Plectopyloidea

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Plectopyloidea
Sculptaria sculpturata

Sculptaria sculpturata

Systematics
Class : Snails (gastropoda)
Subclass : Orthogastropoda
Superordinate : Heterobranchia
Order : Lung snails (pulmonata)
Subordination : Land snails (Stylommatophora)
Superfamily : Plectopyloidea
Scientific name
Plectopyloidea
Moellendorff , 1898

The plectopyloidea are a superfamily of snails from the suborder of land snails (Stylommatophora). The representatives of the superfamily are native to South Asia and Southeast Asia. The oldest fossil representatives come from the Eocene of southern China ( Hebei ).

features

The casings are right or left-handed and relatively small. They are strongly flattened to almost flat. The mouth is quite complex with teeth, bent and wavy mouth edges. The jaw is relatively thin and striped vertically. It can also have a median projection. In the hermaphroditic genital apparatus, the penis has a honeycomb-like structure on the inner wall, which consists of nodes. An epiphallus can be present or absent. The flagellum, on the other hand, is always rudimentary or absent entirely. The spermatic duct (vas deferens) does not lie against the penis. The stem of the spermathec is relatively long and is not or only slightly broadened at the base.

Geographical distribution and way of life

The plectopyloidea are common in Tibet, Nepal, India and Sri Lanka, in Southeast Asia (Myanmar, Laos, Vietnam, China and southern Japan (Ryukyu Islands)) and in southwestern Africa.

Systematics

The superfamily Plectopyloidea is divided by Schileyko (1999) into two families (Corillidae and Plectopylidae), Bouchet and Rocroi (2005) assign three families.

The family Sculptariidae is placed by Schileyko (1999) to the superfamily Acavoidea .

swell

Individual evidence

  1. ↑ Yu, W. Pan, Hz .: Eocene non-marine Gastropoda from Zhuo Xian, Hebei. Bulletin of Nanjing Institute of Geology and Palaeontology, 4: 189-212, Nanjing 1982 ISSN  0253-4983

literature

  • Philippe Bouchet & Jean-Pierre Rocroi: Part 2. Working classification of the Gastropoda . Malacologia, 47: 239-283, Ann Arbor 2005 ISSN  0076-2997
  • Anatolij A. Schileyko: Treatise on Recent terrestrial pulmonate molluscs, Part 4 Draparnaudiidae, Caryodidae, Macrocylcidae, Acavidae, Clavatoridae, Dorcasiidae, Sculptariidae, Corillidae, Plectopylidae, Megalobulimidae, Achatinidaocheilidae. Ruthenica, Supplement 2 (4): 437-564, Moscow 1999 ISSN  0136-0027

Web links

Commons : Plectopyloidea  - collection of pictures, videos and audio files