Odontolochus burgeoni Boucomont, 1930

Stebnicka, Zdzisława T., 2009, A revision of the African species of Odontolochini Stebnicka & Howden, 1996 (Coleoptera: Scarabaeidae: Aphodiinae), Zootaxa 2230, pp. 1-15 : 11-12

Odontolochus burgeoni Boucomont, 1930

( Fig. 11 )

Odontolochus burgeoni Boucomont, 1930: 404 — Paulian 1942: 126 –127; Endrödi 1964: 369, 375; Dellacasa 1988: 286 (catalog).

Material examined. Holotype female [ The Democratic Republic of the Congo] 'Musee du Congo, Haut-Uele, Yebo-Moto, VII.1926, L. Burgeon'/, ' Odontolochus Burgeoni n.sp. Boucomont det. 1929' ( MRAC); paratypes (3) same data as holotype ( MRAC).

Other specimens (6). The Democratic Republic of the Congo: Bas Congo, Mayidi, 1952, R.P. Van Eyen; Brazzaville Congo, II.1964, Mission A. Descarpentries et A. Villiers 1963–1964 ( MHNG); Dar-Banda Merid. Fort Sibut, Mission Chari-Tschad. XI.1904, J. Decorse; Lomami-Kaniana, III–VI.1932, R. Massard ( MZLU). Cameroon: N’Gaoundiri, 9–10.IX.1978, Ph. Bruneau de Mire ( PBC).

Diagnosis. Pronotum subquadrate, lateral edge sinuate, ended by acutely protruding basal denticle ( Fig. 11 ), median anterior disc elevated, in basal two-thirds with transverse, more or less contiguous ridge, often broken into segments or transverse tubercles. Elytra suboval, striae and strial punctures very fine, shallow; odd intervals including sutural interval sharply carinate, even intervals entirely flat. Protibia in male of different shape than in female, similar to those in O. oberthueri ( Figs 14–15 ).

Description. Length 2.5–2.8 mm. Body dark brown to piceous, dull. Head with shallow, longitudinal punctures. Pronotum subquadrate, anterior angles obtuse, prominent, lateral edge dentate, ended by acutely protruding basal denticle; lateral furrows deep; median anterior disc elevated, in basal two-thirds with transverse, more or less contiguous ridge, often broken into segments or transverse tubercles; punctures very shallow, close, vanishing on sides of pronotum, base without marginal line. Elytra suboval, humeral denticles minute; striae and strial punctures very fine, shallow; odd intervals including sutural interval sharply carinate, even intervals wide, entirely flat, microreticulate. Ventral sclerites alutaceous; median area of mesosternum convex, lateral grooves shallow, paralel-sided, ended at metasternum by obtuse carinae; metasternum from side to side finely, not closely punctate, punctures bearing minute setae; abdominal sternites irregularly, not strongly fluted-punctate. Mesofemora and metafemora parallel-sided, with scattered minute punctures; mesotibiae and metatibiae slightly arcuate; basal metatarsomere longer than upper tibial spur and subequal in length to following three tarsomeres combined.

Male. Protibia like as in O. oberthueri ( Fig. 14 ), slightly narrower than in female.

Female. Lateral teeth of protibia equally separated like as in O. oberthueri ( Fig. 15 ), terminal spur longer than in male.

Remark. Odontolochus burgeoni is one of the smallest African species and easy to distinguish by its wide and flat even elytral intervals.

Distribution. Cameroon, The Democratic Republic of the Congo.

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.