Odontolochus costatus Endrödi, 1964

Stebnicka, Zdzisława T., 2009, A revision of the African species of Odontolochini Stebnicka & Howden, 1996 (Coleoptera: Scarabaeidae: Aphodiinae), Zootaxa 2230, pp. 1-15 : 10

Odontolochus costatus Endrödi, 1964

( Fig. 9 )

Odontolochus costatus Endrödi, 1964: 375 –376 — Dellacasa 1988: 286 (catalog).

Material examined. Holotype female [ The Democratic Republic of the Congo] 'Musee du Congo, Luebo, 13.VIII.1924, Dr. H. Schouteden', Odontolochus sp. Boucomont det.1926'/, 'Monotypus Odontolochus costatus Endr. ' ( MRAC).

Other specimens examined (10). Cameroon: Edip Kombo near Yaoinde, 8.III.1982, at light, F. Wotari ( MHNG); Ebolowa, St Nikoemyone, 24.IV. 1970; N’Kolbisson, 11.IV.1966, Ph. Bruneau de Miri ( PBC). Gabon: Belinga, 23.V.1963, 27.I.1963, 26.III.1963, H. Coaffait ( PBC). Burkina Faso: Nahouri, Forest Nazinga, Akwazena, 16.VII.2006; Naguio, 24.VII.2006, F.& S. Génier ( CNC).

Diagnosis. Head strongly deflexed, with two small tubercles near eyes. Pronotum coarsely punctatetuberculate ( Fig. 9 ); median anterior disc transversely tumid then shallowly concave in front of median irregular swellings, basal ridge composed of coarse punctures and irregular tubercles. Elytral striae shallow with large but shallow punctures, odd intervals including sutural interval sharply carinate, even intervals very weakly convex or flat. Odontolochus costatus is most similar to O. spinicollis but differs from that species by its smaller size and only alternate elytral intevals costate.

Description. Length 3.5–4.0 mm. Body oblong-oval, piceous, dull. Head broad, strongly deflexed, with two small tubercles near eyes, punctures moderate in size, distinct, separated by less than one time their diameter. Pronotum coarsely punctate-tuberculate; median anterior disc shallowly transversely tumid then shallowly concave in front of median irregular swellings, median area separated from basal ridge by second shallow concavity; basal ridge extends to anterior angles, composed of coarse punctures and irregular tubercles; base of pronotum at middle with distinct, slightly upturned marginal line. Elytral humeral denticles fine; striae shallow with large but shallow punctures, odd intervals including sutural interval sharply carinate, carinae shining, smooth, even intervals very weakly convex, impunctate. Ventral surface alutaceous; mesosternal median area triangular in shape, with few fine punctures at base, lateral furrows deep; metasternum slightly concave, discal punctures moderate, close, lateral area with twice larger punctures; abdominal sternites coarsely fluted along sutures with quadrate pits between costulae, surface punctate; disc of pygidium eroded with longitudinal carina. Femora narrow, parallel-sided; protibia with three normal lateral teeth in both sexes. Tarsi relatively long; basal metatarsomere subequal in length to upper tibial spur and to two following tarsomeres combined.

Male. Disc of pygidium longer than in female.

Distribution. Burkina Faso, Cameroon, The Democratic Republic of the Congo, Gabon.

Figures

FIGURES 6 – 21. Figs 6 – 13, pronotum, lateral outline, 6. O. basilevskyi Endrödi; 7. O. spinicollis (Harold); 8. O. oberthueri (Clouët); 9. O. costatus Endrödi; 10. O. gestroi (Clouet); 11. O. burgeoni Boucomont; 12. O. setulosus Endrödi; 13. O. villiersi Petrovitz; Figs 14 – 19, right protibiae, 14. O. oberthueri (Clouët), male; 15. O. oberthueri (Clouët), female; 16. O. gestroi (Clouët), male; 17. O. ferenczi Endrödi, male; 18. O. villiersi Petrovitz, male; 19. O. villiersi Petrovitz, female; Figs 20 – 21, aedeagus in lateral view, 20. O. spinicollis (Harold); 21. O. paucus Schmidt.