Morfologia das peças bucais de seis gêneros da tribo hylobiini (coleoptera:curculionidae:molytinae)

Abstract

Curculionidae (Coleoptera) is the largest family among beetles with about 6,000 genera and 65,000 described species worldwide; the number of subfamilies varies from 16 to 27 and among them is Molytinae, a taxa that presents great biological and morphological diversity, which makes it difficult to carry out revisions of the different groups and to establish an accurate diagnosis of the group. The present work presents a descriptive study of the external anatomy of the buccal parts of six genera and twelve species belonging to the Hylobiini tribe (Molytinae) with the objective of analyzing the contribution of these characters in the taxonomic identification of the species and as subsidies for the establishment of hypotheses of relation of kinship between species. The specimens examined belong to the collection of Entomology "Pe Jesus Santiago Moure" Department of Zoology of the Federal University of Paraná, their mouthparts were dissected to observe the jaw, maxilla and lip and the illustrations were made; With the description of the oral parts it was possible to observe that the jaws generally have sinuous outer margin and internal margin containing up to three teeth, the maxilla and the lip have trisegmentalized articles with the presence of bristles, on average four teeth in the lacinia region, and globular and membranous type ligula being visible in lateral view . characteristics that allowed new studies to define groupings within the group.