Delturinae

The Delturinae are the youngest of the six subfamilies of armored catfish ( Loricariidae ). The subfamily has been described only in 2006 by Rice, Pereira & Armbruster and includes only two genera, Delturus and Hemipsilichthys. Both are found in the states of Bahia, Minas Gerais, Espírito Santo and Rio de Janeiro in southeastern Brazil exclusively. The distribution area includes the coastal rivers south of the current territory of the São Francisco River to the Rio Perequê Açu, which opens in Paraty -Mirim into the sea.

Features

The types of Delturinae be from 9.0 to 23.5 cm long and have a typical pleco shape with an elongated, flattened body and a flat, provided with a suction mouth head. Autapomorphies that diagnose the genus, are keel -like elevations on all bone plates between dorsal and adipose fin and the bicuspid, approximately symmetrical teeth.

Outer systematics

The Delturinae are, apart from the most basal genus lithogenic, the sister group of all other armored catfish. The systematic position illustrated by the following cladogram:

Other subfamilies of the Loricariidae

Delturinae

Lithogeninae

Genera and species

• Delturus Egenmann & Eigenmann, 1889 Delturus angulicauda ( Steindachner, 1877)
• Delturus brevis Rice & Pereira, 2006
• Delturus carinotus (La Monte, 1933)
• Delturus parahybae Eigenmann & Eigenmann, 1889

• Hemipsilichthys gobio ( Lütken, 1874)
• Hemipsilichthys Nimius Pereira, rice, Souza & Lazzarotto, 2003
• Hemipsilichthys papillatus Pereira, Oliveira & Oyakawa, 2000