Chondrula

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Chondrula
Three-toothed wolverine snail (Chondrula tridens)

Three-toothed wolverine snail ( Chondrula tridens )

Systematics
Subordination : Land snails (Stylommatophora)
Superfamily : Enoidea
Family : Wolverine snails (Enidae)
Subfamily : Eninae
Tribe : Chondrulini
Genre : Chondrula
Scientific name
Chondrula
Beck , 1837

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

features

The elongated egg-shaped to cylindrical housings are 8 to 25 mm high and 3.5 to 9 mm wide. They have 6.5 to 11 turns with a slightly curved periphery. The mouth is U-shaped, V-shaped, rounded to ovoid, the size varies. The mouth edges can be bent more or less strongly. The points of attachment of the mouth to the previous turn are usually not approximated, but can be connected to one another by a more or less thick whitish layer. The last turn only rises slightly, if at all, just before the edge of the mouth. Up to six teeth protrude into the mouth, but they can also be completely missing. The yellowish to dark brown cases are rarely two-tone, i. H. have darker radial stripes. The surface is smooth or covered with fine strips of growth.

In the male tract of the genital apparatus, the few twisted vas deferens enter the comparatively short epiphallus . A worm-shaped flagellum sits at the point of entry. The small, flat-conical epiphallus caecum sits roughly in the middle of the epiphallus length. The penis and epiphallus are roughly the same length. The penis is heavily thickened at the epiphallus / penis transition. The thickness gradually decreases to about half at the confluence of the penis with the atrium. The penile caecum and penile appendix are absent. The stimulator inside the penis is cone-shaped with a longitudinal groove or umbrella-shaped. The uniform retractor muscle is attached to the proximal half of the penis (towards the epiphallus). In the female tract, the free fallopian tube (oviduct) is roughly the same length as the vagina. The spermathec is moderately long, the stem is tortuous. The bladder comes to rest roughly near the prostate. A moderately long diverticulum branches off just before the bladder.

Geographical distribution

The distribution area of ​​the genus extends over southwest France, Italy, Central Europe, the Balkan Peninsula, Greece and Turkey to the Caucasus, northern Iran and the southern Urals. In the north, the area extends to Lithuania and central Russia.

Taxonomy

The genus Chondrula was established in 1837 by Henrik Henriksen Beck. Type species from the subsequent determination by Herrmannsen in 1847 is Helix tridens Müller, 1774. The genus is the type genus of the tribe Chondrulini Wenz, 1923.

supporting documents

literature

  • Burçin Aşkım Gümüş, Eike Neubert: New taxa of terrestrial molluscs from Turkey (Gastropoda, Pristilomatidae, Enidae, Hygromiidae, Helicidae). ZooKeys, 171: 17-37, 2012 doi : 10.3897 / zookeys.171.2273
  • 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. 228)
  • 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., Planet Poster Ed., Göttingen 2012, ISBN 3-933922-75-5 , ISBN 978-3-933922-75-5 (S. 173)

Individual evidence

  1. ^ Henrik Henriksen Beck: Index molluscorum praesentis aevi musei principis augustissimi Christiani Frederici. Pp. 1–124, Copenhagen, 1837 PDF .
  2. ↑ August Nikolaus Herrmannsen: Indicis generum malacozoorum primordia. Nomina subgenerum, generum, familiarum, tribuum, ordinum, classium; adjectis auctoribus, temporibus, locis systematicis atque literariis, etymis, synonymis. Praetermittuntur Cirripedia, Tunicata et Rhizopoda. Vol. I. I-XXVII, 1-637. Kassel, Fischer, 1846–47 (Fasc.1: 1–104, September 1 1846, Fasc.2: 105–232, December 1 1846, Fasc.3: 233–360, March 1 1847, Fasc.4: 361– 488, May 25 1847, Fasc. 5: 489-637, July 27 1847) online at www.biodiversitylibrary.org (p. 231).
  3. ^ A b Wilhelm Wenz: Gastropoda extramarina tertiaria. In: Carl Diener (Ed.), Fossilium catalogus, 1 Animalium , 21: 1069–1420, Berlin 1923 Online at www.biodiversitylibrary.org (pp. 952–957).

On-line

Web links

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