carl Diener (Ed.), Fossilium catalogus, 1 Animalium , 20: 737-1068, Berlin 1923 Online at www.biodiversitylibrary.org (pp. 1017-1022)

Individual evidence

  1. ^ Richard Thomas Lowe: Brief diagnostic notices of new Maderan land shells. Annals and Magazine of Natural History, 2nd series, 9 (50): 112-120, 275-279, London 1852 Online at www.biodiversitylibrary.org .
  2. ↑ Josep Quintana Cardona: Truncatellina beckmanni sp. nov. (Gastropoda: Pulmonata: Vertiginidae: Truncatellininae), una nueva especie endémica de Menorca (Islas Baleares, Mediterráneo occidental). Spira, 3 (3-4): 149-158, 2010 PDF  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (596 KB)@1@ 2Template: Dead Link / www.molluscat.com  
  3. ^ Bernhard Hausdorf & Torsten Wronski: First records of Truncatellina species from Arabia (Gastropoda: Vertiginidae). Journal of Conchology, 40: 505-508, 2011.
  4. ↑ a b Beata M. Pokryszko, Kurt Auffenberg, Jaroslav Č. Hlaváč, Fred Naggs: Pupilloidea of ​​Pakistan (Gastropoda: Pulmonata): Truncatellininae, Vertigininae, Gastrocoptinae, Pupillinae (In Part). Annales Zoologici, 59 (4): 423-458, 2009 doi : 10.3161 / 000345409X484847 .
  5. ^ A b Mathias Harzhauser, Martin Gross, Herbert Binder: Biostratigraphy of Middle Miocene (Sarmatian) wetland systems in an Eastern Alpine intramontane basin (Gratkorn Basin, Austria): the terrestrial gastropod approach. Geologica Carpathica, 59 (1): 45-58, 2008
  6. ^ Mathias Harzhauser, Thomas A. Neubauer, Martin Gross, Herbert Binder: The early Middle Miocene mollusc fauna of Lake Rein. Palaeontographica Department A, 302 (1-6): 1 - 71, 2014.

Web links

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