G. it. Ent., 12 (54A): 119-133
May 2008
Una nuova sottospecie di Megasoma gyas Jablonsky in Herbst
(Coleoptera: Scarabaeidae: Dynastinae)
da Santa Catarina, Brasile
di
LEONELLO MILANI
Abstract - A new subspecies of Megasoma gyas Jablonsky in Herbst (Coleoptera: Scarabaeidae: Dynastinae) from Santa Catarina, Brazil - A new subspecies of Megasoma gyas Jablonsky in Herbst, Megasoma gyas prandii ssp. nov. from Timbó, Itajaí river Valley, Santa Catarina, Brazil is described and illustrated. The new subspecies is characterized from the other ones (M. g. gyas, M. g. rumbucheri, M. g. porioni) through the following combination of male features: frontal horn long, strongly and evenly curved upwards, in dorsal view about of equal thickness at base and just before bifurcation, slightly swollen hardly before mid-length, along the sides bordered with a distinct rim almost over the whole length; in lateral view at base dorsally with a large and low triangular tooth, blunt at apex, the latter about at level of clypeus edge; thoracic horn strongly curved downwards, distinctly reaching beyond the apex of basal tooth of frontal horn; fore tibia proximal tooth narrow and almost parallel-sided at base, not broadly triangular. M. gyas prandii ssp. nov., occurring south of 25th parallel, is the southernmost known subspecies of M. gyas.
