Pomphopsilla burundiana, Jałoszyński, 2021

Jałoszyński, Paweł, 2021, Four new species of Pomphopsilla Jałoszyński in Rwanda, Burundi and DR Congo (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 4985 (4), pp. 574-581 : 580-581

Pomphopsilla burundiana sp. n.

( Figs 4 , 8 , 15–16 , 17 )

Type material. Holotype: Burundi (Muramvya Province): ♂, two labels: “AFRIKA/ Burundi / Muramvya / 10 km NE Bugarama / 27.2.1985 / leg. Brachat /Mühle” [white, printed]; “ POMPHOPSILLA / burundiana m. / P. Jałoszyński, ‘21 / HOLOTYPUS ” [red, printed] ( MNHW) . Paratypes (3 exx): 3 ♀♀ (one disarticulated, in Canada balsam), same data as for holotype, all with standard yellow “ PARATYPUS ” label (cPJ, MNHW) .

Diagnosis. Frons, vertex and pronotum in both sexes with very dense, but shallow and tiny punctures separated by spaces subequal to their diameters; elytra also with very dense punctures but much shallower, superficial, and diffuse; aedeagus in ventral view with triangular and pointed apex; endophallus with median structure composed of well-sclerotized elongate lateral components and subapical group of irregular, asymmetrically distributed large elongate structures and groups of lightly sclerotized needle-like sclerites; apices of parameres exceeding apex of aedeagus.

Description. Body of male ( Fig. 4 ) elongate, strongly convex, brown with slightly lighter setae. BL 0.93 mm.

Head broadest at large, strongly convex and coarsely faceted eyes, HL 0.13 mm, HW 0.23 mm; vertex strongly transverse, weakly convex, anteriorly confluent with subtriangular and similarly weakly convex frons; supraantennal tubercles small but distinct; punctures on frons and vertex fine but distinct, evenly distributed, separated by spaces subequal to their diameters; setae very short and sparse, recumbent; frontal glands distinct, each situated behind supraantennal tubercle and near mesal margin of eye, nearly twice as wide as single ommatidium. Antennae moderately long, with abruptly broadened club composed of two antennomeres, AnL 0.38 mm, antennomeres 1 and 2 elongate, 3–8 each about as long as broad or indistinctly elongate, 9 slightly elongate, 10 as long as broad, 11 slightly broader and clearly longer than 10, about 1.3 × as long as broad.

Pronotum subrectangular with broadly rounded anterior corners, broadest near anterior third; PL 0.28 mm, PW 0.34 mm. Anterior margin strongly rounded; anterior corners in strictly dorsal view not visible; sides straight in posterior half, indistinctly convergent posterad, distinctly microserrate; posterior corners obtuse-angled; posterior margin with narrow, rounded emargination in front of mesoscutellum, sides of posterior margin weakly concave and weakly converging posterad; pronotal base with two pairs of deep, distinct pits, distance between inner pair much wider than between each inner and outer pit. Punctures on pronotal disc very dense but shallow and small, separated by spaces subequal to their diameters; setae moderately dense, short and weakly suberect; those on lateral margins slightly longer and suberect.

Elytra oval, broadest between middle and anterior third; EL 0.53 mm, EW 0.43 mm, EI 1.24; humeral calli small but distinct, slightly elongate. Punctures very dense but tiny and superficial, diffuse; setae similar to those on pronotum. Hind wings well developed.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 15–16 ) slender, subtrapezoidal, AeL 0.23 mm; diaphragm indistinct; apices of ventral and dorsal walls both triangular, dorsal one much longer and narrower, pointed; endophallus with median structure composed of well-sclerotized elongate lateral components and subapical group of irregular, asymmetrically distributed large elongate structures and groups of lightly sclerotized needle-like sclerites; apices of parameres exceeding apex of aedeagus, each with one long apical and two short subapical setae.

Female. Externally similar to male but with slightly smaller eyes. BL 0.90 mm; HL 0.13 mm, HW 0.23 mm, AnL 0.38 mm; PL 0.28 mm, PW 0.34–0.35 mm; EL 0.50 mm, EW 0.43 mm, EI 1.18. Internal pronotal ‘cavities’ ( Fig. 8 ) drop-shaped, much longer than procoxal cavities.

Distribution. Eastern part of Burundi ( Fig. 17 ).

Etymology. After Burundi, the country name.

Remarks. Adults of this species resemble those of P. punctata , but the punctures on the pronotum are much shallower and less distinct; the aedeagus also differs remarkably.

Figures

FIGURE 17. Distribution of nominal Pomphopsilla species, with aedeagus of each species in ventral view.

FIGURES 1–4. Dorsal habitus of holotype males. Pomphopsilla punctata sp. n. (1); P. cyanguguana sp. n. (2); P. kivuana sp. n. (3); P. burundiana sp. n. (4).

FIGURES 5–8. Prothorax of female in ventral view. Pomphopsilla punctata sp. n. (5); P. cyanguguana sp. n. (6); P. kivuana sp. n. (7); P. burundiana sp. n. (8). Abbreviation: ic, internal ‘cavity‘.

FIGURES 9–16. Aedeagus in ventral (9, 11, 13, 15) and lateral (10, 12, 14, 16) views. Pomphopsilla punctata sp. n. (9–10); P. cyanguguana sp. n. (11–12); P. kivuana sp. n. (13–14); P. burundiana sp. n. (15–16).