Notes and descriptions of Neotropical Macrotomini (Coleoptera, Cerambycidae, Prioninae)

Abstract

RESUMO.Notas e descrições em Macrotomini neotropicais (Coleoptera, Cerambycidae, Prioninae). Mallodon vermiculatus sp. nov. procedente do Panamá e Nothopleurus santacruzensis sp. nov., da Bolívia, são descritas e ilustradas. Mallodon dasystomus dasystomus (Say, 1824) = Mallodon mandibularis Lackerbeck, 1998 syn. nov. PALAVRAS-CHAVE.Mallodon; espécies novas; Nothopleurus; Prioninae; sinonímia. The New World Macrotomini, Thomson, 1860 mostly are larger species, similar in general appearance, usually brown in dorsal coloration, with well-developed mandibles in both sexes, but particularly in the males. Characters by which some taxa have been distinguished have been viewed or interpreted differently by various workers, and a comprehensive study of individual variation and phenotype distribution is needed to resolve the relationships of some of the more widespread and abundantly collected subspecies and species. This paper proposes two distinctive new species and one new synonym from Central America. ABSTRACT. Mallodon vermiculatusBibliographical citations on Mallodon dasystomus dasystomus (Say, 1824), relative to the synonymy proposed, are restricted to the original description, MONNÉ's catalog (1995), and citations subsequent to that catalog.The Male (Fig. 1). Integument red-brown to castaneous; elytra lighter red-brown, head, mandibles, scape, second and third antennal segments, prothorax and profemora darker. Dorsal surface of the head with deep, coarse punctures scattered on occiput and anastomosing toward the front; front and clypeus with smaller, scattered punctures, each of which gives rise to a long, erect hair. Labrum sub-horizontal, clothed with long, erect hairs, apex acuminate and projecting anteriorly. Postocular region coarsely, deeply punctate, becoming confluent toward the lower eye lobe, with well-marked transverse furrows behind the eye and scattered punctures toward the gula. Genal apex angular with a single, anteriorly projecting, rounded apical tooth. Hypostomal semicircular depression deep, distinctly delimited by elevated lateral margins (Fig. 3), inner surface deeply, coarsely vermiculate.Mandibles elongate, relatively narrow, distinctly longer than head, arcuate at apex; dorsal carina strongly elevated from base to near apex, terminating abruptly and forming nearly a 90° angle with the dorsal surface before apical tooth; external surface with scattered, moderately coarse punctures, more concentrated apically; ventral surface deeply, longitudinally excavated, nearly glabrous and impunctate; internal surface clothed along lower one-half with a dense fringe of long erect hairs; inner margin irregularly dentate from base to apex, with a large, triangular tooth at basal one-third and another, slightly smaller, at the apical third, between which is an uneven series of small, sub-triangular teeth, and a single small tooth behind the large tooth at basal third; apices broadly bifid, outer apical tooth long and acute, inner apical tooth narrowly rounded. Antennae extending to near middle of elytra; s...