Scolichthys

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Scolichthys
Systematics
Superordinate : Earfish relatives (Atherinomorphae)
Order : Toothpies (Cyprinodontiformes)
Subordination : Cyprinodontoidei
Family : Viviparous toothcarps (Poeciliidae)
Subfamily : Live-bearing toothcarps (Poeciliinae)
Genre : Scolichthys
Scientific name
Scolichthys
Rosen , 1967

Scolichthys is a genus of viviparous toothcarps comprising two species. The distribution of the species is limited to a few upper rivers in the Guatemalan Alta Verapaz department.

features

They are representatives of the viviparous toothcarps that remain small. The larger species, Scolichthys greenwayi , can reach a length of up to 5 cm, Scolichthys iota grows to a maximum of 3.5 cm. In both species the males remain significantly smaller than females. A thorn-shaped appendage at the tip of the gonopodium is typical of the genus .

distribution

Both species have so far only been detected in Guatemala in the Alta Verapaz department. Scolichthys greenwayi inhabits the upper reaches of the Río Chixoy . Scolichthys iota is only known from the Río Chajmayic .

Systematics

The fish resemble the members of the tribe Cnesterodontini with the genera Cnesterodon , Phalloceros and Phallotorynus , which are only known from southeastern South America. Because of this geographical isolation, Rosen placed the genus in its own tribe Scolichthyini in its first description . Molecular genetic studies suggest that Scolichthys is closely related to Carlhubbsia .

species

Individual evidence

  1. ↑ Manfred K. Meyer, Lothar Wischnath, Wolfgang Foerster: Livebearers Zierfische: Species of the world . 1st edition. Mergus, Verlag für Natur- und Heimtierkunde, Melle 1985, ISBN 3-88244-006-6 , p. 351-354 .
  2. ↑ Donn Eric Rosen: New poeciliid fishes from Guatemala, with comments on the origins of some South and Central American forms . In: American Museum novitates . tape 2303 . New York 1967 ( PDF ).
  3. ↑ Tomas Hrbek, Jens Seckinger, Axel Meyer: A phylogenetic and biogeographic perspective on the evolution of poeciliid fishes . In: Molecular Phylogenetics and Evolution . tape 43 , 2007, p. 968-998 , doi : 10.1016 / j.ympev.2006.06.009 .

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