Camelobaetidius mathuriae Dominique & Thomas

Nieto, Carolina, Grillet, Maria-Eugenia, Domínguez, Eduardo, Molineri, Carlos & Guerrero, Edmundo, 2011, The Family Baetidae (Insecta: Ephemeroptera) from Venezuelan Guayana’s Uplands, Zootaxa 2808, pp. 1-17 : 11

Camelobaetidius mathuriae Dominique & Thomas in Dominique et al. 2001

( Figs. 5 , 47–56 )

Taxonomy. This species, described based on nymphs, can be distinguished from the other species of the genus by the following combination of characters: 1) labrum with 2 subapical setae near midline and 3–4 setae near lateral margin ( Fig. 47 a), apical margin with bipectinate setae ( Fig. 47 b); 2) left mandible without setae between prostheca and mola ( Fig. 48 ), right mandible with setae between prostheca and mola ( Fig. 49 ); 3) lingua slightly longer than superlinguae ( Fig. 50 ); 4) maxillary palpi subequal in length to galea-lacinia, segment II with a medial projection ( Fig. 51 ); 5) segment II of labial palpi with a bluntly rounded distomedial projection ( Fig. 52 ); 6) coxal gills short ( Fig. 53 ); 7) tarsal claws with 24–28 denticles ( Fig. 54 ); 8) posterior margin of terga with rounded projections; 9) paraprocts as in Fig. 56 ; 10) terminal filament subequal in length to cerci.

Distribution. Colombia and Venezuela.

Material examined. Nine nymphs: Maremán-Parú river, 5º 44´N, 61º24´W, 1308 m, 27/ 6/ 2007, EG, AMO, CA and MEG cols.; one nymph, same locality, 19/ 3/ 2006, EG, AMO, and MEG cols. Seventeen nymphs: Tarotá river, 5º 49´N, 61º 25´W, 1324 m, 28/ 6/ 2007, EG, AMO, CA and MEG cols. Three nymphs: Kavanayén stream, 5º 37´N, 61º 44´W, 1355, 21 / 11/ 2005, EG, AMO, CA and MEG cols. One nymph: Kauí stream, 5º 28´N, 61º16´W, 1196 m, 24/ 11/ 2005, EG, AMO, CA and MEG cols. One nymph: Pacheco river, 5º 10´N, 61º 29´W, 21/3/ 2006, EG, AMO, and MEG cols. One nymph: small stream close to Pacheco river, 5º 12´N, 61º 5´W, 24/11/ 2005, EG, AMO, CA and MEG cols. Two nymphs: Aponwao river, 5º 51´N, 61º 27´W, 1340 m, 20/ 11/ 2005, EG, AMO, CA and MEG cols. Material housed at IML except 5 nymphs housed at MLBV.

Figures

FIGURES 2 – 7. Nymphs, dorsal habitus. 2, Baetodes proiectus. 3, Camelobaetidius billi. 4, Camelobaetidius leentvaari. 5, Camelobaetidius mathuriae. 6, Harpagobaetis gulosus. 7, Spiritiops silvudus.

FIGURES 47 – 56. Camelobaetidius mathuriae. Nymph. Mouthparts (Figs. 47 – 52): 47 a, labrum, left d. v., right v. v.; 47 b, labrum, anterior margin; 48, left mandible v. v.; 49, right mandible v. v.; 50, hypopharynx v. v.; 51, maxilla v. v.; 52, labium, left v. v., right d. v. 53, leg I; 54, tarsal claw I. 55, posterior margin of tergum IV. 56, paraproct.