Megachoriolaus Linsley, 1970

Monné, Marcela L. & Monné, Miguel A., 2008, The tribe Lepturini in South America (Coleoptera: Cerambycidae: Lepturinae), Zootaxa 1858, pp. 37-52 : 45-46

Megachoriolaus Linsley, 1970

Megachoriolaus Linsley, 1970: 128 ; Monné, 2006: 127 (cat.).

Type species: Megachoriolaus chemsaki Linsley, 1970 (original designation).

According to Chemsak (2005), this genus has a moderately robust form; the elytra parallel–sided or slightly expanded posteriorly; antennae relatively short in both sexes, basal antennomeres shiny, usually abbreviated, clothed with coarse suberect hairs, antennomere 4 short, outer antennomeres thickened or subserrate. Pronotum with punctation not finer than that of base of elytra; prosternum with intercoxal process very narrow; mesosternum with intercoxal process prominent, not recessed between coxae. Legs with procoxae prominent; posterior tarsi distinctly shorter than tibiae, first segment usually not longer than remaining segments combined. Elytra with fine, non-elevated costal lines. Abdomen with last segment in male not excavated.

Megachoriolaus includes eight species from Mexico and Central America : M. chemsaki Linsley, 1970 , M. flammatus (Linsley, 1961) , M. imitatrix Linsley, 1970 , M. lineaticollis Chemsak & Linsley, 1974 , M. nigricollis Chemsak & Linsley, 1974 , M. patricia (Bates, 1885) , M. spiniferus (Linsley, 1961) , M. unicolor (Bates, 1892) and M. yucatanus Giesbert & Wappes, 2000 , as well as M. cruentus (Martin, 1930) , M. ignitus (Schaeffer, 1908) and M. texanus (Knull, 1941) from the mountains of the southwestern United States. We propose to add three species from South America , previously in Euryptera , by the presence of Megachoriolaus generic characters as elytra parallel–sided, without dorsal carinae. These are: M. atripennis ( Bates, 1870) , new combination, M. bicolor ( Gounelle, 1911) , new combination and M. venustus ( Breme, 1844) , new combination. A new species is described from Brazil (Rondônia) and Bolivia.