''Jenynsia'' is a
genus of
freshwater
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ...
fishes in the
family Anablepidae. Like ''
Anableps'' species, they are onesided livebearers: some sources indicate that they only mate on one side, right-"handed" males with left-"handed" females and vice versa.
However other sources dispute this. These South American fish are
viviparous.
Distribution
Species of the genus are distributed in the
Río de la Plata Basin and
Atlantic coastal drainages from
Río Negro Province,
Argentina, to the city of
Rio de Janeiro,
Brazil, and in the
Andean drainages of northwest Argentina and southern
Bolivia
, image_flag = Bandera de Bolivia (Estado).svg
, flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center
, flag_alt2 = 7 × 7 square p ...
.
Taxonomy
''Jenynsia'' is the
sister group
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree.
Definition
The expression is most easily illustrated by a cladogram:
Taxon A and t ...
to the genus ''
Anableps'' and both are classified in the subfamily
Anablepinae; together with the genus ''
Oxyzygonectes
The white-eye (''Oxyzygonectes dovii'') is a species of killifish of the family Anablepidae. This species is the only member of its genus, ''Oxyzygonectes'', and the subfamily Oxyzygonectinae.
This fish species is found in Pacific drainages in Ni ...
'' they compose the family Anablepidae.
''Jenynsia'' contains two subgenera. Members of the subgenus ''Plesiojenysia'' Ghedotti, 1998, are distributed in the uplands of southern Brazil. Members of the subgenus ''Jenynsia'' are more widely distributed in southern South America, with one species, ''J. sanctaecatarinae'' also found in the uplands of southern Brazil.
Members of the two subgenera are partially sympatric in southeastern Brazil.
Description
Unlike their cousins ''
Anableps'', their eyes are normal.
''Jenynsia'' species are diagnosable by the possession of an unscaled tubular
gonopodium formed chiefly by the third, sixth, and seventh
anal-fin rays and by the possession of
tricuspid teeth in the outer mandibular series in adults.
The maximum length in these species is up to 12 centimetres (5 in) in females and about 4 cm (2 in) in males.
Species
There are currently 15 recognized species in this genus:
[
* '' Jenynsia alternimaculata'' ( Fowler, 1940)
* '' Jenynsia darwini'' Amorim, 2018
* '' Jenynsia diphyes'' Lucinda, Ghedotti & da Graҫa, 2006]Calviño
Calviño is a Spanish surname. Notable people with the surname include:
* Lucas Calviño (born 1984), Argentine footballer
* María Rosa Calviño de Gómez, Argentine politician
* Nadia Calviño (born 1968), Spanish economist and civil servant
Se ...
& Lobo
Lobo may refer to:
Places
*Lobo, Batangas, a municipality in the Philippines
*Lobo, Texas, a ghost town
*Lobo, Indonesia
*Lobo, Cameroon, a town in Cameroon
*Lobo Hill, near Belchite, Aragon, Spain
* Lobo, Ontario, near London, Ontario, Canada
Pe ...
, 2013[Aguilera, G., Mirande, J.M., Calviño, P.A. & Lobo, L.F. (2013)]
''Jenynsia luxata'', a new species from Northwestern Argentina, with additional observations of ''J. maculata'' Regan and phylogeny of the genus (Cyprinodontiformes: Anablepidae).
''Neotropical Ichthyology, 11 (3): 565-572.''
* '' Jenynsia maculata'' Regan
The family name Regan, along with its cognates O'Regan, O Regan, Reagan, and O'Reagan, is an Anglicized form of the Irish surname Ó Riagáin or Ó Ríogáin, from Ua Riagáin. The meaning is likely to have originated in ancient Gaelic ''ri' ...
, 1906
* ''Jenynsia multidentata
''Jenynsia multidentata'' is a species of killifish from the Family (biology), family Anablepidae. It is a Viviparity, viviparous, Demersal fish, benthopelagic species in the genus Onesided livebearer, ''Jenynsia''. They are onesided livebearers ...
'' ( Jenyns, 1842) (Rio de la Plata onesided livebearer)
* '' Jenynsia obscura'' ( Weyenbergh ( de), 1877)
* '' Jenynsia onca'' Lucinda, R. E. dos Reis & Quevedo, 2002
* '' Jenynsia sanctaecatarinae'' Ghedotti & S. H. Weitzman, 1996
*'' Jenynsia sulfurica''
References
{{Taxonbar, from=Q5299277
Anablepidae
Viviparous fish
Freshwater fish of South America
Freshwater fish of Argentina
Fish of Bolivia
Freshwater fish of Brazil
Taxa named by Albert Günther