Cloeodes opacus Nieto & Richard

Nieto, Carolina & Emmerich, Daniel, 2011, Three new species of the genus Cloeodes Traver (Ephemeroptera: Baetidae) from Uruguay, Zootaxa 2996, pp. 57-65 : 63

Cloeodes opacus Nieto & Richard

Cloeodes opacus Nieto & Richard, 2008: 13

Diagnosis. Cloeodes opacus can be distinguished from the other species of the genus by the following combination of characters: 1) hind wing pads present; 2) segment III of labial palpi subquadrangular ( Nieto & Richard, 2008: Fig. 46); 3) dorsal margin of femora with a row of blunt spines, apically with a subquadrangular projection and two blunt spines( Nieto & Richard, 2008: Fig. 48); 4) abdominal color pattern dark brown with segments I–IX with medial yellow markings as in Nieto & Richard, 2008: Fig. 43, segment X brown; 5) caudal filaments with flattened setae basally sclerotized, cerci with long spines toward external margin every two segments, terminal filament with long spines toward midline dorsally and ventrally every two segments.

Material. One nymph: URUGUAY, Rivera, Mina de los Corrales, Arroyo Corrales, S 31º 34´34´´, W 55º 27´58´´, 135m, 19/ 2/ 2008, Emmerich & Molineri colls. Two nymphs: Treinta Tres, R7, km 279, Arroyo La Yeguada, S 32º 57´34´´, W 54º 59´11´´, 232m, 21/ 2/ 2008, Emmerich & Molineri colls. One nymph: Rivera, Santa Ernestina, R. 29, cerca Mina Corrales , Arroyo sin nombre, S 31º 32' 23.8" W 55º 33' 42", 146m, 19/2/2008, D. Emmerich & C. Molineri colls. Twenty-two nymphs: Rocha, Tahona, Finca Sr. Fernández, Cascada de los Helechos, S 34º 20’ 49.5’’ W 54º 25’ 40.8’’, 122m, 23/ 3/ 2010, D. Emmerich & C. Molineri colls. Seventeen nymphs: Treinta y Tres, Quebrada de los Cuervos, Arroyo Yerbal Chico, S 32º 55’ 35.2’’, W 54º 27’ 39.6’’, 78 m, 25/ 3/10, D. Emmerich & C. Molineri colls.