Cyclocephala bicolorata Endrödi, 1964

Joly, Luis J., 2009, Review of the species in the Cyclocephala bicolor Laporte species group (Coleoptera: Scarabaeidae: Dynastinae), Zootaxa 2048, pp. 47-64: 55-59

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Cyclocephala bicolorata Endrödi, 1964


Cyclocephala bicolorata Endrödi, 1964 

( Figs. 2View FIGURE 2, 7–10, 20View FIGURES 3 – 23, 26–27View FIGURE 24 – 33, 36View FIGURE 34 – 48, 44–45, 51View FIGURES 49 – 57 – 52, 59View FIGURE 58 – 77, 63–64, 73 – 74)

Bibliography. Cyclocephala bicolorata Endrödi 1964: 441  (description, male; compared with C. bicolor  ), Fig. 10View FIGURES 3 – 23 (genitalia). Holotype male Col. Endrödi. Type locality: Venezuela: Llanos. Endrödi 1966: 91 (key, male), 143 (key, female), 157 (description, male), Fig. 388 (genitalia), Venezuela. Dechambre 1979: 160, Venezuela, Brazil. Endrödi 1985: 110 (key, male), 146 (key, female), Fig. 650 (genitalia), Venezuela. Dechambre 1992: 67 (compared with C. dichroa  ), Fig. 33View FIGURE 24 – 33 (genitalia).

Description. Short, oval, moderately shiny. Red to brownish red; frons and vertex black, elytra testaceous. Dorsal surface and pygidium glabrous, ventral pubescence sparse. Length: 11.0–11.8 mm.

MALE: Clypeus ( Fig. 7View FIGURES 3 – 23) about 2.4 times as wide across base as long; sides straight, strongly convergent to truncated and feebly reflexed apex; shallowly sulcate longitudinally along middle and shallowly depressed laterally before apex, in lateral view flat to slightly concave on apical half; surface finely alutaceous, with punctures moderately strong, discrete, somewhat transverse (especially on base), dense, the distance between most punctures smaller than the diameter of the puncture, more dense towards apex. Frontoclypeal suture ( Fig. 7View FIGURES 3 – 23) thin, slightly arcuately projecting posteriorly. Frons width about 2.5 times transverse diameter of eye, finely alutaceous; punctures similar to those of clypeus, but somewhat more scattered, except on a narrow, smooth, transverse band behind frontoclypeal suture and another longitudinal band along midline.

Mandibles with external border sinuate, apex projecting externally. Maxillae ( Fig. 10View FIGURES 3 – 23) with galea moderately strong, with two apical, one median and three basal teeth, the basal teeth very small and arising from a common base; stipes projected anteriorly on inner side and with a brush of fine, yellowish brown setae on apex of projection; maxillary palpi ( Fig. 20View FIGURES 3 – 23) moderately robust, second palpomere with a small projection at base, longer than third, fourth palpomere fusiform, 3.0 times as long as preceding. Labium ( Fig. 9View FIGURES 3 – 23) with sides slightly convex on basal two-thirds, not constricted at the middle of apical half; apex truncate on ventral side, with two small projections at middle on oral side, and fimbriated with long, fine, yellowish brown setae; surface without punctures on disc, with one longitudinal series of long bristles on each side, converging towards base.

Antennae with 10 antennomeres, club about 2.0 times the length of antennomeres 2–7 together.

Pronotum 1.4 times as wide as long, widest near base, sides more strongly convergent to apex on anterior half; anterior border widely and arcuately projected at middle; basal angles widely rounded; basal border without marginal bead, almost uniformly arcuate, slightly more projected in central third; surface finely alutaceous (40 X); punctures annulate, moderately fine and dense, the distance between most punctures on disc as long as or longer than diameter of punctures, punctures gradually larger toward sides, diameter of a puncture about 2.0 times the diameter of those on center of disc, more dense on basal angles, where the distance between most punctures is as long as or shorter than the diameter of a puncture; surface also covered with numerous minute punctures (50 X or more). Scutellum triangular, sides feebly arcuate, apex briefly rounded; punctures similar to those on pronotal disc.

