New record of Rineloricaria daraha Rapp Py-Daniel & Fichberg, 2008 from Rio Paca, upper Rio Negro, Amazon River basin

Abstract

The geographic distribution of a catfish of the family Loricariidae, Rineloricaria daraha Rapp Py-Daniel and Fichberg, 2008, which was only known from its type locality within the Rio Daraá, Brazil, is extended here within the Rio Negro basin to Colombia. This new record from Colombian territory is more than 700 km apart, in hydrological distance, from previously recorded locality in the Rio Daraá. Illustrations of diagnostic characters and morphometrics are provided based on Colombian specimens.

A new species of rheophilic armored catfish of Rineloricaria (Siluriformes: Loricariidae) from the Vaupés River, Amazonas basin, Colombia

“…Of those species, one was recently recorded for Colombia ( R . daraha by Bogotá‐Gregory et al, 2016), and another was recently described ( R . jurupari , by Londoño‐Burbano & Urbano‐Bonilla, 2018), summing up the species described here, that is three species recorded in less than 10 years for the same basin (i.e., Vaupés River).…”

“…There is also an important similarity between both species, and that is related to their rheophilic nature and the environments in which they are found. Both appear to be adapted to turbulent waters and are capable of supporting strong currents, which contain grazeable aquatic plants, algae, and invertebrates found in the holes between and on the surface of waterfall rocks (Bogotá‐Gregory et al, 2016) as resources for the species. These characteristics seem to be reflected in the morphology of both species, mainly regarding head morphology.…”

“…seems to be exclusive to the rapids of the Vaupés River, and from its type locality we recorded it to occur ~138 km upstream in the same type of environments (Figure 3). Another endemic species is R. daraha ; although with a greater distribution in the basin (>700 km), it has only been recorded in rheophilic environments, that is, in the Cachiveras‐Cachoeiras of the Vaupés River in Brazil and Colombia (Bogotá‐Gregory et al, 2016; Rapp Py‐Daniel & Fichberg, 2008). In the Amazon basin, areas of endemism have been identified (Jézéquel, Tedesco, Darwall, et al, 2020b) as basic units of analysis in historical biogeography (Morrone, 2014) and useful in conservation biology (Löwenberg‐Neto & de Carvalho, 2004).…”

“…being the sixth valid species recorded for the region. Of those species, one was recently recorded for Colombia (R. daraha byBogotá-Gregory et al, 2016), and another was recently described (R. jurupari, by Londoño-Burbano & Urbano-Bonilla, 2018), summing up the species described here, that is three species recorded in less than 10 years for the same basin (i.e., Vaupés River). Furthermore, R. lanceolata is a species currently recognized as widespread along the Amazonas River basin (including the upper, middle, and lower portions of the basin, in localities of Colombia, Bolivia, Brazil, and Peru); however, from this wide distribution, a cryptic component could be present in the species.…”