Dichotomius (Selenocopris) aielloae Nunes, 2016

Nunes, Rafael V., 2016, A New Species in the SubgenusSelenocoprisBurmeister, 1846 (Coleoptera: Scarabaeidae: Scarabaeinae: DichotomiusHope) from Panama, The Coleopterists Bulletin 70 (2), pp. 375-379 : 375-379

Dichotomius (Selenocopris) aielloae Nunes , new species

( Fig. 1A–E )

Type Material. Holotype male. PANAMA: Darien Pr. Cana, Pirre Trail. El. 1250m., 4-7-VI-96. F.I. T. A. R. Gillogly / STOCKWELL STRI-ENT

375

0046987 [ STRI-ENT]. Paratypes : same data as holotype / STOCKWELL STRI-ENT 0046986 [1 male at STRI-ENT] ; same data as holotype / STOCKWELL STRI-ENT 0046985 [1 female at STRI-ENT] .

Diagnosis. The angulation of the clypeogenal junction (straight on males, obtuse female)

( Fig. 1A–B ) and pair of tubercles on the female sixth abdominal sternite ( Fig. 1E ) place this species in the Dichotomius quadraticeps species-group (Nunes and Vaz-de-Mello, unpublished data). Dichotomius aielloae is separated from other species in this group by the male cephalic carina, which bears a central blade-like horn (ventral view) ( Fig. 1D ).

This species can be separated from other Panamanian Dichotomius species by modifying couplet 6 of Howden and Young’ s (1981) key:

Figures

Fig. 1. Dichotomius aielloae. A) Holotype male STOCKWELL STRI-ENT 0046987, dorsal habitus, B) Paratype female STOCKWELL STRI-ENT 0046985, dorsal habitus, C) Same paratype female, ventral habitus, D) Frontal view of male cephalic carina with a central blade-like horn. E) Detail of female sixth sternite with white arrow indicating the central pair of tubercles.