Tricorythodes

Molineri, Carlos, Grillet, Maria-Eugenia, Nieto, Carolina, Dominguez, Eduardo & Guerrero, Edmundo, 2011, New species and records for the mayfly families Caenidae, Leptohyphidae and Coryphoridae (Ephemeroptera, Pannota) from Venezuelan Guayana’s Uplands, Zootaxa 2750, pp. 39-50 : 49

Tricorythodes sp.

Material. Venezuela, Estado Bolívar: 1 3 and 6 Ƥ imagos from Mareman-Parú, N 5° 44' 49" – W 61° 24' 6", 1308 m, 26/VI/2007, EG, AMO, CA and MEG cols. ( MLBV); 7 3 imagos same data except date 28/VI/2007 ( MLBV); 7 Ƥ imagos from Kaku-Parú, N 4° 54' 0" – W 61° 5' 25", 913 m, 29/VI/2007, EG, AMO, CA and MEG cols. ( IML); 20 3 imagos same data except date 28/VI/2007 ( IML); 6 3 imagos from Tarotá, N 5° 49' 15" – W 61° 25' 4", 1324 m, 27/VI/2007, EG, AMO, CA and MEG cols. ( MLBV).

Discussion. As the nymphal characters are necessary to correctly diagnose and describe species in this genus, we prefer not to erect a new species for this material until the immature stages could be known.

Ecology. Imagos were collected along the river margins ( Fig. 25 ), at night, and during the rainy season (June 2007). Rivers were uncovered or partially shaded (Kaku-Parú), with acidic waters (pH=5). They were small to medium size streams (17–30 m wide; 2nd–3rd order), with bottoms mainly composed of bed-rock and gravels (Kaku-Parú).

Figures

FIGURES 23 – 26. Study sites: 23, Kaku Parú; 24, Kavanayén; 25, Mareman Parú; 26, Aponwao.