Ziminellia quadrangula Xue & Nihei, 2025

Ziminellia quadrangula Xue & Nihei , sp. nov.

( Figs 1–8 View FIGURES 1–2 View FIGURES 3–8 )

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Diagnosis. Frons about 0.8 times as wide as postpedicel. Four postsutural dorsocentral setae, the two anteriormost shorter than the posterior two, 1 intrapostalar seta. Wing pale brown without dark clouds, subcosta bow-shaped; distal 1/3 of upper calypter opaque white, lower calypter whitish. Mid tibia with 4–5 posteroventral setae, anterodorsal seta absent; hind femur with 5 anteroventral setae on apical half, 3 lower ones longer. Cerci with four pairs of processes on lower margin.

Description. Body length 7.4–7.6 mm.

Male. Head ( Figs 3–4 View FIGURES 3–8 ). Eye with minute and scattered hairs. Frons about 0.8 times as wide as postpedicel, 5–6 pairs of frontal setae on lower 1/3 (the uppermost 1–2 shorter), 6–7 pairs of proclinate orbital setae, fronto-orbital plate and parafacial with grayish white pruinosity, parafacial about 0.6 times as wide as postpedicel. Gena black, with a few blue-gray pruinosity, slightly shiny, genal hairs and postgenal hairs all black, genal height about 1/5 of eye height. Antenna black, postpedicel 2.5–2.7 times as long as wide, 1.8–2.0 times as long as pedicel, arista plumose, the longest aristal hairs about twice of postpedicel width. Vibrissal angle situated behind frontal angle. Prementum with pruinosity, about twice as long as wide; palpus brownish black, about 1.5 times prementum length; labellum large.

Thorax ( Figs 1–2 View FIGURES 1–2 ). Black in ground color, covered with dense pruinosity; postpronotal lobe with dense silvergray pruinosity; scutum with two broad black vittae, slightly shiny, not reaching the suture; scutum with one pruinose vitta in the middle (narrower than lateral black vitta) which is broader after the suture. 1+2 acrostichal setae; 3+4 dorsocentral setae (the two anteriormost postsutural setae shorter than the posterior ones); 0+1 intra-alar seta; 1 supra-alar seta; prealar seta 0.6–0.7 times as long as posterior notopleural seta; 3 postpronotal setae arranged nearly in a straight line; 1 posthumeral seta. Scutellum with dense gray pruinosity, laterally setulose; 1 prebasal seta, subapical seta absent, and 1 lateral seta. Prosternum setulose; proepisternum bare; 3 anterior anepisternal setae; 3 katepisternal setae; anepimeron and katepimeron setulose; meron bare, katatergite with villi. Anterior and posterior spiracles brownish black, posterior spiracles embed a few prostrate black setae.

Wing ( Figs 1–2 View FIGURES 1–2 ) pale brown without dark clouds; membrane covered with microchaeta; tegula and basicosta dark brown. Vein subcosta bow-shaped, R 1 bare; R 4+5 with 6–7 setulae dorsally and 2 ventrally; vein M bent forward towards R 4+5, crossvein dm-cu nearly straight; lower calypter whitish with paler border and fringe, and 1/3 of the outer part opaque white; lower calypter enlarged posteriorly; halter dark, but apex yellowish. Suprasquamal ridge bare.

Legs dark ( Fig. 2 View FIGURES 1–2 ). Fore femur with complete row of posteroventral setae, without anteroventral seta row; fore tibia without anterodorsal, posterodorsal, anteroventral and posterior setae, with 3–5 posteroventral setae on apical half and 3 of them longer. Mid femur with 2–3 rows of setulae on anteroventral surface, a row of posteroventral setae, 4–5 preapical posterior setae (the upper 2–3 setae shorter), without a preapical dorsal protuberance bearing a set of setulae; mid tibia with 4–5 posteroventral setae, posterior seta absent. Hind femur with 5 anteroventral setae on apical half, the 3 apical ones longer, posteroventral seta absent, with anterodorsal seta row (about 13 setae), 2 preapical dorsal setae; hind tibia with a row of 7 anteroventral setae from supramedial to preapical and seta length about equal to 1/4 of hind tibia length; 2 anterodorsal setae; 1 posterodorsal seta; 5–6 posteroventral setae on apical half and slightly longer than tibial width. Hind tarsi with erect yellow brush-like hairs vetrally in entire length, the length of basal hairs equal to tarsal width.

Abdomen. Round-shaped in dorsal view, black in ground-colour, covered with grayish-white pruinosity; tergites with distinct black vitta in the middle, about equal to the base of hind tibia width. 1st sternite setulose.

Terminalia ( Figs 5–8 View FIGURES 3–8 ). Sternite 5 nearly rectangular, its lateral lobe short and pointed apically. Cerci with 4 pairs of processes in lower margin, the inner lobe subulate, apical part sclerotized, the outer lobe semilunar; cerci internal surface without spines. Surstylus short in profile, with some setae on basal half. Epiphallus short; distiphallus membranous, folding fan shape; pregonite robust and tapering to the apex, with 2 long and strong setae on basal half; postgonite slender and bare.

Female. Unknown.

Type material. Holotype ♂, CHINA, Huangdaigou, 41.83°N, 124.92°E, elev. 600–800 m, Qingyuan County, Fushun , Liaoning, 26–31.Ⅴ.2015, Henan Li ( SYNU) GoogleMaps . Paratype. 1 ♂, same as holotype.

Etymology. The specific name is derived from the diagnostic character, Latin adjective quadrangula , referring to cerci with four pairs of processes on lower margin.

Distribution. China ( Liaoning).

Remarks. The new species is similar to Z. asetosa (Baranov) , but it differs from the latter as follows: frons narrower, about 0.8 times as wide as postpedicel; 1+2 acrostichal setae; 3+4 dorsocentral setae (0+2 acrostichal setae, 4+5 dorsocentral setae in Z. asetosa ); and hind tibia with 2 anterodorsal setae and 1 posterodorsal seta (a row of 6–7 short anterodorsal setae and 3 posterodorsal setae in Z. asetosa ) (characters of Z. asetosa from Fan 2008).