Ergasilus colomesus (Copepoda: Ergasilidae) parasitizing gills of Colomesus asellus(Tetraodontiformes: Tetraodontidae) in the western Brazilian Amazon.

Records about Ergasilus colomesus and its interaction with the host fish are scarce. There is only a report describing this species from specimens collected from the gills of Colomelus asellus, in the State of Amazonas, Brazil. In this sense, this is the first record of E.

Contributions to the taxonomy and distribution of the genus Mesabolivar in southern South America (Araneae: Pholcidae).

Two new species of Mesabolivar González-Sponga are described, M. charrua sp. nov.