Sinobathyscia Wang & Perreau & Růžička & Song 2017
Creators: name: Wang, Cheng-Bin
name: Perreau, Michel
name: Růžička, Jan
name: Song, Xiao-Bin
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Sinobathyscia
Sinobathyscia kurbatovi

description: Genus Sinobathyscia Perreau, 1999 (ĢḆṁṂfflffi)
Perreau, 1999: 404 (SpecieS included: kurbatovi); Perreau, 2000: 170 (world catalogue; 1 SpecieS); Perreau, 2015: 210 (Palaearctic catalogue; 1 SpecieS).
Type species: Sinobathyscia kurbatovi Perreau, 1999, Fixed by original deSignation.
Redescription. Small size, less than 1.5 mm. Body (Figs. 1 A–E) Bathyscia- like, oval and rather convex. Dorsum consistently clothed with homogeneous fine, prostrate pubescence.
Head wider than long; clypeofrontal suture (Fig. 2 D) distinct. Anophthalmic, compound eyes (Fig. 2 E) completely absent. Occipital carina vestigial. Labrum (Fig. 2 H) transverse, rounded subrectangle; epipharyngeal area with torma. Left and right mandibles (Figs. 2 F–G) asymmetrical, each with a tooth on inner margin of subapex; subapical orthogonal penicillus made up of slender, fine setae; mola well-developed. Maxillary palp (Figs. 2 I–J) with penultimate palpomere slightly swollen, length/width = 1.7; ultimate palpomere quite slender, nearly as long as and about half as wide as penultimate palpomere. Labium as shown in Fig. 2 K, premier labial palpomere only a little longer than ultimate palpomere, and ultimate palpomere nearly twice as long as penultimate palpomere. Antennae (Figs. 2 A–C) with basal two antennomeres much strong and nearly as long as each other. Cervical sclerite (Fig. 2 L) tooth-like, tapering posteriorly, apex subacute, length/width = 2.9.
Pronotum (Figs. 3 A–C) widest at base, punctate and microreticulate but not transversely striolated (Fig. 3 K). Elytra not fused with each other, with fine transverse striolations (Fig. 3 L). Sutural striae absent. Epipleura commonly narrow. Metathoracic wings absent.
Scutellum much wide, tightly integrated with metanotum. Metanotum (Fig. 3 I) short but with moderately and narrowly elongated metatergal apophysis, reaching about the basal third of elytra. Metendosternite (Fig. 3 J) with stalk short, (stalk length)/(furcal arm width) = 0.3.
Meso- and metaventrite as shown in Figs. 3 D–E, and shapes of mesepisternum, mesepimeron, metaepisternum and metepimeron can be fully seen in Fig. 3 E; mesepimera wider than long, outer margin longer than inner margin. Mesoventral carina (Fig. 3 E) strongly developed, lamellate, high, somewhat thickened, and shortly extended under metaventrite. Metacoxal cavities distinctly separated.
Abdominal tergites (Fig. 4 G) only the last two sclerotized, the others membranous.
Protarsi pentamerous and expanded in male (Fig. 4 B), tetramerous and linear in female (Figs. 4 D, F). Protibiae with several small outer spines but not forming into a row (Figs. 4 A, C, E). Meso- and metatibiae without spine combs around apex. Outer spurs well-developed. Mesotarsi simply linear.
Male genital segment (Fig. 4 I) with spiculum gastrale poorly sclerotized, ill-defined. Aedeagus (Fig. 5 A) slender; parameres thick, reaching the apex level of median lobe; basal lama short; endophallus with two obvious bands of phanerae.
Spermatheca (Figs. 6 B, E) large, trilobed, the middle one the largest, and the two apical ones separated by a narrow unsclerotized region. Ovipositor with minute stylus.
Distribution. China (as in Fig. 8).
Diagnosis. Sinobathyscia well resembles Coreobathyscia from South Korea, but the latter is larger than 2.0 mm in body length, antennae with basal two antennomeres distinctly more slender, parameres much exceeding the apex level of median lobe, endophallus without sclerites.
description: Published as part of Wang, Cheng-Bin, Perreau, Michel, Růžička, Jan & Song, Xiao-Bin, 2017, Revision of the genus Sinobathyscia Perreau (Coleoptera, Leiodidae, Cholevinae) from China, with description of a new species, pp. 350-360 in Zootaxa 4303 (3) on pages 351-353, DOI: 10.11646/zootaxa.4303.3.2, http://zenodo.org/record/841405