Dec 10, 2019 · An unusually broad food spectrum has likely played an important role in the enormous diversification of Coleoptera (ca. 400,000 spp.). Nevertheless, the structure and configuration of the mouthparts are mostly conservative.

Sep 19, 2024 · The structure of labrum or upper lip in adult Coleoptera is only minimally investigated and used in classification and phylogeny.

Sep 19, 2024 · Dellacasa, G., Dellacasa, M. & Mann, D.J. (2010) The morphology of the labrum (epipharynx, ikrioma and aboral surface) of adult Aphodiini (Coleoptera: Scarabaeidae: Aphodiinae), and its implications for systematics.

Coleoptera Morphology Larvae: Larvae of aquatic Coleoptera can be recognized by the presence of a sclerotized head, three pairs of segmented thoracic legs, and the absence of wing pads (Figure 12.1). Characters such as the number of tarsal claws, number of leg segments, body shape, and antennal length are diagnostic characters for Coleoptera ...

Sep 24, 2010 · The morphology of the labrum (epipharynx, ikrioma and aboral surface) of adult Aphodiini is figured and discussed. An updated glossary of the constitutive parts is presented.

Sep 24, 2010 · In this study, we compare the mouthparts (epipharynx, labium, and hypo-pharynx) of five species of Dichotomius Hope from Argentina that show differences in their trophic preferences, to evaluate...

The morphology of the labrum (epipharynx, ikrioma and aboral surface) of adult Aphodiini is figured and discussed. An updated glossary of the constitutive parts is presented.

Oct 31, 2024 · The labrum is a bilaminar structure that is attached to the anterior edge of the anteclypeus (Figure 3A,B). It has a wide and short shape, almost oblong in appearance. The outer surface exhibits an irregular texture with abundant sensilla and glandular structures, including Sch1, Sch2, Sb1, Pp, and Cp (Figure 3C,D).

Nov 16, 2011 · Using for comparison with, and as outgroups for, supertribe Cicindelitae, we describe and illustrate the mandibles and labrum-epipharynx of the basal geadephagans Trachypachus gibbsii LeConte,...

This study investigates the morphology of the labrum in the flea beetle genus Chaetocnema Stephens, 1831 to assess and develop a terminology and identify potential morphological characters useful to delimitation of species and species groups as well as phylogeny reconstruction in leaf beetles.