Euconnus (s. str.) pseudobaoshanus, Jałoszyński, 2024

Jałoszyński, Paweł, 2024, Four new species of the Euconnus taiwanus group from China (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 5536 (1), pp. 178-184 : 180-182

Euconnus (s. str.) pseudobaoshanus sp. nov.

( Figs 2 , 9–12 )

Type material studied. Holotype ( CHINA: Yunnan): ♂, two labels: “CHINA: Yunnan [ CH07-14 A], Baoshan / Pref. Gaoligong Shan, 33 km SE / Tengchong, 2100-2200 m, 24°51’22’’N, / 98°45’36’’E, decid. forest, litter, wood, / fungi sifted, 4.VI. 2007, M. Schülke ” [white, printed], “ EUCONNUS (s str.) / pseudobaoshanus m. / P. Jałoszyński 2024 / HOLOTYPUS” [red, printed] ( MNB).

Diagnosis. Antennal club trimerous with antennomere 9 distinctly narrower than 10; males lacking secondary sexual characters; aedeagus with bifurcate apex, its lateral portions rounded and elongate, and median region subtrapezoidal with deep U-shaped median emargination.

Description. Body of male ( Fig. 2 ) elongate, strongly convex; pigmentation moderately dark brown, pronotum slightly darker than head and elytra, tarsi and maxillary palps clearly lighter than elytra; body covered with light brown setae; BL 1.30 mm.

Head much narrower than pronotum, broadest across eyes, HL 0.30 mm, HW 0.23 mm; tempora in dorsal view 3 times as long as eyes, behind eyes strongly and evenly converging posteriorly, posterior margin of vertex narrowly rounded and distinctly bulging posterodorsally. Eyes moderately large and weakly convex, in lateral view weakly oval. Frons and vertex with unremarkable, fine punctures, glossy; setae sparse, short and suberect, tempora and posterior margin of vertex covered with dense thick bristles. Antennae short and compact, AnL 0.43 mm, scape and pedicel each distinctly elongate, antennomeres 3‒7 each almost as long as wide, 8 weakly transverse, 9 and 10 each strongly transverse, 11 indistinctly longer than 9 and 10 combined, indistinctly elongate.

Pronotum broadest between middle and posterior third; PL 0.33 mm, PW 0.28 mm. Pronotal base with inner pair of small circular pits connected by indistinct transverse groove and with outer pair of barely discernible small pits. Punctures and setae on pronotal disc similar to those on frons and vertex; sides of pronotum with dense thick bristles.

Elytra together oval, broadest slightly anterior to middle; EL 0.68 mm, EW 0.48 mm, EI 1.42; humeral calli small, elongate, each mesally demarcated by short elongate impression; elytral apices separately rounded. Punctures indistinct, superficial and unremarkable; setae sparse and suberect.

Hind wings long and functional.

Legs slender, unmodified, all tibiae slightly curved inwards.

Aedeagus ( Figs 9–12 ) elongate, AeL 0.25 mm; median lobe in ventral view broadest in subapical region, with lateral margins convex in subapical third, apex bifurcate, with widely separated elongate lateral lobes broadly rounded distally, apical margin between them with deep U-shaped median emargination; endophallus symmetrical, with darkly sclerotized median structure flanked by curved elongate sclerites. Parameres slender, not reaching apex of median lobe, each with several short apical and subapical setae.

Female. Unknown.

Distribution. S China (Yunnan Province).

Etymology. The adjective pseudobaoshanus refers to the external similarity to E. baoshanus ; both species have been collected in the Baoshan region.

Remarks. The apical aedeagal structure in E. pseudobaoshanus is unique, no other species of the taiwanus group has a deep U-shaped median emargination in combination with elongate lateral lobes rounded at apices.

Figures

FIGURES 1‒4. Dorsal habitus of holotype males. Euconnus baoshanus sp. nov. (1), E. pseudobaoshanus sp. nov. (2), E. tianmushanus sp. nov. (3), and E. pingbianensis sp. nov. (4).

FIGURES 5‒12. Aedeagus in ventral (5, 7, 9, 11) and lateral (6, 8, 10, 12) views. Euconnus baoshanus sp. nov. (5‒8), and E. pseudobaoshanus sp. nov. (9‒12).