Abida (genus)

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Abida
Rye Grain Snail (Abida secale)

Rye Grain Snail ( Abida secale )

Systematics
Order : Lung snails (pulmonata)
Subordination : Land snails (Stylommatophora)
Superfamily : Pupilloidea
Family : Corn snails (Chondrinidae)
Subfamily : Chondrininae
Genre : Abida
Scientific name
Abida
Turton , 1831
"Teeth of the mouth": 1–6 folds or plicae: 1 = suprapalatal (suprapalatalis), 2 = upper palatal fold (superior palatalis), 3 = interpalatal (interpalatalis), 4 = lower palatal fold (inferior palatal), 5 = infrapalatal (Infrapalatalis), 6 = basal (basalis); 7-9 lamellae: 7 = infracolumellar (Infracolumellaris), 8 = columellar (Columellaris), 9 = supracolumellar (Supracolumellaris); 10–13 lamellae: 10 = infraparietal (infraparietalis), 11 = parietal (parietalis), 12 = angular (angularis) and subangular (subangularis), 13 = parallel (or spiral)

Abida is a genus of the grain snails (Chondrinidae) from the suborder of the land snails (Stylommatophora).

features

The conical-cylindrical housings are 5 to 15 mm high and 2 to 4.5 mm wide. They have 8 to 9.5 slightly curved turns. The skin is moderately thin and yellowish to brown in color, occasionally also tinged gray. The embryonic convolutions are finely granulated, the convolutions formed postembryonically have fine radial wrinkles or ribs. The mouth is rounded or ovoid. The mouth rim is bent and slightly thickened. The mouth reinforcement usually consists of an angular tubercle, a long parietal fold, a deep subparietal fold, usually two spindle lamellae, the upper columellar lamella is usually significantly longer than the lower columellar lamella. Basal teeth are absent or poorly developed. The palatal margin has three to four long folds .

In the male part of the genital tract, the penis is moderately long and has wrinkles arranged in a spiral on the inside. A blind sac (caecum) is missing or only rudimentary. In the latter case, the blind sack reaches a maximum of one seventh the length of the penis. The spermatic duct, which is not very twisted, lies close to the fallopian tube and vagina. It widens into an epiphallus that is roughly the same length as the penis. The transition is gradual and not clearly visible from the outside. The epiphallus has internally zigzag longitudinal folds. The penile retractor muscle divides into two strands, one strand attaches proximally to the epiphallus, the other strand below the middle of the penis.

In the female genital tract, free fallopian tubes and vagina are about the same length. The stem of the sperm library gradually merges into the elongated sperm library. It is not embedded in the prostate or albumin gland.

Geographical distribution

The species of the genus Abida occur in Central and Southern Europe.

Taxonomy

The taxon was originally set up in 1831 by William Turton in the synonymy of Vertigo . This is a valid suggestion under the International Rules for Zoological Nomenclature . The following species are currently assigned to the genus Abida :

supporting documents

literature

  • Edmund Gittenberger: Contributions to the knowledge of the pupillacea: III. Chondrininae. Zoologische Verhandelingen, 127 (1): 3-267, 1973 ISSN  0024-1652 PDF .
  • Michael P. Kerney, RAD Cameron & Jürgen H. Jungbluth: The land snails of Northern and Central Europe. 384 pp., Paul Parey, Hamburg & Berlin 1983 ISBN 3-490-17918-8
  • Anatolij A. Schileyko: Treatise on Recent terrestrial pulmonate molluscs, Part 1. Achatinellidae, Amastridae, Orculidae, Strobilopsidae, Spelaeodiscidae, Valloniidae, Cochlicopidae, Pupillidae, Chondrinidae, Pyramidulidae . Ruthenica, Supplement 2 (1): 1-126, Moscow 1998 ISSN  0136-0027
  • 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. ^ Gittenberger (1973: p. 11)
  2. ↑ William Turton: A manual of the land and freshwater shells of the British Islands arranged according to the more modern systems of classification; and described from perfect specimens in the author's cabinet: with colored plates of every species. SI-VIII, pp. 1–152, London, Longman etc., 1831 online at www.biodiversitylibrary.org .
  3. ^ Fauna Europaea: Abida Turton 1831
  4. ^ AnimalBase - Abida Turton, 1831
  5. ^ Bas Kokshoorn. Edmund Gittenberger: Phylogeography of the land snail Abida secale (Draparnaud, 1801) (Chondrinidae). Journal of Molluscan Studies, 78: 128-133, 2012 doi : 10.1093 / mollus / eyr043

Web links

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