Tychobythinus besucheti, Sabella, Giorgio, Nouira, Vera D’Urso Said, Souissi, Rhida & Besuchet, Claude, 2013

Sabella, Giorgio, Nouira, Vera D’Urso Said, Souissi, Rhida & Besuchet, Claude, 2013, A review of Tychobythinus theryi species group with description of a new species from Algeria (Coleoptera, Staphylinidae, Pselaphinae), Zootaxa 3701 (1), pp. 63-75 : 74

Tychobythinus besucheti sp. n. Sabella

( Figs. 18–21 )

Type material. Holotype, male. NORTHEASTERN ALGERIA. Annaba province: Bône (old name of Annaba), XI.1930 (H. Normand) (MHNG). Paratype, male, same data of holotype (MHNG).

Description. Body length 1.15–1.20 mm, pubescence consists of long and flattened setae (0.125–0.130 mm) on head, pronotum, elytra and abdomen, other suberected setae shorter (length: 0.030–0.040 mm) on antennae and legs. Tegument smooth and glossy.

Head ( Fig. 18 ) longer (0.225 mm) than wide (0.200 mm), frontal lobe wide 0.110 mm its dorsal surface glossy with some punctures and well impressed median sulcus. Clypeal carina evident, reaching ocular region, well visibile median occipital carina reaching posterior edge of vertexal foveae, tempora rounded. Gular region convex entirely traversed by evident median longitudinal carina, its surface glossy. Segment II of maxillary palpi with 24– 26 tubercles, segment III longer than wide with 4–6 tubercles, last segment of maxillary palpi ( Fig. 19 ) more than 3 times longer (0.250–0.255 mm) than wide (0.075 mm), its lateral margin straight. Antenna ( Fig. 20 ) 0.650–0.660 mm long with scape more than 4 times longer (0.175–0.180 mm) than wide (0.038–0.039 mm), antennomere II slightly ovoid and asymmetric, longer (0.600 mm) than wide (0.350 mm), antennomeres III–VII longer than wide, III distinctly longer than wide, IV and V subequal in size, slightly shorter than III, VI slightly longer than wide, VII longer than VI, VIII as long as wide. Antennomeres IX–X distinctly wider than long, XI about 2 times longer than wide, and more than 1.5 times longer than combined length of IX and X.

Pronotum slightly wider (0.300 mm) than long (0.285–0.290 mm), widest in forequater, pleural carina well visible, not very deep antebasal sulcus.

Elytra width 0.475–0.480 mm, lenght 0.380–0.390 mm.

Metasternum with surface smooth and glossy.

Legs elongated, protrochanters with 4–6 tubercles; profemora with 12–14 small tubercles, article II of protarsi slightly compressed laterally. Metatibiae 0.425–0.430 mm long.

Aedeagus ( Fig. 21 ) 0.320–0.330 mm long ovoid with parameres relatively long, sinuate and convergent, apically rounded and narrowed, bearing two bristles each. Symmetrical internal sac.

Female. Unknown.

Comparative notes. T. besucheti sp. n. is very similar to T. peyerimhoffi from which it is distinguished by the narrower head frontal lobe (width 0.11 mm in n. sp., 0.125 mm in peyerimhoffi ), the shorter antennae (length 0.650–0.660 mm in T. besucheti 0.680–0.690 mm in T. peyerimhoffi ) and by the features of adeagus (cfr. Figs 17 and 21 ).

Figures

FIGURES 18 – 21. Tychobythinus peyerimhoffi. Scale: 0, 1 mm. 18 — Head, schematic drawing. 19 — Left maxillary palpus, holotype. 20 — Right antenna, holotype. 21 — Aedeagus dorsal view, holotype.

FIGURES 14 – 17. Tychobythinus peyerimhoffi. Scale: 0, 1 mm. 14 — Head, schematic drawing. 15 — Left maxillary palpus, lectotype. 16 — Right antenna, lectotype. 17 — Aedeagus dorsal view, lectotype.