Camelobaetidius Demoulin 1966

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 : 4

Camelobaetidius Demoulin 1966

The genus Camelobaetidius , originally described by Demoulin in 1966, is one of the most species rich genera in Neotropics ( Domínguez et al. 2006). In Venezuela, only Camelobaetidius alcyoneus (Traver) was described ( Chacón et al. 2009). Here, four species are reported from Venezuela.

Key to the nymphs of Venezuelan Camelobaetidius (modified from Domínguez et al. 2006)

1 Femur I with a tubercle on ventral margin at base ( Fig. 43 ); apical margin of tibia with an excavation and a patch of short spines ( Fig. 43 )................................................................. Camelobaetidius leentvaari Femur I without tubercles on ventral margin ( Fig. 53 ); apical margin of tibia without excavation or patch of spines........ 2

2 (1) Coxal gills absent ( Fig. 33 ); maxillae with segment II of palpi bifid ( Fig. 31 ).................... Camelobaetidius janae Coxal gills present ( Fig. 53 ); maxillae with segment II of palpi simple ( Fig. 21 )................................... 3

3 (2) Terminal filament short, subequal in length to abdominal segment X ( Fig. 3 ); segment II of labial palpi rounded medially ( Figs. 22 a and b); tarsal claws with 30–31 denticles ( Fig. 24 )....................................... Camelobaetidius billi Terminal filament long, subequal in length to cerci ( Fig. 5 ); segment II of labial palpi with a bluntly rounded distomedial projection ( Fig. 52 ); tarsal claws with 25 to 28 denticles ( Fig. 54 )............................ Camelobaetidius mathuriae

Figures

FIGURES 37 – 46. Camelobaetidius leentvari. Nymph. Mouthparts (Figs. 37 – 42): 37, labrum, left d. v., right v. v.; 38, left mandible v. v.; 39, right mandible v. v.; 40, hypopharynx v. v.; 41, maxilla v. v.; 42 a, labium, left v. v., right d. v.; 42 b, labial palp. 43, leg I; 44, tarsal claw I. 45, posterior margin of tergum IV. 46, paraproct.

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.

FIGURES 27 – 36. Camelobaetidius janae. Nymph. Mouthparts (Figs. 27 – 32): 27, labrum, left d. v., right v. v.; 28, left mandible v. v.; 29, right mandible v. v.; 30, hypopharynx v. v.; 31, maxilla v. v.; 32, labium, left v. v., right d. v. 33, leg I; 34, tarsal claw I. 35, posterior margin of tergum IV. 36, paraproct.

FIGURES 17 – 26. Camelobaetidius billi. Nymph. Mouthparts (Figs. 17 – 22): 17 a, labrum, left d. v., right v. v.; 17 b, labrum, anterior margin; 18, left mandible v. v.; 19, right mandible v. v.; 20, hypopharynx v. v.; 21, maxilla v. v.; 22 a, labium, left v. v., right d. v.; 22 b, labial palp. 23, leg I; 24, tarsal claw I. 25, posterior margin of tergum IV. 26, paraproct.

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