Dasyus, LePeletier & Audinet-Serville, 1828

Fuhrmann, Juares, 2019, Taxonomy of Neotropical genera Compsodactylus and Dasyus and notes on claw movement in Macrodactylini (Coleoptera: Scarabaeidae: Melolonthinae), Zootaxa 4679 (1), pp. 139-163 : 145-147

Key to Dasyus species

Males have the abdominal ventrite VI with a conspicuous medial concavity while the female abdomen lacks concavities.

1. Disc of elytra densely setose; protarsomeres I–IV of males with inner setal comb ( Fig. 41 ); pygidium of females with a shallow longitudinal sulcus; ventrite VI of males with a medial concavity surrounded anterolaterally by carina ( Fig. 25 )........................................................................ D. collaris LePeletier & Audinet-Serville, 1828

- Disc of elytra almost glabrous; protarsus of males without setal comb; pygidium of females without sulcus; ventrite VI of males with a medial concavity surrounded laterally by raised lobes ( Fig. 26 )........................ D. variabilis Moser, 1918

Figures

FIGURES 38–45. Dasyus collaris. 38, prothorax, anterior (right side with cervix and coxa omitted); 39, prothorax, posterior (right without intersegmental membrane and coxa omitted); 40, prothorax, ventral (right side with hypomeron bridge detached); 41, protibia-tarsus of males (with protracted pretarsus), details: a, tarsomere V with retracted pretarsus, b–c, tarsomere V, inner (with protracted/retracted pretarsus, respectively), d, tarsomere I detail; 42, 43, mesotibia-tarsus (female, male); 44, metatibiatarsus of male (with protracted pretarsus) and detail of tarsomere V with retracted pretarsus; 45, apex of metatibia. am1, angulate margin between hypomeron and posterior fold of pronotum; am2, angulate margin between dorsal and ventral areas of posterior fold of pronotum. Scale = 1 mm.

FIGURES 24–26. Dasyus male. 24, Dasyus collaris habitus, lateral (without some appendages); 25, D. collaris abdomen, lateroventral; 26, D. variabilis abdomen, lateroventral. Scale = 1 mm.