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Issue: Vol. 5512 No. 2: 19 Sept. 2024
Type: Article
Published: 2024-09-19
DOI: 10.11646/zootaxa.5512.2.3
Page range: 185-199
Abstract views: 201
PDF downloaded: 18

Morphology and taxonomic significance of the labrum in the flea beetle genus Chaetocnema Stephens, 1831 (Coleoptera, Chrysomelidae, Galerucinae, Alticini)

Department of Entomology; Kerala Agricultural University; Vellayani PO; Thiruvananthapuram 695 522; Kerala; India
Department of Entomology; Kerala Agricultural University; Vellayani PO; Thiruvananthapuram 695 522; Kerala; India
Coleoptera Leaf beetles phylogeny new characters systematics mouth parts terminology

Abstract

The structure of labrum or upper lip in adult Coleoptera is only minimally investigated and used in classification and phylogeny. This study investigates the morphology of the labrum in the flea beetle genus Chaetocnema Stephens, 1831 (Chrysomelidae, Galerucinae, Alticini) 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.

 

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