Taxonomy of Neotropical genera Compsodactylus and Dasyus and notes on claw movement in Macrodactylini (Coleoptera: Scarabaeidae: Melolonthinae) Author Fuhrmann, Juares text Zootaxa 2019 2019-10-01 4679 1 139 163 journal article 25348 10.11646/zootaxa.4679.1.9 51ce4e31-e5c1-4dba-9967-be270c7c3481 1175-5326 3466340 D4C36872-B5F6-4007-962D-ABD17CED9BF7 Key to Dasyus species Males have the abdominal ventrite VI with a conspicuous medial concavity while the female abdomen lacks concavities. FIGURES 21–23 . Compsodactylus . 21 , Compsodactylus argentinus temones, dorsal; 22 , C . argentinus endophallus, ventral (asperites details with relative magnification of 3x); 23 , C . parvulus endophallus, ventral (asperites details with relative magnification of 3x). Scale: 0.2 mm. 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