Baraxina dzumacana, Hlaváč & Jałoszyński, 2021

Hlaváč, Peter & Jałoszyński, Paweł, 2021, The Pselaphinae (Coleoptera: Staphylinidae) of New Caledonia and Loyalty Islands. IV. Revision of the genus Baraxina Raffray, 1896, Zootaxa 4941 (2), pp. 193-216 : 208

Baraxina dzumacana sp. n.

( Fig. 28 )

Material studied. Holotype: ♁: NEW CALEDONIA, with one label: “ NEW CALEDONIA 9913 / 22°03’S x 166°28’E / Mt. Dzumac road, 700m / 1 Dec 2000, GB Monteith / Pyrethrum, trunks & logs“ [white, printed] ( MNHN) . Paratypes (2 ♁♁, 4 ♀♀): 1 ♁, 3 ♀♀: same data as for holotype ( QMBA, MNHW, PCPH); 1 ♁, 1 ♀: one label: “ NEW CALEDONIA 8736 / 22°03’S x 166°28’E / Mt. Dzumac road, 700m / 1 Nov 2001, G.B. Monteith / Pyrethrum, trunks & log“ [white, printed] ( QMBA, PCPH) .

Diagnosis. Profemora in male with curved basal spine; external apical margin of palpomere 2 evenly rounded, not projecting; antennomeres 9 and 10 each clearly transverse; transverse basal impression of first visible abdominal tergite well-defined, with discal carinae long, reaching basal third of tergite; aedeagus nearly symmetrical, with apex of median lobe undivided, endophallic sclerites arranged in two elongate lateral groups separated proximally and touching distally; each paramere with rounded apex and two apical setae.

Description. Body bicoloured, head, maxillary palpi and pronotum brownish-black; elytra, abdomen, antennae and legs reddish-brown. Body length 2.00– 2.06 mm, maximum width 0.82–0,85 mm.

Head 0.95–1.05 as long as wide. External apical margin of maxillary palpomere 2 evenly rounded, not projecting; palpomere 3 subrectangular, external margin rounded; palpomere 4 0.32–0.33 mm long, 4.57–4.71 times as long as wide.

Antennae 0.98–1.00 mm long, scape 1.71–1.86 times as long as pedicel; pedicel as long as antennomere 3; antennomeres 2–4, 6, 7 and 9 subequal in length; antennomere 5 1.38 times as long as 6; antennomere 7 1.45 times as long as 8; antennomere 9 transverse, 1.28–1.30 times as wide as long; antennomere 10 1.10–1.15 times as wide as long, 1.43 times as long as 9; antennomere 11 0.22 mm long, asymmetrical, with basal notch.

Pronotum 1.15–1.25 times as wide as long, 1.00–1.05 times as long and 1.15–1.25 as wide as head.

Elytra 1.44–1.54 times as long as pronotum, 1.28–1.33 times as wide as long.

First visible abdominal tergite (IV) with well-defined basal impression, discal carinae long, reaching basal third of tergite.

Profemora with basal spine curved; protibiae in apical fourth with spine.

Aedeagus ( Fig. 28 ) in dorsal view nearly symmetrical, 0.48 mm long, apex of median lobe undivided; endophallic sclerites arranged in two elongate lateral groups separated proximally and touching distally; each paramere with rounded apex and two apical setae.

Etymology. This species is named after Mt. Dzumac, the type locality.

Distribution. New Caledonia, Southern Province.

Remarks. All studied specimens were collected in a tropical forest by fogging trunks and logs with pyrethrum.

Figures

FIGURES 17–30. Aedeagus in dorsal (17, 18, 20, 22–24, 26–29) and lateral (19, 21, 25, 30) views. Baraxina francoisi Raffray (17); B. amieuana sp. n. (18–19); B. grimbacheri sp. n. (20–21); B. kanakorum sp. n. (22); B. rutai sp. n. (23); B. aoupinica sp. n. (24–25); B. asymmetrica sp. n. (26); B. burwelli sp. n. (27); B. dzumacana sp. n. (28); B. jenisi sp. n. (29–30).