Melolonthidae
Creators: name: Cherman, Mariana A.
name: Basílio, Daniel S.
name: Clarkson, Bruno
name: Agostinis, André O.
name: Smith, Andrew B. T.
name: Vaz-De-Mello, Fernando Z.
name: Almeida, Lúcia M.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melolonthidae

description: IDENTIFICATION KEY TO NEW WORLD DIPLOTAXINI [modified from Cherman et al. (2017)]
1. Division between clypeus and frons distinct [see Cherman et al. (2016) for more details] (Fig. 4A); sutural ridge of elytra not narrowed posteriad (Fig. 6A); galea of maxilla curved, not forming an angle at the apex of its external margin (Fig. 4D. ............................................................................................................................................................................................................................2
-. Division between clypeus and frons indistinct; sutural ridge of elytra strongly narrowed posteriad; galea of maxilla straight, forming an angle at the apex of its external margin..................................................................................................................................3
2. Pronotal anterior corners reduced, evenly continuous with hypomeron (Fig. 4B); propygidium entirely exposed; pygidium subquadrate; elytra flattened, apex of sutural ridge of elytra rounded (Fig. 14C) ...................................................... Homalochilus
-. Pronotal anterior corners distinctly elevated, hypomeron not continuous with dorsal surface; pygidium suboval; propygidium mostly hidden by elytra; elytra flattened or convex, apex of sutural ridge of elytra angled (Fig. 14A) .................. ............................................................................................................................................................................................................ Diplotaxis
3. Frons and clypeus coplanar; concavity on disc of mentum and arched transverse carina absent (Fig. 15A) ................. Pacuvia
-. Frons and clypeus not coplanar, broad concavity on disc of mentum limited by arched transverse carina (Fig. 15B).............4
4. Inner margin of both eyes more-or-less convergent (Fig. 15D, E, G, H): anterior margin of clypeus widely rounded (Fig. 15D) or subemarginate (Fig. 15E), never forming tooth-like projections; frons and clypeus medially flattened, not concave ............................................................................................................................................................................................................................5
-. Inner margin of both eyes parallel (Fig. 15C, F); anterior margin of clypeus emarginate, forming tooth-like projections (Fig. 15C); frons and clypeus medially flattened or concave ............................................................................................................. Liogenys
5. Clypeus rounded, sometimes anterior margin narrowly emarginate (Fig. 15D); apex of both mandibles forming obtuse angle, seen in frontal view of head (Fig. 13B); apex of sutural ridge of elytra rounded or subangulate (Fig. 14B), subapical callus of elytra distinct on apex, more-or-less defined (Fig. 7I)........................................................................................ Pachrodema
-. Clypeus trapezoidal, subemarginate (Figs. 8B, 9A, 10B, 15E); apex of both mandibles forming acute angle, seen in frontal view of head (Fig. 13A); apex of sutural ridge of elytra sharp, right or obtuse-angulate (Fig. 14F), subapical callus of elytra absent (Fig. 9C) ............................................................................................................................................................................ Careocallus
description: Published as part of Cherman, Mariana A., Basílio, Daniel S., Clarkson, Bruno, Agostinis, André O., Smith, Andrew B. T., Vaz-De-Mello, Fernando Z. & Almeida, Lúcia M., 2024, New and revised taxa of Neotropical Diplotaxini (Coleoptera: Melolonthidae): do they change the existing relationships? Revisiting systematics with morphological and molecular data, pp. 98-135 in Zoological Journal of the Linnean Society 201 (1) on page 108, DOI: 10.1093/zoolinnean/zlad115, http://zenodo.org/record/11241094