Ixinandria Isbruecker & Nijssen, 1979

Raphael Covain & Sonia Fisch-Muller, 2007, The genera of the Neotropical armored catfish subfamily Loricariinae (Siluriformes: Loricariidae): a practical key and synopsis., Zootaxa 1462, pp. 1-40: 30

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Ixinandria Isbruecker & Nijssen, 1979


Ixinandria Isbruecker & Nijssen, 1979  ZBK  .

Type species: Loricaria steinbachi Regan, 1906  ZBK  .

Lectotype: BMNH 1906.5.31: 37, Argentina, Rio Salado drainage at Salta . 

Gender: feminine.

Distribution includes rivers of the Atlantic slope of the Andes in Bolivia and Argentina. According to Gladys Monasterio de Gonzo (pers. comm.), Ixinandria steinbachi  occurs in Salta province in mountainous areas at high altitudes ranging from around 1000 to 2900 meters above sea level. This rheophilic species lives in fast flowing and very oxygenated waters. Its color pattern reflects mimicry with stoned bottoms. Fertilized eggs have been found on the hidden surface of a stone, suggesting that I. steinbachi  could be a cavity spawner. Sexual dimorphism includes hypertrophied odontodes around the head margin and on the pectoral spines of mature males. The phylogenetic position of Ixinandria  ZBK  within Loricariini  remains uncertain. Reis & Cardoso (2001) suggested that Ixinandria  ZBK  could be synonym of Rineloricaria  ZBK  . This hypothesis seems plausible considering the weakness of the diagnostic feature given for Ixinandria  ZBK  , its naked belly, and several species of Rineloricaria  ZBK  from South-East Brasil or Argentina with the belly partly covered such as R. maquinensis  ZBK  , R. aequalicuspis  ZBK  or R. misionera  ZBK  . Nevertheless, the typology of Rineloricaria lima  needs clarification prior to further investigations on the taxonomy of Ixinandria  ZBK  . Two valid species are currently recognized (Ferraris 2003).