Macrocheilus elegantulus Burgeon, 1937

Serrano, Artur R. M., 2023, Afrotropical ground beetles of Macrocheilus Hope, 1838 (Coleoptera, Carabidae) description of four new species and faunistic notes, Zootaxa 5256 (1), pp. 1-35 : 16

Macrocheilus elegantulus Burgeon, 1937

Figs. 5g , 7b

Studied material. 1 male: “(Jligonsera) 06\ (Thi?)\\ Ex. Zool. Mus. Berlin ” (without date) ( MRAC) ; 1 female: “ Zaire: Lualaba \ Ruwe 20.6.1957 \ V. Allard” ( MRAC) .

Remarks. The species is known only from Democratic Republic of the Congo ( Burgeon 1937; Häckel & Farkač 2013). During a visit to MRAC in 1992, we had the opportunity to check a female specimen of this species. Later, the study of a male specimen deposited in the same museum allows providing the diagnosis of its genitalia for the first time.

Male genitalia ( Fig. 7b ). Median lobe long, enlarging gradually from apex to basal bulb, apex long straight and thin (lateral view), acuminated (dorsal view), ostium with one pair of large scaled and slightly sclerotized stripes on dorsum, bending downwards and backwards; left paramere large and rounded, without any distal or marginal tooth.

Distribution. Democratic Republic of the Congo.

Figures

FIGURE 5. Habitus of Macrocheilus (dorsal view). a, M. biguttatus, SEN (ACC); b, M. bimaculatus, GBI (ASC); c, M. clasispilus (holotype, plus labels); d, M. diplospilus (holotype, plus labels); e, M. dorsalis, ZAM (TAC); f, M. dorsiger, BFO (PSC); g, M. elegantulus (holotype, plus labels); h, M. hybridus, ZIM (TAC); i, M. labrosus, RCA (PSC).

FIGURE 7.Aedeagus of Macrocheilus: median lobe and right paramere (left, lateral view) and median lobe (right, dorsal view). a, M. dorsalis, ZAM (TAC); b, M. elegantulus, DOC? (MRAC); c, M. labrosus, RCA (PSC); d, M. longicollis, MOZ (PSC).