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A New Genus and Species of a Minute Suckermouth Armored Catfish

Nannoplecostomus eleonorae

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Posted 30 December 2012 - 04:26 PM

Copeia 2012, No. 4, 637–647
A New Genus and Species of a Minute Suckermouth Armored Catfish (Siluriformes: Loricariidae) from the Rio Tocantins Drainage, Central Brazil: The Smallest Known Loricariid Catfish
Alexandre C. Ribeiro, Fla´vio C. T. Lima, and Edson H. L. Pereira
Nannoplecostomus eleonorae, a new genus and species of a miniature suckermouth armored catfish, is described based on
specimens collected from the karst region of Sa˜o Domingos, upper Rio Tocantins basin, Goia´ s State, central Brazil. The
new genus and species can be diagnosed among loricariids by presenting a unique reductive pattern of lateral dermal
plates, with most of the body covered by only three series of plates (viz., dorsal, mid-ventral, and ventral). Based on the
available published phylogenetic studies for the family, we provisionally consider Nannoplecostomus eleonorae as being
an incertae sedis taxon within Loricariidae. Achieving a maximum standard length of 22.2 mm SL, Nannoplecostomus
eleonorae is the smallest known loricariid catfish, and a list of the remaining smallest loricariids is provided.


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