Elytra 1.2 times as long as wide, arcuately widened from first quarter to middle, then rounded to apex, sutural angle well defined, but rounded; humeral and apical umbones weak; with feeble, short, elongate tumescence behind humeral umbones on external border; surface smooth, with large, shallow, annulate punctures, much smaller on sides and apex, double rows not evident; also with numerous minute punctures (50 X or more) scattered over all surface; sutural interstria flat, weakly elevated on apical half. Epipleura narrow, more so apically.

Pygidium 2.0 times as wide as long; in posterior view the inferior borders straight, converging to narrow and feebly convex-truncate apex in an angle distinctly greater than 90 °; in lateral view ( Fig. 63View FIGURE 58 – 77) slightly convex, more strongly convex on apical half; surface finely alutaceous, with abundant minute punctures and with large annulate punctures, more dense on lateral angles; punctures on apex distinctly smaller and less dense, the distances between most punctures more than 2.0 times its own diameter.

Protibiae ( Fig. 26View FIGURE 24 – 33) tridentate, small basal tooth separated from the intermediate tooth by a distance 1.4 times as long as that between the intermediate and anterior teeth; intermediate and anterior teeth well developed, basal tooth with its anterior border more or less perpendicular to longitudinal axis of tibiae; apical spur almost straight, surpassing apex of first tarsomere. Protarsi ( Fig. 36View FIGURE 34 – 48) enlarged; tarsomere 5 shorter than 1–4 together, without ventro-internal carina, ventral side with very short and very fine longitudinal striae on inner side of apex; tarsomere 4 longitudinally striated on less than apical half; tarsomere 3 striated only on inner side of apical half; largest claw ( Figs. 44–45View FIGURE 34 – 48) wide, flattened, moderately narrowly cleft at apex, the external border of small branch continuous with internal curvature of the claw. Metafemur ( Fig. 51View FIGURES 49 – 57) robust, 2.0 times as long as its maximum width, its anterior border strongly convex. Metatibiae ( Fig. 51View FIGURES 49 – 57) robust, widened at apex, bristles on diagonal carina and apex very strong. Metatarsi subequal in length to tibiae, with first tarsomere widened towards apex, with apical bristles similar to those of apex of tibiae.

Prosternal projection high, apex alutaceous, anterior part transversely oval, externally pointed; posterior part shorter but wider than anterior, posterior border fimbriate with long bristles.

Pronotal hypomera alutaceous, with sparse erect setae. Mesopleura, metapleura, and sides of metasternum alutaceous, with large, dense confluent, annulate punctures; disc of metasternum smooth, with small, scattered punctures; metacoxae with punctures similar to those of pleurae but smaller and more disperse. Ventrites with annulate, moderately dense punctures, smaller and sparser on apical ventrites.

Aedeagus: Figs. 73–74View FIGURE 58 – 77.

FEMALE: differs from the male in the following characters: punctation generally stronger; protibiae Fig.View FIGURE 24 – 33

27; protarsi slender; metafemora ( Fig. 52View FIGURES 49 – 57) somewhat stronger; metatibiae Fig. 52View FIGURES 49 – 57; epipleura ( Fig. 59View FIGURE 58 – 77) strongly narrowed at level of anterior border of metacoxa, then widened up to level of middle of second ventrite; pygidium in lateral view Fig. 64View FIGURE 58 – 77.

Distribution: Venezuela, Brazil.

Specimens studied: VENEZUELA: Apure: Hato El Frío, Fundo El Ceibote, 100 m, 29 -V- 1975, C. J. Rosales, 1 F ( MIZAAbout MIZA). Bolívar: Guri, Río Caroní, 11 -IV- 1968, J. Salcedo, 1 M ( MIZAAbout MIZA).

Other localities: VENEZUELA: Llanos. BRAZIL: São Felix do Xingu (Moyen Xingu) ( Dechambre 1979).


Museo del Instituto de Zoologia Agricola Francisco Fernandez Yepez