Bisayodes hure Wakimura & Jałoszyński, 2023

Jałoszyński, Paweł & Wakimura, Ryotaro, 2023, A new genus, new species and new records of Eucinetidae in Japan and Taiwan (Coleoptera), Zootaxa 5351 (1), pp. 122-138 : 129-130

publication ID	https://doi.org/ 10.11646/zootaxa.5351.1.5
publication LSID	lsid:zoobank.org:pub:08CAFDFE-D4CF-4E5A-A173-3DA9F19F5FA5
DOI	https://doi.org/10.5281/zenodo.8391534
persistent identifier	https://treatment.plazi.org/id/03BF87BF-FFA4-FFE0-A7E0-FAE4FADE8E2A
treatment provided by	Plazi
scientific name	Bisayodes hure Wakimura & Jałoszyński
status	sp. nov.

Treatment

Bisayodes hure Wakimura & Jałoszyński sp. n.

( Figs 1 View FIGURES 1‒4 , 5–22 View FIGURES 5‒6 View FIGURES 7‒12 View FIGURES 13‒19 View FIGURES 20‒22 , 37 View FIGURES 37‒40 , 41–42 View FIGURES 41‒42 )

Type material studied. Holotype ( JAPAN): ♁, two labels: “ Japan: Hokkaido, Hiroo-gun, / Hiroo-cho , Bitatanunke [locality name repeated in Japanese characters] / 42.1667886;N 143.3203257;E / 2022. VI. 5. R.Wakimura leg.”, “ BISAYODES / hure Wakimura / & Jałoszyński / HOLOTYPUS” ( HUMS) . Paratypes (23 exx.): 1 ♀, same data as for holotype ( HUMS) ; 4 ♀♀, same data as for holotype, except for 2022. X. 10 (cPJ, HUMS, NSMT) ; 1 ♁, same data as for holotype, except for 2022. X. 23 ( HUMS) ; 5 ♀♀, same data as for holotype, except for 2023. VII. 1 (cRW, HUMS) ; 6 exx., same data as for holotype, except for 2023. VII. 9 ( NSMT) ; 5 exx., same data as for holotype, except for 2023. VII. 9, N. Hirakizawa leg. ( HUMS) ; 1 ex., same data as for holotype, except for 2023. VIII. 31 (cRW) .

Diagnosis. As for genus, vide supra.

Description. Body of male ( Figs 1 View FIGURES 1‒4 , 5–6 View FIGURES 5‒6 ) short oval, strongly convex dorsally and flattened ventrally, brown with strong reddish hue, appendages slightly lighter than body, setae slightly lighter than cuticle; BL 1.55 mm.

Head ( Figs 7–9, 11–12 View FIGURES 7‒12 ) broadest at eyes, HL 0.20 mm, HW 0.43 mm; lateral margins of head behind eyes in dorsal view straight, vertex and frons together weakly convex, strongly transverse; punctures on dorsum small, sharply marked and evenly distributed, separated by spaces 2–3 × as wide as diameters of punctures; setae short and sparse, suberect, directed anteriorly. Genae ( Fig. 8 View FIGURES 7‒12 ) with sparse setae along ventral margin of eye, postgenae asetose; gula and submentum asetose; mentum with short and sparse setae distributed along lateral and anterior marginal carinae.

Antennae ( Figs 10–12 View FIGURES 7‒12 ; in Fig. 10 View FIGURES 7‒12 shown in lateral view, in Figs 11 and 12 View FIGURES 7‒12 some parts of antennae are curved above and beneath the plane of illustration, so the shapes and proportions are affected; description was based on observations of specimens) distinctly longer than length of entire head capsule, AnL 0.38 mm; scape much broader than pedicel, about twice as long as broad, pedicel 2.5 × long as broad, antennomeres 3 and 4 subequal in length, each 1.5 × as long as broad, antennomere 5 about as long as broad; 6–8 each distinctly transverse and gradually increasing in width, 9–11 form loosely assembled club, 9–10 each transverse, 11 slightly elongate and about as long as 9–10 combined.

Pronotum ( Figs 1 View FIGURES 1‒4 , 5 View FIGURES 5‒6 ) less convex than elytra, broadest at posterior corners, PL 0.35 mm, PW 0.75 mm. Anterior and lateral margins strongly and evenly rounded; posterior corners strongly projecting posteriorly and sharp-angled; posterior margin bisinuate, medially strongly and evenly convex. Punctures and setae on pronotal disc similar to those on frons and vertex. Hypomera asetose and virtually impunctate.

Elytra ( Figs 1 View FIGURES 1‒4 , 5 View FIGURES 5‒6 ) together oval, broadest near anterior third and strongly narrowing posteriorly to broadly subtriangular apex; EL 1.00 mm, EW 0.85 mm, EI 1.18. Punctures and setae similar to those on frons and vertex; epipleura similarly punctate and setose as elytral disc.

Hind wings vestigial, each as long as only 1/5 of body width, about 3 × as long as wide.

Legs ( Figs 6 View FIGURES 5‒6 , 20–22 View FIGURES 20‒22 ) short, robust, flattened dorsoventrally. Profemora with row of dense, thick setae along anterior margin in basal half of ventral surface ( Fig. 21 View FIGURES 20‒22 ); remaining legs unmodified. Apical spurs on mesotibiae ( Fig. 22 View FIGURES 20‒22 ) subequal in length, with rounded and slightly curved apices; spurs on metatibiae ( Fig. 20 View FIGURES 20‒22 ) slightly more unequal in lengths and gradually tapering to pointed apices.

Aedeagus ( Fig. 37 View FIGURES 37‒40 ) strongly elongate, AeL 0.40 mm; penis tapering towards subtriangular apex, with undulate lateral margins; parameres massive, at base broader than penis, tapering towards rounded apices.

Female. Externally indistinguishable from male. BL 1.55–1.70 mm; HL 0.20 mm, HW 0.45 mm, AnL 0.43– 0.45 mm; PL 0.35–0.38 mm, PW 0.75–0.78 mm; EL 1.00– 1.13 mm, EW 0.85–0.93 mm, EI 1.18–1.25.

Distribution. Northern Japan: Hokkaidô.

Etymology. The adjective hure is taken from the Ainu-itak language of Ainu people that inhabit Hokkaidô; its meaning is “red”, referring to the reddish hue of adult beetles.

Remarks. Specimens used in this study were collected from leaf litter under and around Sasa sp. (Poaceae) , Quercus crispula Blume (Fagaceae) and other plants in cool-temperate deciduous broadleaved forests ( Figs 41–42 View FIGURES 41‒42 ). Living individuals of Bisayodes hure were observed making leaping movements, as other Eucinetidae .