Sinacrulia schillhammeri, Shavrin, 2025

Sinacrulia schillhammeri sp. nov.

( Figs 2 View FIGURES 1–2 , 11–14 View FIGURES 10–13 View FIGURE 14 )

Type material. HOLOTYPE: MYANMAR: ♂ ( Fig. 2 View FIGURES 1–2 ; dissected): ‘MYANMAR: Chin State | W Mindat | Natmataung Nat.P. | km 27.5 rd. to Malupi’ <printed>, ‘ 21°24´19.5´´N 93°48´30.6´´E | 2500 m, 2.- 6.6.2018 | sifting | leg. Schillhammer (226A)’ <printed>, ‘HOLOTYPE | Sinacrulia | schillhammeri sp. nov. | Shavrin A.V. des. 2025’ <red, printed> ( NMW) GoogleMaps .

Description. Measurements: HW 0.35; HL 0.25; OL 0.20; TL 0.09; AL 0.46; PL 0.30; PWmax 0.49; PWmin 0.45; ESL 0.62; EW 0.64; MTbL 0.37; MTrL 0.15 (MTrL 1–4 0.05; MTrL 5 0.10); AW 0.60; AedL 0.25; BL 1.98.

Habitus as in Fig. 2 View FIGURES 1–2 . Body, mouthparts, basal antennomere and antennomeres 7–11 brownish (lateral portions of pronotum and elytra slightly paler); antennomeres 2–6 and legs yellowish (tarsi paler). Middle part of head with irregular, moderately dense and large punctation, coarser between eyes; punctation of pronotum dense, coarser and deeper than that in middle portion of head, finer and sparser in lateral and mediobasal portions; punctation of elytra about as that on pronotum, denser in mediobasal portion; paratergites with fine and moderately dense punctation. Clypeus with distinct microsculpture: transverse in apical and diagonal in mediolateral portions, infraorbital parts with indistinct fine and transverse meshes; pronotum and elytra without meshes; scutellum with fine isodiametric microreticulation; abdominal tergites and paratergites with dense isodiametric microsculpture.

Head with slightly elevated middle and infraorbital portions. Anteriomedian depressions moderately deep and elongate, reaching level of anterior third of eyes. Temples about twice as long as longitudinal length of eyes, with obtuse postocular ridges, each with distance between posterior margin of eye and ridge about as long as three nearest ommatidia. Surface between punctures in middle strongly and irregularly elevated. Distance between ocelli slightly shorter than distance between ocellus and posterior margin of eye. Antenna with elongate antennomeres 1–3, small ovoid antennomeres 4–6 and transverse 7–10; antennomere 3 about as long as and distinctly narrower than 2, 4 twice shorter than 3, about as long as broad, 5 and 6 slightly broader than 3, 7 distinctly longer and more than twice broader than 6, 8 slightly broader than 7, 9 and 10 slightly longer and broader than 8.

Pronotum convex, 1.6 times as broad as long, 1.4 times as broad as head, widest in middle; lateral margins with moderately fine and regular thorn-shaped crenulation. Disc of pronotum with two indistinct oval depressions in mediobasal part. Median surface with regular, longitudinally and diaginally elevated portions between punctures; each lateral portion with moderately broad and curved elongate elevation.

Elytra convex, twice as long as pronotum, slightly depressed mediobasally; hind margins somewhat straight. Surface between punctures with coarse elevations: diagonal and transverse in mediobasal part, and longitudinal in lateral and medioapical portions.

Male. Posterior margin of abdominal tergite VIII truncate ( Fig. 12 View FIGURES 10–13 ). Posterior margin of abdominal sternite VIII concaved ( Fig. 13 View FIGURES 10–13 ). Aedeagus ( Fig. 10 View FIGURES 10–13 ) with broadened basal part, slightly narrowed toward middle, with elongate and narrow accessory plates with rounded apices; median lobe broad, with widely rounded lateral margins in about middle, strongly narrowed toward subacute apex; each paramere from broadest basal part gradually narrowed toward rounded apex, reaching preapical part of median lobe, with subtriangular tooth slightly above middle on inner margin, with two short apical and a row of six short setae along inner margin, outer margin of each paramere with two short setae in preapical portion; internal sac short and weakly sclerotized, with long flagellum, spirally folded in basal portion and with broadened elongate structure in middle. Lateral aspect of aedeagus as in Fig. 11 View FIGURES 10–13 .

Female unknown.

Comparative notes. Based on the similar shape of the body, transverse antennomere 7, similar shape of the crenulation of lateral margins of the pronotum, S. schillhammeri sp. nov. is related to the Chinese S. forteripunctatata, from which it can be distinguished by the paler coloration of the body, antennae and legs, the stronger elevations between punctures on the pronotum and the elytra, the presence of longitudinal depressions of the pronotum, slightly shorter elytra, and narrower and slightly longer parameres. Also see the key below.

Distribution. Sinacrulia schillhammeri sp. nov. is known only from the type locality in Chin State of Myanmar ( Fig. 14 View FIGURE 14 ).

Etymology. Patronymic; the species is named to honour Harry Schillhammer, collector of the holotype and the host of 38th Staphylinoidea Meeting (29.05– 01.06.2025) in Vienna.

Bionomics. The holotype was collected at an altitude of 2500 m by sifting wet wrotten leaves under a heap of dead branches at the edge of a disturbed forest along the road to Matupi.