New brachypterous species of Dichotomius Hope, with taxonomic notes in the subgenus Luederwaldtinia Martínez (Coleoptera: Scarabaeidae: Scarabaeinae) Author Nunes, Rafael V. Author Vaz-De-Mello, Fernando Z. text Zootaxa 2013 2013-01-31 3609 4 411 420 journal article 10.11646/zootaxa.3609.4.3 efd85aa0-d2a5-4d72-8125-6d45ab6935fc 1175-5326 224051 4D73C473-2533-4E1B-A039-113DF838F42A Notes on Dichotomius eucranioides Pereira & D’Andretta Since the time of its description ( Pereira & D’Andretta 1955 ), D. eucranioides has maintained a doubtful position within the subgenus Luederwaldtinia . Pereira & D’Andretta (1955) did not assign this species to a species group but Vulcano et al. (1967) later placed it in the D . assifer species group due the presence of a transversal carina on the head of males. However, we believe that D. eucranioides should be considered to be in its own species group within the subgenus for the following reasons: it is the only species in the genus that has a crenulate clypeal margin ( Fig. 2 A); the transversal carina width on the head is subequal to the distance between the eyes and is greater than its height; the pronotal disc of males is anteriorly delimited by four gibbosities; the pronotal declivity of males has two lateral depressions filled with ocellate punctures; and, contrary to the species of D . assifer species group, D. eucranioides hypomeron do not have an anterior excavation delimited medially by a dense brush of red setae. Although D. eucranioides is a brachypterous species, we decided not to redescribe herein since the descriptions of the female ( holotype , Pereira & D’Andretta 1955 ) and of the male ( Vulcano et al. 1976 ) are detailed enough.