Chariodactylus Moser, 1919

Fuhrmann, Juares & Vaz-De-Mello, Fernando Z., 2017, Macrodactylini (Coleoptera, Scarabaeidae, Melolonthinae): primary types of type species and taxonomic changes to the generic classification, European Journal of Taxonomy 350, pp. 1-71 : 27

Chariodactylus Moser, 1919

Type species

Chariodactylus chacoensis Moser, 1919 (designation: Evans 2003: 247).

Diagnosis

Clypeus and frons gradually raised over the lateral area of head ( Fig. 11A ); clypeal anteroventral area strongly reduced (similar to Fig. 11H ); posterior ocular area exposed ( Fig. 11A ), eye large; pronotum as long as wide, with anterior and posterior margins not beaded; prosternum with two anterior sulci (similar to Fig. 11H ); protibia with two external teeth and without spur ( Fig. 11A ); abdomen with intersegmental membrane VII–VIII exposed.

Remarks

The genera Chariodactylus , Macrodactylus and Manodactylus Moser, 1919 are similar to each other. Chariodactylus ( Fig. 11A ) is distinguished as follows (opposition to 1, Macrodactylus ( Fig. 11C ); 2, Manodactylus ( Fig. 11B )): clypeus broad, trapezoid (1, narrow, trapezoid; 2, as Chariodactylus ); eye large (1, 2, small); pronotum wider than long (1, longer than large; 2, as Chariodactylus ). Future cladistic analysis and a taxonomic review of Macrodactylus including Chariodactylus and Manodactylus are needed to confirm the possible synonymy between these genera.

Figures

Fig. 11. ♂♂. A−C. Head–prothorax dorsal, tarsus rotated laterally to apex. D−G. Aedeagus (lateral, parameres apex). H. Head−prothorax, ventral. A, D−E. Chariodactylus chacoensis Moser, 1919. B, F−H. Manodactylus gaujoni Moser, 1919. C. Macrodactylus pumilio Burmeister, 1855. Scale bars = 1 mm.