Cyclocephala bicolor
Creators: name: Joly, Luis J.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Dynastidae
Cyclocephala
Cyclocephala bicolor

description: Key for identification of the species of the Cyclocephala bicolor group of the genus Cyclocephala
1. Anterior tarsi enlarged (males) ..................................................................................................................................... 2
- Anterior tarsi slender (females) .................................................................................................................................... 6
2. Second ventrite with a triangular, flat projection on posterior half; basal tooth of protibiae (Fig. 29) distinctly directed forward, separated from middle tooth by a distance about 2.0 times longer than that separating middle from anterior tooth; clypeus on apical half slightly convex in lateral view (Fig. 12) ....................... C. dichroa Dechambre.
- Second ventrite without triangular projection; basal tooth of protibiae (Figs. 24, 26, 28, 31) with anterior border usually perpendicular to longitudinal axis of tibiae and separated from the middle tooth by a distance 1.5 times or less than that separating middle from anterior tooth; clypeus on apical half more or less flat to slightly concave in lateral
view (Figs. 4, 8, 16) .................................................................................................................................................... 3 3. Frontoclypeal suture (Fig. 15) posteriorly projecting angularly; punctation on scutellum very fine, much more so than on middle of base of pronotum; punctation on apical region of pygidium very fine, distinctly finer than that of basal region, which is moderately fine ............................................................................................... C. anibali, sp. n.
- Frontoclypeal suture (Figs. 3, 7, 11) posteriorly projecting arcuately or almost straight; punctation of scutellum fine, scarcely finer than that on center of pronotal base; punctation on apical region of pygidium fine, scarcely smaller than that of basal region, which is strong to moderately strong .................................................................................. 4
4. Punctures on base of clypeus not discrete, closely set, mostly confluent, appearing as irregular and fine, more or less transversely striate; frontoclypeal suture posteriorly projecting arcuately (Fig. 3); surface of pygidium smooth (50X) ...................................................................................................................................................................................... 5
- Punctures on base of clypeus moderately strong, discrete, somewhat transverse, the distance between most punctures smaller than the diameter of puncture; frontoclypeal suture very slightly arcuately projecting posteriorly (Fig. 7); surface of pygidium finely alutaceous (50X) ........................................................................ C. bicolorata Endrödi
5. Labium (Fig. 5) with strong, dense piliferous punctures on basal two-thirds; metatibiae (Figs. 49–50) with piliferous punctures almost restricted to those of normal longitudinal series close to posterior border; distances between most punctures on apex of pygidium usually smaller than 2.0 times the diameter of punctures; apex of pygidium (in posterior view) feebly convex-truncate. .................................................................................................... C. bicolor Laporte
- Labium with one longitudinal series of long bristles on each side, converging towards base; mesotibia and especially metatibiae with numerous piliferous punctures over all surface, in addition to those of normal longitudinal series; distances between most punctures on apex of pygidium usually 2.0 times or more larger than the diameter of punctures; apex of pygidium (in posterior view) rounded..................................................................... C. sarahae Ratcliffe
6. Basal tooth of protibiae distinctly anteriorly projected, separated from the middle tooth by a distance about 2.0 times larger than that separating the middle from the anterior (Fig. 30); clypeus convex in lateral view (Fig. 12) ................ .................................................................................................................................................... C. dichroa Dechambre
- Basal tooth of protibiae more diagonal and/or its anterior border more or less perpendicular to longitudinal axis of tibiae, separated from the middle tooth by a distance 1.5 or less than that separating the middle from the anterior (Figs. 25, 27, 29, 32); clypeus more or less flat in lateral view (Figs. 4, 8, 16) .......................................................... 7
7. Punctures on apical region of pygidium distinctly smaller than those of basal region. ...................... C. anibali sp. n.
- Punctures on apical region of pygidium scarcely smaller than those of basal region, which are strong to moderately strong ........................................................................................................................................................................... 8
8. Pygidium feebly convex in lateral view, surface smooth, punctures more or less strong almost to apex, on apical region somewhat smaller, usually dense, sometimes scattered ....................................................... C. bicolor Laporte
- Pygidium strongly convex in lateral view, surface finely alutaceous (50X), punctures more or less strong at base, smaller on apex, most distances between punctures 2.0 or more times larger than diameter of puncture. .................... .................................................................................................................................................... C. bicolorata Endrödi
description: Published as part of Joly, Luis J., 2009, Review of the species in the Cyclocephala bicolor Laporte species group (Coleoptera: Scarabaeidae: Dynastinae), pp. 47-64 in Zootaxa 2048 on pages 48-49, DOI: 10.5281/zenodo.186485