Onthophagus dicranius, Bates, 1887

Delgado, Leonardo & Mora-Aguilar, Eder F., 2019, A new Mexican species of Onthophagus Latreille (Coleoptera: Scarabaeidae: Scarabaeinae), with a revised key to the species of the O. dicranius species complex, Zootaxa 4695 (6), pp. 586-592 : 591

publication ID

https://doi.org/ 10.11646/zootaxa.4695.6.9

persistent identifier

https://treatment.plazi.org/id/03C287E2-5F33-4931-D4B3-86D4FA4DA073

treatment provided by

Plazi

scientific name

Onthophagus dicranius
status

 

Key to separate species in the Onthophagus dicranius View in CoL species complex

(partially modified from Howden & Gill 1993 and Kohlmann & Solís 2001)

1. Elytral intervals with stout setae, in three or more rows on second interval; Panama... O. dorsipilulus Howden & Gill, 1987 View in CoL

- Elytral intervals glabrous or with fine setae, in two rows on second interval....................................... 2

2 Punctures of the pronotal disc simple or weakly annulate, small, shallow, and sparse (most separated by two or more puncture diameters)........................................................................................... 3

- Punctures of the pronotal disc with annulate and/or large, deep, and dense (most separated by less than one puncture diameter)............................................................................................... 4

3 Males with frons and vertex flat, with distinct, moderate-sized punctures ( Figs. 9–10 View FIGURES 9–18 ); females with pronotum evenly convex ( Fig. 10 View FIGURES 9–18 ); Mexico............................................................... O. subcancer Howden, 1973 View in CoL

- Males with frons and vertex convex, with fine punctures ( Figs. 5–6 View FIGURES 1–8 ); females with pronotal disc slightly concave ( Fig. 6 View FIGURES 1–8 ); Mexico................................................. O. chimalapensis Delgado & Mora-Aguilar View in CoL , new species

4 Pronotum and elytra distinctly setose with short or long setae.................................................. 5

- Pronotum and elytra glabrous or with minute setae.......................................................... 7

5 Elytral intervals with simple punctures; Mexico............................. O. asperodorsatus Howden & Gill, 1993 View in CoL

- Elytral intervals with annulate punctures................................................................... 6

6 Male with a short, broad, distinctly emarginate pronotal protrusion; Costa Rica. O. cryptodicranius Kohlmann & Solís, 2001 View in CoL

- Male with a moderately long, slender, slightly emarginate pronotal horn; female unknown; Costa Rica........................................................................................... nubilus Kohlmann & Solís, 2001 View in CoL

7 Profemora with central region yellow, the rest brown; Costa Rica, Panama..................... O. dicranius Bates, 1887 View in CoL

- Profemora entirely brown.............................................................................. 8

8 Elytra short, moderately rounded; brachypterous; Costa Rica.................. O. inediapterus Kohlmann & Solís, 2001 View in CoL

- Elytra and wings well developed......................................................................... 9

9 Pygidium with deep and simple punctures, apex shiny; male with two laterally compressed and triangular pronotal projections; Belize, Mexico........................................................... O. petenensis Howden & Gill, 1993 View in CoL

- Pygidium with shallow, annulate punctures, surface completely dull; males with a slender, long pronotal horn........... 10

10 Male with a slender, feebly emarginate clypeal horn; female with a weak, frontoclypeal carina; Costa Rica....................................................................................... O. quetzalis Howden & Gill, 1993 View in CoL

- Male with a distally widened, bifurcate clypeal horn; female with a distinct frontoclypeal carina; Panama.............................................................................................. O. kohlmanni Génier, 2017 View in CoL

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Scarabaeidae

Genus

Onthophagus

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