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

Jałoszyński, Paweł, 2024, Four new species of the Euconnus taiwanus group from China (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 5536 (1), pp. 178-184 : 183-184

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

( Figs 4 , 17–20 )

Type material studied. Holotype ( CHINA: Yunnan): ♂, two labels: “CHINA:Yunnan, SE Pingbian, / 22°54’31’’N, / 103°41’44’’E, 2100 m, / primary subtropical broad-lived / forest, litter sifted, 28. VIII.2014, / leg. M. Schülke [ CH14-22a ]” [white, printed], “ EUCONNUS (s str.) / pingbianensis 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 processes rounded and elongate and apical margin between them subtrapezoidal with shallow median emargination.

Description. Body of male ( Fig. 4 ) elongate, strongly convex; pigmentation dark brown, with elytra slightly lighter than head and pronotum, tarsi and maxillary palps distinctly lighter than elytra; body covered with light brown setae; BL 1.25 mm.

Head much narrower than pronotum, broadest across eyes, HL 0.30 mm, HW 0.23 mm; tempora in dorsal view nearly 4 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 3‒10 each distinctly transverse, 11 slightly 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 pits connected by indistinct transverse groove, and with pair of much smaller outer 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 0.63 mm, EW 0.48 mm, EI 1.32; 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 17–20 ) elongate, AeL 0.20 mm; median lobe in ventral view broadest near middle, with lateral margins convex in subapical third, apex bifurcate, with widely separated strongly elongate lateral lobes broadly rounded distally, apical margin between them shallowly emarginate medially; endophallus symmetrical, with darkly sclerotized median structure and pair of weakly curved lateral sclerites nearly parallel to the long axis of aedeagus. Parameres slender, not reaching apex of median lobe, each with several apical and subapical setae.

Female. Unknown.

Distribution. S China (Yunnan Province).

Etymology. The adjective pingbianensis refers to the Pingbian Miao Autonomous County, Honghe Hani and Yi Autonomous Prefecture, Yunna, China.

Remarks. The ventral apical plate divided into a pair of lateral elongate and apically rounded processes in E. pingbianensis resembles that of E. pseudobaoshanus . However, the general shape of the aedeagus and its endophallic structures are clearly different.

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 13‒20. Aedeagus in ventral (13, 15, 17, 19) and lateral (14, 16, 18, 20) views. Euconnus tianmushanus sp. nov. (13‒16), and E. pingbianensis sp. nov. (17‒20).