Dentectus barbarmatus, a new genus and species of mailed catfish from the Orinoco Basin of Venezuela (Pisces, Siluriformes, Loricariidae)

Dentectus barbarmatus, a new genus and species of mailed catfish of the subfamily Loricariinae, tribe Loricariini, is described from tributaries of the northern margin of the Orinoco River in Venezuela. Morphometric and meristic data of several specimens are presented and illustrations are given. The relationships of the new genus with other genera of the tribe are discussed. It is assigned to the subtribe Planiloricariina, together with Pseudohemiodon Bleeker, 1862, Rhadinoloricaria Isbrücker & Nijssen, 1974, Crossoloricaria Isbrücker, 1979, and Planiloricaria Isbrücker, 1971.