Stenichnodes (Stenichnodes) saheliensis Franz

Jałoszyński, Paweł, 2015, Taxonomy of the Alloraphes-Stenichnaphes-Parastenichnaphes complex: Stenichnodes complicates the picture (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 3990 (2), pp. 279-286 : 284-286

Stenichnodes (Stenichnodes) saheliensis Franz

( Figs 1–7 )

Stenichnodes saheliensis Franz, 1966: 626 .

Type material. Holotype: REPUBLIC OF CHAD: ♂, three labels ( Fig. 2 ): "Douguia am Chari / Tschadrepublik / lg.H.Franz 1962" [white, printed], " Stenichnodes / saheliensis m." [red, handwritten], " Holotypus " [red, handwritten] ( NHMW).

Revised diagnosis. This is the only known species of the nominotypical subgenus and can be identified using subgeneric characters and the unique aedeagus.

Redescription. Body of male ( Fig. 1 ) elongate and slender, strongly convex, yellowish brown, covered with yellowish vestiture; BL 0.79 mm.

Head broadest at large, strongly convex and moderately coarsely faceted bean-shaped eyes, HL 0.10 mm, HW 0.15; tempora in dorsal view barely discernible; vertex weakly convex and anteriorly confluent with frons; frons flattened, its anterior portion in front of eyes subtriangular; supraantennal tubercles indistinct. Vertex and frons with shallow, superficial and diffused sparse punctures; setae fine, nearly recumbent. Antennae slender, AnL 0.30 mm; antennomeres I–II distinctly elongate, III slightly transverse, IV–VII each about as long as broad, VIII slightly transverse, IX–X distinctly transverse, XI about 1.2× as long as broad, with rounded apex.

Alloraphes Stenichnaphes Stenichnodes s. str. Stenichnodes (Parastenichnaphes)

notosternal sutures complete internalized anteriorly internalized anteriorly complete Pronotum ( Fig. 1 ) bell-shaped, broadest near anterior third; PL 0.21 mm, PW 0.23 mm. Anterior margin and lateral margins in anterior half rounded; sides slightly concave behind middle; posterior margin weakly arcuate; posterior pronotal corners obtuse-angled and blunt; base with shallow but distinct transverse groove at each side deepened to form small and indistinct lateral pits and with external pair of indistinct pits not connected to groove. Punctures on pronotal disc inconspicuous, fine and sparse; setae sparse, short and recumbent to suberect.

Elytra ( Fig. 1 ) more convex than pronotum, oval, broadest slightly anterior to middle; EL 0.48 mm, EW 0.35, EI 1.36; humeral calli weakly marked, elongate, basal impression on each elytron indistinct; apices separately rounded. Punctures on elytra slightly more distinct than those on pronotum but still fine, shallow and unremarkable; setae sparse, short, recumbent to suberect. Hind wings well developed.

Legs ( Fig. 1 ) long and slender; all tibiae nearly straight.

Aedeagus ( Figs. 6–7 ) elongate and thin-walled, with asymmetrical assemblage of short apical projections and truncate base with circular diaphragm internally connected to long apophysis; parameres absent; AeL 0.20.

Female. Unknown.

Distribution. Afrotropical: Chad Republic.

Figures

FIGURES 1 – 2. Doral habitus (1) and original set of labels (2) of the holotype male of Stenichnodes saheliensis Franz.

FIGURES 3 – 7. Morphological structures of Stenichnodes saheliensis Franz. Head in ventral view (3), prothorax in ventral view (4), pterothorax and abdomen in ventral view (5), aedeagus in ventral (6) and lateral (7) views. Abbreviations: ar, anterior ridge of mesoventrite; bst, basisternal part of prosternum; gal, galea; gp, gular plate; gs, gular suture; hr, hypostomal ridge; hy, hypomeron; hyr, hypomeral ridge; lac, lacinia; lmfa, lateral metafurcal arm; lp 3, labial palpomere III; lss, lateral suture of submentum; mcp, mesocoxal projection; md, mandible; mn, mentum; mscc, mesocoxal cavity; mscs, mesocoxal socket; msvp, mesoventral intercoxal process; mtvc, metaventral lateral carina; mtvp, metaventral intercoxal process; mxp, maxillary palpomere; nss, pronotosternal suture; occ, occipital constriction; pcc, procoxal cavity; pcs, procoxal socket; pff, profurcal fovea; pr, procoxal rest; pre, prepectus; psp, prosternal process; smn, submentum; v 3, metaventrite.