Campsurus molinai, Molineri, C., Salles, F. F. & Emmerich, D., 2015

Molineri, C., Salles, F. F. & Emmerich, D., 2015, Revision of Campsurus violaceus species group (Ephemeroptera: Polymitarcyidae) with new synonymies and nomina dubia in Campsurus Eaton, 1868, Zootaxa 3920 (1), pp. 51-68 : 64

Campsurus molinai sp. nov.

( Figs. 38−40 )

Type material. Holotype male imago from Bolivia, Beni, La Granja lake, 2.v.2005, C. Molina col. ( UMSA). Paratype male imago (slide IBN344CM), same data as holotype (IBN).

Distribution. Bolivia (Beni).

Etymology. The species is dedicated to Dr. Carlos Molina, Bolivian limnologist that collected and kindly offered the material of the species.

Diagnosis. 1) pedestals stout, subquadrate, inner distal corner larger and roundly expanded, outer corner thinner and acute ( Figs. 38−40 ); 2) penis strongly developed and sclerotized, with a small spine-like projection at apex, basal 1/2 of penis strongly expanded dorsally ( Figs. 38, 40 ); 3) thumb not finger-like, reduced to a basal membrane on inner ventral margin of each penis ("t" in Fig. 40 ).

Male imago. Length (mm): body, 13.0−13.5; FW, 11.0−11.2; HW, 5.0−5.2; cerci, 31.0; foreleg, 5.5−5.7. Body coloration completely faded. Foreleg ratio of segments in relation to femur (1.6 mm): femur (1), tibia (1.0), tarsomere 1 (0.1); tarsomere 2(0.3); tarsomere 3 (0.3), tarsomere 4 (0.3), tarsomere 5 (0.3), short claw (0.2), long claw (0.3). Tarsal segments 2−5 subequal, tarsomere 1 very short. Genitalia ( Figs. 38−40 ): sternum IX subquadrate with rounded apical margin; pedestal stout, slightly flattened dorsoventrally, distally with large rounded inner corner and short acute outer corner ( Fig. 39 ); penes strongly developed and sclerotized, curved ventrally and medially, finger-like on distal half, with small acute projection at apex; basal 1/2 of penes strongly projected dorsally ( Fig. 38−40 ).

Discussion. This new species is similar to C. truncatus in genital morphology, but pedestals are stouter and penes much more developed (each lobe is very wide and large) and sclerotized. The same differences apply when compared with C. mahunkai , known also from Bolivia but here treated as synonym of C. truncatus .

Figures

FIGURES 38 − 40. C. molinai sp. nov., male adult. 38, male genitalia, v. v.; 39, pedestal, detail, v. v.; 40, penes and pedestals, v. v. (photograph). Abbreviations: ip = inner projection (pedestal); op = outer projection (pedestal); p = penes; pb = pyramidal base (penes); t = " thumb " (penes).