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

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

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

( Figs 3 , 13–16 )

Type material studied. Holotype ( CHINA: Zhejiang): ♂, two labels: “CHINA: Zhejiang [ CH07-36 ], West / Tianmu Shan N.R., way to peak of / immortals, 30°20’34’’N, / 119°25’51’’E, / 1100-1200 m, prim. mixed forest, litter, / moss, sifted, 15.VI.2007, M. Schülke ” [white, printed], “ EUCONNUS (s str.) / tianmushanus 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 forming strongly elongate Y-shaped dorsal apical plate projecting distally beyond apices of lateral lobes.

Description. Body of male ( Fig. 3 ) elongate, strongly convex; pigmentation uniformly brown, except for distinctly lighter tarsi and maxillary palps; body covered with light brown setae; BL 1.24 mm.

Head much narrower than pronotum, broadest across eyes, HL 0.29 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 0.45 mm, scape and pedicel each distinctly elongate, antennomeres 3‒8 each distinctly 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 large, circular pits 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 13–16 ) weakly elongate, conspicuously small in relation to body length, AeL 0.16 mm; median lobe in ventral view broadest in sub-basal region, with lateral margins convex in subapical third, apex bifurcate, with widely separated elongate lateral lobes broadly rounded distally, each lobe with single long seta directed distally, ventral apical plate strongly elongate and slender, distally bifurcate, Y-shaped; endophallus symmetrical, with darkly sclerotized median structure and pair of curved lateral sclerites nearly perpendicular to the long axis of aedeagus. Parameres slender, not reaching apex of median lobe, each with broadened apical region bearing four long apical and subapical setae.

Female. Unknown.

Distribution. SE China (Zhejiang Province).

Etymology. The adjective tianmushanus refers to the Tianmu Mountain (Tianmushan) in Lin’an County, Zhejiang, China.

Remarks. This species can be easily identified by the unique male genital structure; especially by the Y-shaped ventral apical plate.

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).