Deltepilissus Pereira, 1949

Silva, Fernando A. B., Ferreira, Ana B. M. & Génier, François, 2022, Taxonomic revision of the genus Deltepilissus Pereira, 1949 (Coleoptera: Scarabaeidae: Scarabaeinae: Deltochilini), Zootaxa 5120 (1), pp. 83-96 : 86

Key to adults of Deltepilissus Pereira, 1949 and similar genera in the tribe Deltochilini

(modified from Vaz-de-Mello et al. 2011)

1. Tarsal claws reduced, straight or only weakly curved ( Figs 1G–I , 2I–L ). Hypomera convex or weakly excavated anteriorly ( Figs 1D , 2F ). Head lacking transverse carina................................................................... 2

- Tarsal claws large, strongly curved, falciform or angulate; if only weakly developed, then either hypomera deeply excavated anteriorly or head with transverse carina or both............ other Deltochilini genera (see Vaz-de-Mello et al. 2011, 2020)

2. Protibiae short, with lateral teeth large and contiguous. Metatibial spur spiniform...................................3

- Protibiae long, with three small and spaced teeth ( Figs 1A–B , 2A–D ). Metatibial spur short, spatulate, with denticle (spiniform process) at least on inner edge ( Figs 1H–I , 2K–L )..................................... Deltepilissus Pereira, 1949 ...4

3. Protibiae with lateral teeth set along apical third, at least apical two directed towards apex...... Scatonomus Erichson, 1835

- Protibiae with lateral teeth set along apical half or more; at least second tooth directed laterally..................................................................................................... Anomiopus Westwood, 1842

4. Punctures of central portion of pronotum spaced by at least twice their diameter ( Figs 2A, 2C ). Males with denticle on external edge of protibial spur ( Fig. 2I ). Males with a conspicuous denticle on inner edge of metatibial spur ( Fig. 2K ). Body length 9–11 mm. Apex of parameres sightly curved inward in dorsal and ventral views ( Figs 3D–E ). Brazil (Espírito Santo, Rio de Janeiro, and São Paulo)................................................................. D. infernalis ( Harold, 1880)

- Punctures of central portion of pronotum closely set, spaced by less than their diameter ( Fig. 1A ). Males with wide and rounded protibial spur, without denticle apically ( Fig. 1G ). Males with rounded metatibial spur apically, inner denticle almost inconspicuous ( Fig. 1H ). Body length about 15 mm. Apex of parameres distinctly curved inward in dorsal and ventral views ( Figs 3A–B ). Brazil (Bahia)....................................................... D. diabolicus ( Harold, 1880)

Figures

FIGURE 1. Details of the external morphology of Deltepilissus diabolicus. A, Body, male, dorsal view; B, body, male, ventral view; C, head, male; D, hypomeron, male; E, abdominal ventrites, male; F, pygidium, male; G, detail of protibial spur, male; H–I, left metatibia, ventral view, male and female, respectively (arrows indicate apex of metatibial spur).

FIGURE 2. Details of the external morphology of Deltepilissus infernalis. A–B, Body, male, dorsal and ventral views, respectively; C–D, body, female, dorsal and ventral views, respectively; E, head, male; F, hypomeron, male; G, abdominal ventrites, male; H, pygidium, male; I–J, detail of protibial spur, male and female, respectively; K–L, right metatibia, ventral view, male and female, respectively (arrows indicate apex of metatibial spur).

FIGURE 3. Details of the male genitalia in Deltepilissus. A–C, Deltepilissus diabolicus: A, parameres, dorsal view; B, parameres, ventral view; C, aedeagus, lateral view. D–F. Deltepilissus infernalis: D, parameres, dorsal view; E, parameres, ventral view; F, aedeagus, lateral view. G, Deltepilissus diabolicus superior right peripheral (SRP) endophallite. H, Deltepilissus infernalis superior right peripheral (SRP) endophallite. I, Deltepilissus diabolicus frontolateral peripheral (FLP) endophallite. J, Deltepilissus infernalis frontolateral peripheral (FLP) endophallite. K, Deltepilissus diabolicus additional endophallites (AE). L, Deltepilissus infernalis additional endophallites (AE). M, Deltepilissus diabolicus complex of axial and subaxial (A+SA) endophallites. N, Deltepilissus infernalis complex of axial and subaxial (A+SA) endophallites.