Paulsen, Paulsen, 2013

Paulsen, M. J., 2013, A new genus for the Neotropical species of Aesalus Fabricius, with descriptions of eight new species (Coleoptera: Lucanidae: Aesalinae), Insecta Mundi 2013 (325), pp. 1-25 : 10-11

Trogoides Paulsen , new subgenus of Trogellus , Paulsen

Type species: Aesalus trogoides Albers , here designated.

Description. This subgenus differs from the description given for Trogellus above by the presence of blunt bristles on the dorsal surface and narrower, peg-like protibial teeth ( Fig. 12 ), and from both of the other genera by the male genitalia having triangular, lateral processes on the median lobe ( Fig. 21–23 ). Tubercles are generally present on the pronotum but vary from being weak and only present near the anterior angles in T. trogoides to being well developed laterally in the other species. Both sexes of Trogoides species have poorly developed metatibial teeth ( Fig. 13 ), whereas males of both other subgenera have strongly developed teeth. Species of the subgenus Trogoides have a more elongate overall body form.

Etymology. The subgeneric name, gender masculine, is based on the specific epithet of its type species, tautonymically, and means ‘resembling Trox’.

Figures

Figures 11-14. Leg characters of subgeneric importance. 11) Right protibia of Trogellus herrmanni n. sp. with large triangular teeth (dorsal view). 12) Right protibia of T. trogoides with small peg-like teeth (dorsal view). 13) Left metatibia of T. trogoides showing weak external teeth (ventral view). 14) Left metatibia of T. herrmanni n. sp. showing strong external tooth at middle (ventral view).

Figures 18–23. Male genitalia of Trogellus species, dorsal view. 18. T. herrmanni n. sp. 19) T. ticiticus n. sp. 20) T. neotropicalis. 21) T. chapinitus n. sp. 22) T. hawksi n. sp. 23) T. trogoides. The male genitalia of T. maesi n. sp. are unknown.