Jaminia

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Jaminia
Four-toothed wolverine snail (Jaminia quadridens)

Four-toothed wolverine snail ( Jaminia quadridens )

Systematics
Subordination : Land snails (Stylommatophora)
Superfamily : Enoidea
Family : Wolverine snails (Enidae)
Subfamily : Eninae
Tribe : Enini
Genre : Jaminia
Scientific name
Jaminia
Risso , 1826

Jaminia is a genus of the family of wolverines (Enidae) from the suborder of land snails (Stylommatophora).

features

The cylindrical-conical housings are left-handed; they are 7 to 16 mm high and 2.5 to 4.5 mm wide. They have 7.5 to 10 turns. The embryonic and juvenile coils are moderately arched on the periphery, the later coils only very slightly arched. The seams are accordingly moderately deep in the upper part of the case and very shallow in the lower part. The embryonic convolutions are smooth, the postembryonic convolutions are also smooth, but with a fine, weak streaking of growth. The mouth is somewhat distorted U-shaped, the edge of the mouth is bent outwards and thickened like a callous. The mouth is reinforced with four teeth, two columellar teeth, a parietal and a palatal tooth.

In the sexual apparatus, the spermatic duct (vas deferens) separates early from the egg duct (sperm duct). It is thin, slightly puckered and comparatively short. It opens apically into the very long epiphallus . A short, conical blind sac (flagellum) is formed at the transition from the spermatic duct to the epiphallus. The epiphallus is relatively thin, only swollen once over a short stretch in the lower half. The actual penis is very short, but the penile appendix is ​​very long, with a long and thick lower part, a short part with less thickness, a very thin middle part and a club-shaped, thickened end part. In the female genital tract, the free fallopian tube is very long and the vagina is very short. The stem of the spermathec is quite short, the small bladder comes to rest at the level of the prostate. A long diverticulum branches off just before the bladder.

Geographical distribution

The distribution area of ​​the genus extends from Spain in the west to the Caucasus in the east. In the north the distribution area extends to France, Luxembourg, southern Germany, Switzerland, Austria, Poland, in the south to the Middle East.

Taxonomy

The taxon was established by Antoine Risso in 1826 . The type species is Jaminia heterostropha Risso, 1826, a more recent synonym of Helix quadridens Müller, 1774. Jaminia is the type genus of the subfamily Jaminiinae Hesse, 1933, but is now considered a synonym of Eninae Woodward, 1903.

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
  • Francisco W. Welter-Schultes: European non-marine molluscs, a guide for species identification = identification book for European land and freshwater mollusks. A1-A3 p., 679 p., Q1-Q78 p., Planet Poster Ed., Göttingen 2012, ISBN 3-933922-75-5 , ISBN 978-3-933922-75-5 (p. 132)

Individual evidence

  1. ^ Antonie Risso: Histoire naturelle des principales productions de l'Europe méridionale et particulièrement de celles des environs de Nice et des Alpes Maritimes. Tome quatrième. S. I-VII, 1-439, Paris, Levrault 1826. [1] (p. 889)
  2. ↑ Fauna Europaea

On-line

Web links

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