Pentodon, HOPE, 1837

Bunalski, Marek & Śmiełowski, Jan, 2020, Review of African Species of the Genus Pentodon Hope, 1837 (Coleoptera: Scarabaeidae: Dynastinae: Pentodontini), The Coleopterists Bulletin 74 (3), pp. 547-554 : 552-553

TAXONOMIC KEY TO AFRICAN PENTODON

1. Pygidium with two large subapical tubercles ................................................... 2

10. Pygidium regularly convex, without tubercles ................................................... 3

2. External basal tooth of front tibia poorly developed; parameres as in Fig. 9 ................ ........ P. variolopunctatus deserti (Heyden)

20. External basal tooth of front tibia clearly visible; parameres as in Fig. 10 ................ ............. P. v. variolopunctatus Fairmaire

3. Frontoclypeal suture with two tubercles ............ 4

30. Frontoclypeal suture with one tubercle .......... 5

4. Teeth at apex of clypeus well developed and separated by deep emargination; parameres as in Fig. 7 .......... P. bidens sulcifrons Küster

40. Teeth at apex of clypeus poorly developed and separated by shallow indentation; parameres as in Fig. 6 ................ P. bidens punctatus (Villers)

5. Apex of clypeus rounded and weakly raised; elytra weakly shining, with satin luster; parameres as in Fig. 8 ................................. .................... P. idiota memnon Jakovlev

50. Apex of clypeus indented and equipped with two teeth; elytra shining ........................ 6

6. Clypeus very finely and densely punctate, its lateral edges outlined with flat carina ( Fig. 3 ); sutural stria of elytron narrow and not impressed posteriorly; parameres as in Fig. 4 .......................... P. algerinus nubicus Bunalski and Śmiełowski, n. ssp.

60. Clypeus more densely punctate, lateral edges with a ridge-shaped carina ( Fig. 1 ); sutural stria broader, slightly impressed posteriorly; parameres as in Fig. 3 .......................... 7

7. Populations from North Africa .................. ......................... P. a. algerinus (Fuessly)

70. Populations from Chad and Senegal.......... ............... P. algerinus tchadensis Paulian

Figures

Figs. 6–10. Dorsal view of Pentodon parameres (modified from Baraud 1985). 6) P. bidens punctatus; 7) P. bidens sulcifrons; 8) P. idiota memnon; 9) P. variolopunctatus deserti; 10) P. v. variolopunctatus.

Figs. 1–4. Diagnostic characters of Pentodon algerinus. 1–2) P. a. algerinus: 1) Dorsal view of head; 2) Dorsal view of parameres. 3–4) P. a. nubicus, new subspecies: 3) Dorsal view of head; 4) Dorsal view of parameres. Photos: T. Klejdysz.