Thyreocephalus gabonensis Coiffait, 1968

Janák, Jiří & Bordoni, Arnaldo, 2015, Revision of the genus Thyreocephalus and description of Afrus gen. nov. of Africa south of the Sahara (Coleoptera: Staphylinidae: Staphylininae), Zootaxa 4038 (1), pp. 1-94 : 76-77

Thyreocephalus gabonensis Coiffait, 1968

( Fig. 195–200 )

Thyreocephalus gabonensis Coiffait, 1968: 154 ; Herman, 2001: 3763.

Type locality. Gabon, Bélinga.

Type material examined. Holotype ♂: GABON: “Belinga 93, 12.2.63, H. Coiffait”, “Mission biologique, au Gabon, P. P. Grassé Directeur”, “ Holotype ”, “ Thyreocephalus gabonensis Coiffait 1967 ” ( MNHNP). Paratypes: 4 ♀: GABON: “Belinga 52, 27.2.63, H. Coiffait”, “ Paratype ” ( MNHNP).

Additional material examined. EQUATORIAL GUINEA: 1 ♂: Guinea Espaňola, Lago Atonguain, J. Mateu ( JJRC).

Redescription. Body length 14–16 mm long; length from anterior margin of head to posterior margin of elytra: 7–8 mm. Dark reddish brown with black head and lighter abdomen; deflexed sides of elytra yellowish; genital segment reddish, antennae brown, legs reddish brown. Head large and wide, with rounded sides and largely rounded posterior angles. Eyes small and flat. Surface shiny, with fine, deep, dense punctation, apart from clypeus and posterior margin. Head and pronotum and related punctation as in Fig. 196 ; labrum as in Fig. 197 . Pronotum shorter and narrower than head, with rounded anterior angles and sinuate sides. Surface shiny, with micropunctation. Elytra narrow, narrower than pronotum and as long as it, with marked humeral angles. Surface shiny, with punctation arranged in three series, one near suture, one median and one lateral. Abdomen with transverse micro-striation and fine and sparse punctation.

Male. Tergite 10 and sternite 9 of male genital segment as in Figs. 198, 199 . Aedeagus ( Fig. 200 ) 1.9–2.7 mm long, with triangular median lobe; parameres symmetrical; inner sac ribbon-like, very narrow and short, covered with small scales.

Differential diagnosis. Thyreocephalus gabonensis differs from the similarly colored T. marginipennis in the larger body, wider, sub-ovoid head and different shape of the aedeagus.

Bionomics. The species was collected under bark.

Distribution. The species is distributed in Gabon and Equatorial Guinea ( Fig. 195 ).

Figures

FIGURE 195. Distribution of species in Thyreocephalus mocquerysi group (▲ = T. gabonensis Coiffait, ● = T. mocquerysi (Fauvel )).

FIGURES 196 – 200. Thyreocephalus gabonensis Coiffait; 196, head and pronotum; 197, labrum; 198, male tergite 10; 199, male sternite 9; 200, aedeagus.