Onesided livebearer
Jenynsia multidentata
The Linienkärpflinge ( Jenynsia ) are a genus of South American freshwater fishes from the order of Zahnkärpflinge ( Cyprinodontiformes ). The circulation area ranges from coastal rivers of the Argentine province of Río Negro over the basin of the Río de la Plata and the coming of the Andean rivers of northwestern Argentina and southern Bolivia to Rio de Janeiro in southeastern Brazil.
Features
Linienkärpflinge have a typical, more or less elongated Zahnkärpflingsgestalt with short dorsal and anal fin and 4 to 8.6 cm long. They are viviparous and have internal fertilization. For this, the males have a gonopodium, which develops from an annular Hautwulst surrounding the anal fin. With an increasing growth in the Gonopodium finally surrounds the anal fin completely. The gonopodium can only move left or right. The genital opening of the female is partially covered by a large scale in such a way that it opens either to the left or right. Males with rotating to the left Gonopodium can propagate only with females, their genital opening facing to the right and vice versa.
Inside systematics
Jenynsia is largely allopatric in two monotypic subgenera and 14, ie divided into different areas of distribution occurring species.
- Subgenus Jenynsia; widely distributed in southern South America. Jenynsia alternimaculata ( Fowler, 1940)
- Jenynsia lineata ( Jenyns, 1842) ( type species )
- Jenynsia luxata Aguilera et al., 2013
- Jenynsia maculata Regan, 1906
- Jenynsia multidentata ( Jenyns, 1842)
- Jenynsia obscura ( Weyenbergh, 1877)
- Jenynsia onca Lucinda, Rice & Quevedo, 2002
- Jenynsia sanctaecatarinae Ghedotti & Weitzman, 1996
- Jenynsia tucumana Aguilera & Mirande, 2005
- Jenynsia diphyes Lucinda, Ghedotti & Graça, 2006
- Jenynsia eigenmanni ( Haseman, 1911)
- Jenynsia eirmostigma Ghedotti & Weitzman, 1995
- Jenynsia unitaenia Ghedotti & Weitzman, 1995
- Jenynsia weitzmani Ghedotti, Meisner & Lucinda, 2001