Line parsons

Line parsons
Jenynsia multidentata
Systematics
Ovalentaria Superordinate : Earfish relatives (Atherinomorphae) Order : Toothpies (Cyprinodontiformes) Subordination : Cyprinodontoidei Family : Anablepidae Genre : Line parsons
Scientific name
Jenynsia
Günther , 1866

The line fish ( Jenynsia ) are a genus of South American freshwater fish from the order of the tooth fish (Cyprinodontiformes). The distribution area extends from the coastal rivers of the Argentine province of Río Negro over the river basin of the Río de la Plata and the rivers of northwestern Argentina and southern Bolivia coming from the Andes to Rio de Janeiro in southeastern Brazil.

features

Line fish have a typical, more or less elongated tooth fish shape with short dorsal and anal fins and are 4 to 8.6 cm long. They are viviparous and have internal fertilization. The males also have a gonopodium that develops from a ring-shaped skin bulge that surrounds the anal fin . As it grows, the gonopodium finally completely encloses the anal fin. The gonopodium can only be moved to the right or left. 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 to the right. Males with a left-turning gonopodium can only reproduce with females whose genital opening points to the right and vice versa.

species

Jenynsia is divided into two monotypic subgenus and 16 mostly allopatric , i.e. H. species occurring in different distribution areas are divided.

• Subgenus Jenynsia ; widespread in southern South America.
  • Jenynsia alternimaculata ( Fowler , 1940)
  • Jenynsia darwini Fasura Amorim, 2018
  • 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, Reis & Quevedo, 2002
  • Jenynsia sanctaecatarinae Ghedotti & Weitzman, 1996
  • Jenynsia sulfurica Aguilera et al., 2019
  • Jenynsia tucumana Aguilera & Mirande, 2005
• Subgenus Plesiojenynsia Ghedotti, 1998 ; widespread in the southern Brazilian highlands.
  • 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

Individual evidence

1. ↑ ^{a b} Michael J. Ghedotti, Meisner, Amy Downing; Lucinda, Paulo HF: New Species of Jenynsia (Teleostei: Cyprinodontiformes) from Southern Brazil and Its Phylogenetic Relationships . In: Copeia . 2001, No. 3, 2001, ISSN  0045-8511 , pp. 726-736. doi : 10.1643 / 0045-8511 (2001) 001 [0726: NSOJTC] 2.0.CO; 2 .
2. ↑ Günther Sterba : Freshwater fish of the world. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 , pp. 580-581.
3. ↑ Jenynsia on Fishbase.org (English)

Web links

Commons : Jenynsia  - collection of images, videos and audio files