Pinocolis alacus, Struyve, 2024

Struyve, Tim, 2024, Revision of the Afrotropical Pinophilina (Coleoptera: Staphylinidae: Paederinae) Part 1: genera, Pinachenium, Pinoplanus, Pinobelus and Pinocolis, Belgian Journal of Entomology 152, pp. 1-75 : 40-41

Pinocolis alacus sp. nov.

Figs 8 E , 14 I-J urn:lsid:zoobank.org:act:70F014A2-4610-4249-8CFD-EA6C0E51C242

TYPE MATERIAL EXAMINED

Congo-Kinshasa: Kivu: T. Kalehe, Bitale, N.O. Kahusi, 1600 m, 29: VI/1951, N. Leleup, récolté dans l’humus: 1 ♂ holotype ( RBINS) ; Kivu: T. Kalehe, Bitale, N.O. Kahusi, 1600 m, 29: VI/1951, N. Leleup, récolté dans l’humus: 1 ♂ paratype ( RMCA) .

ETYMOLOGY

The only two individuals were found at Kalehe near lake Kivu. “a lacus” is Latin for “from the lake”.

DESCRIPTION

13 mm, length of the forebody 5 mm. Coloration: body black with margin of the tergites and elytra dark brown. Legs, palps and abdominal segment IX orange, antennae in the darker with or without two brighter antennomeres X and XI. Head with dense, confluent macropunctation and many micropunctures, the V-shaped line on the head only visible as a small interruption of the macropunctation. Head with no microsculpture. Labrum with a shallow median circular excision. Pronotum the widest near the anterior third, sides rounded, 1.8 mm wide and 1.85 mm long, macropunctation very dense and without microsculpture, near the posterior part with a smooth middle line. Elytra 1.75 mm wide and 1.7 mm long, punctation very dense, without microsculpture. Wings reduced. Abdomen with microsculpture. Posterior margin of sternite VIII weakly protruding in males.

Aedeagus 2.2 mm, without the protruding internal copulatory pieces. Parameres only near the base near each other, rather tick, tip rather pointed. Dorsal side of the median lobe straight. Tip of the median lobe flat with a rounded incision and so two rounded tips. Sides of the median lobe folded upwards, getting larger towards the base with an irregular incision on the position where normally the basal process is with many other species of the punctatus group, without keels or lateral protrusions.

COMMENTS

Externally not distinguishable from P. altivagans , P. rwandensis and P. narcisse . Punctation on the head and pronotum of P. narcisse and P. alacus a little denser compared with the P. altivagans and P. rwandensis , but with limited material available this could be not reliable. Identification is only reliable with aedeagus.

Figures

Fig. 8. A-F, Head, dorsal view. A, Pinocolis congoensis (Gridelli, 1928). B, P. semiopacinus (Fagel, 1963). C, P. singularis (Cameron, 1952). D, P. annabellae (Lecoq, 1990). E, P. alacus sp. nov. F, P. altivagans (Bernhauer, 1934). Scale bar: 1 mm.

Fig. 14. A-J, aedeagus, ventral and lateral view. A-B, Pinocolis congoensis (Gridelli, 1928). C-D, P. semiopacinus (Fagel, 1963). E-F, P. singularis (Cameron, 1952). G-H, P. annabellae (Lecoq, 1990). I-J, P. alacus sp. nov. Scale bar: 1 mm.