New species and records for the mayfly families Caenidae, Leptohyphidae and Coryphoridae (Ephemeroptera, Pannota) from Venezuelan Guayana’s Uplands Author Molineri, Carlos Author Grillet, Maria-Eugenia Author Nieto, Carolina Author Dominguez, Eduardo Author Guerrero, Edmundo text Zootaxa 2011 2750 39 50 journal article 10.5281/zenodo.206964 8be3c4b0-eca9-4fa2-b40f-102609149a82 1175-5326 206964 Tricorythopsis volsellus Molineri Tricorythopsis volsellus Molineri 1999 : 294 . Material. One 3 imago (slide 514) from Venezuela , Estado Bolívar, Tarota, N 5° 49' 15" – W 61° 25' 4" , 1324 m , 27/VI/2007 , EG, AMO, CA and MEG cols. Deposited in MLBV . Discussion. T. volsellus was described from imagos of both sexes from Rio Negro (TFA, Venezuela ), Molineri (1999) discussed and illustrated the characters defining this species. Ecology. The specimen was collected along the river margins, at night, and during the rainy season ( June 2007 ). The river was a non shaded, medium size ( 12 m wide; 3rd order) and bed-rock bottom river with acidic waters (pH=5).