Columella (genus)

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Columella
Toothless diaper snail (Columella edentula)

Toothless diaper snail ( Columella edentula )

Systematics
Order : Lung snails (pulmonata)
Subordination : Land snails (Stylommatophora)
Superfamily : Pupilloidea
Family : Diaper snails (Vertiginidae)
Subfamily : Vertigininae
Genre : Columella
Scientific name
Columella
Westerlund , 1878

The genus Columella is a genus of snails of the family of diaper snails (Vertiginidae) from the subordination of land snails (Stylommatophora). According to preliminary work by Jeffrey Nekola, the genus belongs to the family of grain snails (Chondrinidae).

features

The representatives of the genus Columella have right-hand, rarely left-hand, cylindrical, rarely slightly conical cases with 5 to 8 turns. They grow up to 4 mm high and 2.3 mm wide. The surface is smooth or has only fine strips of growth. The color varies from light horn to maroon. The mouth is simple with a sharp edge. It is only slightly bent at the spindle and basal margin. The mouth is not reinforced.

In the genital system, the penis is moderately long with a short epiphallus and a short, rounded process. The spermatic duct is moderately long. The penile retractor muscle attaches roughly in the middle of the slightly clubbed epiphallus. The vagina is very long. The stem of the seminal vesicle is about twice as long as the elongated, egg-shaped seminal vesicle.

Geographical distribution

The species of the genus Columella occur in the Holarctic . Evidence from sub-Saharan Africa is still very uncertain.

Taxonomy

The genus Columella was established in 1878 by Carl Agardh Westerlund . The older generic names, Paludinella Lowe, 1852 and Edentula Clessin, 1876 are preoccupied and can therefore not be used for this taxon. Type species is Pupa inornata Michaud, 1831, a younger synonym of Columella edentula (Draparnaud, 1805). About 12 species are currently included in the genus:

supporting documents

literature

  • Beata M. Pokryszko: The Vertiginidae of Poland (Gastropoda: Pulmonata: Pupilloidea) - a systematic monograph. Annales Zoologici, 43 (8): 133-257, Warsaw 1990.
  • 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 (p. 163)
  • 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

Individual evidence

  1. ↑ Jeffrey C. Nekola: Overview of the North American terrestrial gastropod fauna. American Malacological Bulletin, 32 (1): 1–35, 2014 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. (P. 6)@1@ 2Template: Toter Link / sev.lternet.edu  
  2. ↑ P. Tattersfield, CRC Paul & JA Allen: Columella in Sub-Saharan Africa: a range extension of over 4000 kilometers? Journal of Conchology, 37: 281, 2001 Abstract
  3. ^ Carl Agardh Westerlund: Fauna Europæa molluscorum extramarinorum. Prodromus. Sistens descriptiones systematicas et criticas omnium generum et specierum horum animalium in Europe viventium et hodie cognitarum. Pp. 1-320, Berlingia, Lund 1876-1878
  4. ↑ 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. ↑ Anatolij A. Schileyko & TS Rymzhanov: Three new species of land mollusks (Pulmonata: Truncatellinidae et Hygromiidae) from Central Asia. Ruthenica, 20 (2): 109-115, St. Petersburg 2010 PDF

Web links

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