Macrodactylini (Coleoptera, Scarabaeidae, Melolonthinae): primary types of type species and taxonomic changes to the generic classification Author Fuhrmann, Juares Author Vaz-De-Mello, Fernando Z. text European Journal of Taxonomy 2017 2017-09-13 350 1 71 journal article 22059 10.5852/ejt.2017.350 52e4ae01-f51f-4c4a-8a14-9fb5b17788d6 2118-9773 3832682 8D14DBDE-AD13-445B-B2D0-221F19FC7C37 Euryaspis Blanchard, 1850 , revalidated Ctenotis Burmeister 1855: 20 , syn. nov . Type species: Ctenotis obesa Burmeister, 1855 (designation: monotypy). Euryaspis Lacordaire, 1856: 259 (synonymy with Plectris ). Type species Euryaspis gaudichaudii Blanchard, 1850 (designation: monotypy). Diagnosis Clypeus transverse, narrow, posterior angle partially covering the canthus ( Fig. 12A ), ventral area deflected vertically; pronotal anterior and posterior margins not beaded, lateral margins crenulate, posterior margin prominent ( Fig. 12A ), prosternum anteriorly concave (similar to Fig. 12K ); protibia with three external teeth and with a spur ( Fig. 12A, C ); elytral striae indistinct, posterior and posterointernal margins not beaded; abdomen with intersegmental membrane VII–VIII concealed. Remarks The present study proposes the synonymy of Ctenotis with Euryaspis and revalidates Euryaspis , formerly a synonym of Plectris , based on the following characters (opposition to Plectris ): pronotal lateral margins crenulate (margins straight), posterior margin prominent (not prominent); internal area of metatarsomere V without spine-like setae (with spine-like setae). Euryaspis is distinguished from other Macrodactylini by having a narrow and transverse clypeus, pronotal lateral margins crenulate and posterior margin strongly prominent. According to the new synonymy proposed here ( Ctenotis synonym of Euryaspis ), the genus now comprises two species: E . gaudichaudii ( type species of Euryaspis ) and E . obesa ( Burmeister, 1855 ) comb. nov. ( type species of Ctenotis ). Euryaspis gaudichaudii is distinguished as follows (opposition to E . obesa ): antennal clavae of male and females with three antennomeres ( Fig. 12B ) (four antennomeres, Fig. 12A ); protarsomere IV about twice as long as wide ( Fig. 12C ) (as long as wide, Fig. 12A ); protarsal claws gradually curved ( Fig. 12C ) (abruptly curved, Fig. 12A ); male abdominal ventrites with a medial comb of long setae (setae homogeneously distributed).