Camelobaetidius janae Dominique & Thomas, 2001

Boldrini, R., Jacobus, Luke M., Salles, F. F. & Pes, A. M. O., 2013, The adults of Camelobaetidius janae Dominique & Thomas, 2001 and C. yacutinga Nieto, 2003, with a new synonym for C. leentvaari Demoulin, 1966 (Ephemeroptera: Baetidae), Zootaxa 3702 (2), pp. 150-158 : 151-153

Camelobaetidius janae Dominique & Thomas, 2001

( Figs. 1–6 )

Camelobaetidius janae Dominique et al., 2001a: 44 ; Dominique & Thomas 2002: 27; Dominique et al., 2001b: 97; Dominique et al., 2002b: 39; Thomas et al., 2003: 123; Salles et al., 2004a: 5; Salles et al., 2004b: 15; Salles & Serrão 2005: 275; Domínguez et al., 2006: 131; Nieto et al., 2011: 8; Falcão et al., 2011: 528; Boldrini et al., 2012a: 93; Boldrini et al., 2012c: 23.

Diagnoses. Male: 1) anteronotal protuberance pointed ( Fig. 1 ); 2) hind wing with a broadly-based costal process, and a small undulation beyond the costal process ( Figs. 4 a, 4b); 3) abdominal terga of segments III and VI with remarkable reddish medial marks ( Fig. 2 ); 4) posterior margin of subgenital plate convex ( Fig. 5 ); 5) forceps segment I 0.3× length of segment II ( Fig. 5 ); 6) forceps segment III elongate, 2.1× as long as wide ( Fig. 5 ). Female: 1) anteronotal protuberance pointed; 2) abdominal terga of segments III and VI with brown medial mark, lateral margins of segments II–VI light brown ( Fig. 6 ).

Description. Male imago. Antenna: 0.8 mm; body: 3.3–3.7 mm; forewing: 3.2–3.4 mm; hind wing: 0.4–0.5 mm; tibia I: 0.9–1.1mm; tibia II: 0.7 mm; tibia III: 0.6–0.7 mm; cerci broken (n = 3).

Head ( Figs. 1, 2 ) coloration brown; compound eyes black, turbinate portion reddish. Antenna with scape and pedicel light brown, flagellum lighter.

Thorax ( Figs. 1, 2 ) with pro- and mesonotum brown; metanotum dark brown. Posterior scutal protuberance dark brown. Pro, meso and metasternum white washed with brown. Anteronotal protuberance pointed. Metascutellar protuberance reddish brown, posteriorly rounded. Legs. White washed with brown. Tarsal segments I and II of the middle and hind legs with one apical spine. Leg I: tibia 1.6× length of femur; tarsus 0.3× length of femur. Leg II tibia 1.3× length of femur; tarsus 0.3× length of femur. Leg III tibia 1.5× length of femur; tarsus 0.3× length of femur. Forewing hyaline ( Fig. 3 ). Veins light brown, stigmatic area with four cross veins not touching subcostal vein and one cross vein touching subcostal area. Marginal intercalary veins paired; length of forewing about 2.5× width. Hind wing ( Figs. 4 a, 4b) hyaline with two longitudinal veins; costal process rounded located on basal third, with a broadly-based costal process, and a small undulation beyond the costal process..

Abdomen ( Figs. 1, 2 ) with terga white, washed with brown, segments III and VI medially with remarkable reddish marks, posterior margin of segments II and III reddish. Tracheation black. Sterna white washed with brown. On genitalia ( Fig. 5 ), segments of forceps whitish, washed with brown. Forceps segment I 0.3× length of segment II; distance between base of forceps 0.6× distance between lateral margins of forceps. Forceps segment III elongate, 2.1× as long as wide; 0.2× length of segment II. Posterior margin of subgenital plate convex, posteriorly projected.

Female imago. Similar to male. Antenna: 0.5 mm; body: 3.8–4.5 mm; forewing: 3.0– 3.3 mm; hind wing: 0.4 mm; tibia I: 0.6–0.7 mm; tibia II: 0.7–0.8 mm; tibia III: 0.6–0.7 mm; cerci broken (n=2).

Head ( Fig. 6 ) coloration yellowish brown; compound eyes yellowish black. Antenna with scape, pedicel yellowish brown and flagellum whitish.

Thorax ( Fig. 6 ) with yellowish brown nota; pro-, meso- and metasternum whitish. Legs white, washed with brown. Tarsal segment II with one short apical spine. Leg I: tibia 1.6× length of femur; tarsus 0.6× length of femur. Leg II tibia 1.7× length of femur; tarsus 0.3× length of femur. Leg III tibia 1.4× length of femur; tarsus 0.3× length of femur. Forewing hyaline. Veins light brown, stigmatic area with five crossveins, one of them not touching subcostal vein. Marginal intercalary veins paired, except simple veins between ICu1 and ICU2; length of forewing about 2.7× width.

Abdomen ( Fig. 6 ) with terga yellowish brown, segments III and VI with brown mark medially, lateral margins of segments II–VI light brown. Sterna yellowish brown.

Distribution. French Guiana (Dominique et al., 2001a); Venezuela (Nieto et al. 2011). Brazil: Rondônia (Salles & Serrão, 2005); Mato Grosso (Salles et al., 2004a); Roraima (Falcão et al. 2011); Piauí (Boldrini et al. 2012a: 93); Minas Gerais, Espírito Santo (Boldrini et al., 2012c).

Comments. Adults of Camelobaetidius janae have a hind wing shape similar to that of the widespread and sometimes dominant North and Central American species C. warreni (Traver & Edmunds, 1968) . This shape of the hind wing, with a broadly-based costal process and a small undulation beyond it, is unusual among the known adults of Camelobaetidius . The costal process usually is distinctly subtriangular and much more prominent than found in C. warreni and C. janae . Camelobaetidius janae is distinguished from C. warreni by abdominal coloration; C. janae has medial maculae on segments III and VI that are absent from the corresponding segments in C. warreni .

Material examined. One male adult (reared), Brazil, Roraima, Pacaraima, Ereu river, 04°02’02.9’’ N / 61º23’09.5’’ W, 23.iii.2012, Hamada, N., Boldrini, R., Cruz, P.V. leg. (INPA). Two male and two female adults (reared), Brazil, Roraima, Caracaraí, Bem Querer, Branco river, 01°55’46.3’’ N / 61°00’06.9’’ W, 25.iii.2012, Hamada, N., Boldrini, R., Cruz, P.V. leg. (CZNC).

Figures

FIGURES 1 – 6. Adults of Camelobaetidius janae. 1 – 5, male imago; 6, female imago. 1, body (lateral view). 2, body (dorsal view). 3, forewing. 4 a, hind wing. 4 b, hind wing (enlarged). 5, genitalia. 6, body (dorsal view). Abbreviations: I, II, III: forceps segments I, II, III, respectively.