A new species of plec has been described and placed in the resurrected genus Pareiorhaphis.
Edson Lopes Pereira described the new species of loricariid as Pareiorhaphis parmula in a paper in the journal Neotropical Ichthyology.
The catfish, which is a member of the Neoplecostominae subfamily, was collected from the headwaters of the rio Iguacu basin in the State of Parana in southern Brazil.
In the paper Lopes Pereira reshuffles the group and moves a number of plecs from the Hemipsilichthys genus to Pareiorhaphis, due to some complicated problems in the taxonomy of the group, and with the related Isbrueckerichthys plecs.
Lopes Pereira says: \"[Pareiorhaphis parmula] is diagnosed from other Pareiorhaphis species by having one small plate on each side of the pectoral girdle, just posterior to the gill opening and the club-shaped pectoral-fin spine, broadening from base to tip in adult males.
\"All species formerly included in Hemipsilichthys except H. gobio, H. papillatus, and H. nimius are transferred to the genus Pareiorhaphis, which is resurrected from the synonymy of Hemipsilichthys.\"
For more details see the paper: Pereira, EHL, 2005. Resurrection of Pareiorhaphis Miranda Ribeiro, 1918 (Teleostei: Siluriformes: Loricariidae), and description of a new species from the Rio Iguacu basin, Brazil. Neotropical Ichthyology 3: 271-276.