Pseudoxiphophorus
| Pseudoxiphophorus | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Zweifleckkärpfling ( Pseudoxiphophorus bimaculatus ) |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Pseudoxiphophorus | ||||||||||||
| Bleeker , 1860 |
Pseudoxiphophorus is a genus of livebearing toothcarps (Poeciliinae). The fish are found in Central America in Mexico ( Veracruz , Tabasco , Yucatán ), Belize , Guatemala , Honduras and Nicaragua .
features
Pseudoxiphophorus species reach lengths between 4 cm and 7 cm (males) and between 6 cm and 15 cm (females). They are elongated fish of greenish, grayish-olive to brownish color. Characteristic of the genus is a black spot on the base of the caudal fin and another black spot above each pectoral fin. The sexual dimorphism is low. Females and males largely correspond in body shape and color, with males the black portion of the coloring is usually more pronounced. Especially at night the males become very dark from the middle of the body to the tail fin end. The male gonopodium is very long.
Way of life
Pseudoxiphophorus species live in weedy, calmly flowing waters of the lowlands as well as in mountain streams. They feed on invertebrates and vegetable foods.
Systematics
Pseudoxiphophorus has long been considered a subgenus of Heterandria . However, recent research has shown that the two genera are not closely related. Nine species have been described so far:
- Pseudoxiphophorus anetoi (Rosen & Bailey, 1979)
- Pseudoxiphophorus attenuata (Rosen & Bailey, 1979)
- Zweifleckkärpfling ( Pseudoxiphophorus bimaculatus ) (Heckel, 1848)
- Pseudoxiphophorus cataractae (Rosen, 1979)
- Pseudoxiphophorus dirempta (Rosen, 1979)
- Reticulated caravian ( Pseudoxiphophorus jonesii ) Günther, 1874
- Pseudoxiphophorus litoperas (Rosen & Bailey, 1979)
- Pseudoxiphophorus obliquus (Rosen, 1979)
- Pseudoxiphophorus tuxtlaensis (McEachran & Dewitt, 2008)
Individual evidence
- ↑ Alfy Morales-Cazan, James S. Albert: Monophyly of Heterandriini (Teleostei: Poeciliidae) revisited: a critical review of the data. In: Neotropical Ichthyology 10, No. 1, 2012, pp. 19-44.
literature
- Günther Sterba (Ed.), Gert Brückner: Encyclopedia of Aquaristics and Special Ichthyology. Neumann-Neudamm, Melsungen u. a. 1978, ISBN 3-7888-0252-9 .
- Dieter Gentzsch: Pseudoxiphophorus. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 835.
- Manfred K. Meyer, Lothar Wischnath, Wolfgang Foerster: Livebearers ornamental fish: Species of the world. Mergus Verlag für Natur- und Heimtierkunde Baensch, Melle 1985, ISBN 3-88244-006-6 .
Web links
- Pseudoxiphophorus on Fishbase.org (English)