Ichthyurus senensis Pic, 1926

Ichthyurus senensis Pic, 1926

Figs 1 A, B View Figure 1 , 2 View Figure 2 , 3 A ‒ D View Figure 3 , 8 A View Figure 8

Ichthyurus senensis Pic, 1926: 5.

Type material examined.

Holotype • 1 ♀ ( MNHN), [h] “ yunnan / Chine ”, [h] “ senensis / n. sp. ”, [p] “ HOLOTYPE ”.

Additional material examined.

China, Yunnan • 2 ♂♂ 1 ♀ ( MHBU), Puer, Muchang , 17. VII. 2021, Tong Liu leg. • 1 ♂ ( MHBU), Dali, Jizu Mountains , 25. VI. 2022, Younan Wang leg.

Re-description.

Body length (both sexes): 7.7‒10.2 mm; body width (both sexes): 1.6‒1.7 mm.

Male (Fig. 1 A View Figure 1 ). Colouration. Body black, head yellow before antennal sockets, scape and pedicle yellow ventrally, prosternum yellow, pronotum yellow with a large irregular black marking extending to anterior and posterior margins, scutellum yellow, elytra yellow at humeri and along suture, the yellow stripes paler and wider at basal parts and near apices, legs yellow at basal 1 / 4 parts of profemora, 1 / 2 parts of mesofemora and 3 / 4 parts of metafemora, protibiae yellow at ventro-apical 3 / 4 parts, abdominal segments narrowly yellow at posterior margins.

Eyes large, interocular distance ca. 0.6 times of the diameter of an eye. Antennae reaching to posterior margin of abdominal tergite II, antennomere II ca. 1 / 4 length of I, III ‒ XI subequal in length and ca. 3.0 times longer than II.

Pronotum 1.1 times wider than long, anterior margin arcuate, lateral margins feebly diverging posteriorly, posterior margin bisinuate, anterior angles subrounded, posterior angles nearly rectangular.

Elytra 1.5 times longer than wide, ca. 2.6 times longer than pronotum, with lateral margins nearly straight, sutural margins nearly straight and slightly dehiscent from base, distance between sutural margins feebly wider than apical width of an elytron, apices subrounded.

Profemora (Fig. 2 A View Figure 2 ) slightly swollen in middle, protibiae (Fig. 2 A View Figure 2 ) shallowly excavated on inner apical side, protarsomeres I projecting anteriorly and beneath II (Fig. 2 A View Figure 2 ); mesotrochanters (Fig. 2 B View Figure 2 ) without any tooth, mesofemora (Fig. 2 B View Figure 2 ) slightly swollen, 3.5 times longer than wide, mesotibiae (Fig. 2 B View Figure 2 ) each with a spine-like process at apex; meta-thoracic legs slender and simple (Fig. 1 A, B View Figure 1 ).

Terminal abdominal tergite (Fig. 2 C View Figure 2 ) ca. 1.5 times longer than wide, with postero-lateral projections ca. 2 / 5 length of the tergite, feebly arcuate at inner margins, distinctly arcuate at outer margins. Proctiger (Fig. 2 C View Figure 2 ) peach-shaped and evenly sclerotised, completely surrounded by paraproct; paraproct (Fig. 2 C View Figure 2 ) strongly developed and tubular, feebly shrunk apically, shallowly emarginate in dorso-posterior margin, tergal flange weakly sclerotised, strongly expanded at base and narrowly protruding apically.

Terminal abdominal ventrite (Fig. 2 E View Figure 2 ) trilobed, approximately twice as wide as long, fissured in middle of apical half part, with lateral lobes feebly diverging posteriorly and nearly straight at both inner and outer margins, sinuate at posterior margins, acute at outer apical angles, rectangular at inner apical angles.

Abdominal sternite IX (Fig. 8 A View Figure 8 ) moderately sclerotised and subparallel-sided, ca. 2.4 times longer than wide, with posterior margin obliquely truncate, posterior right angles subrounded and left angles widely triangular, anterior left angle stout beak-shaped and right angle strongly protruding anteriorly, slightly expanded and rounded at apex.

Aedeagus (Fig. 3 A ‒ D View Figure 3 ): right paramere dorso-ventrally flattened, tapered apically, 1.5 times as long as wide; left paramere elongate and conical, nearly straight, approximately twice longer than right paramere, rounded at apex, covered with some short setae on dorsal side (Fig. 3 B View Figure 3 ); setifore extension developed and moderately sclerotised, 1 / 3 length of left paramere (Fig. 3 B, C View Figure 3 ); median lobe 1.5 times longer than parameres, progressively narrowed basally (Fig. 3 A, D View Figure 3 ).

Female (Fig. 1 B View Figure 1 ). Similar to males, but body larger, scape and pedicle uniformly black, eyes less protruding, legs yellow at basal 1 / 4 parts of pro- and meso-femora, metafemora uniformly black, protibiae yellow at ventro-apical 1 / 4 parts, pro- and mesothoracic legs slender and simple; terminal abdominal tergite (Fig. 2 D View Figure 2 ) ca. 1.3 times longer than wide, with postero-lateral projections ca. 1 / 3 length of the tergite; terminal abdominal ventrite (Fig. 2 F View Figure 2 ) nearly as long as wide, widest at apical part, rounded at latero-apical angles, arcuate at lateral margins, feebly emarginate in middle of posterior margin.

Distribution.

China ( Yunnan).