A new species of Pimelodella is described from western Andean tributaries of the Orinoco River basin. The new species differs from all congeners by a unique set of characters that includes long maxillary barbel, surpassing the dorsal lobe of the caudal fin; relatively short adipose fin (32.8–36.4 of SL); 40–42 total vertebrae; posterior margin of pectoral-fin spine with 12–18 retrorse dentations along basal two thirds; laterosensory canal foramina of dentary and preopercle large and externally conspicuous; a brown faint and narrow midlateral stripe extending from the pseudotympanum, fading posteriorly along the caudal peduncle, and ending as a spot at the caudal-fin base; and dorsal-fin base darkly pigmented, from spinelet to posteriormost interradial membrane. Taxonomic status of P. pallida and presence of P. cruxenti in Colombia are also discussed. 

We recorded Pimelodella bockmanni and P. serrata for the first time for Colombia, based on specimens collected in tributaries from the main channel of the Amazonas River, in the so-called Trapecio Amazónico, in the southernmost region of this country. We also present morphometric, meristic, and osteological data of the examined material, and provide a complementary morphological description of the poorly known P. serrata, a species known only from the Madeira River drainage in Bolivia and Brazil.

Presentamos el conjunto de datos de la odonatofauna del campus Barcelona de la Universidad de los Llanos, cuyos especímenes se encuentran depositados en la colección entomológica del Museo de Historia Natural Unillanos – MHNU-E. En total, se registran 424 ejemplares, agrupados en 7 familias, 31 géneros y 61 especies, de las cuales 11 especies son registros nuevos para el departamento del Meta. Este estudio aporta evidencia de los altos niveles de diversidad que posee el campus Barcelona, a pesar de las diferentes actividades antrópicas que se llevan a cabo, surgiendo la necesidad de implementar esta información en las políticas de conservación ambiental de la Universidad de los Llanos.