Broscosoma guoliangi Jiang, Liu & Wang 2021, sp. nov.
Creators: name: Jiang, Ri-Xin
name: Liu, Xiao-Fan
name: Wang, Shuo
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Broscosoma
Broscosoma guoliangi

description: Broscosoma guoliangi Jiang, Liu & Wang, sp. nov. Ṟ亮ừ步m
Figs. 1–2
Type material (24 specimens, 17 ♂♂, 7 ♀♀). Holotype: CHINA: ♂, labelled ‘ China: Fujian Province (AE建省), Sanming City (三DZ市), Luobading (ƤẘLj), elevation 1400-1500 m, 2020.05.18, Guo Liang leg.’ (SCAU). Paratype: CHINA: (16 ♂♂, 7 ♀♀), same label data as the holotype (1 ♂, 1 ♀, MYNU; 1 ♂, 1 ♀, NMPC; 14 ♂♂, 5 ♀♀, SCAU).
Diagnosis. Body shiny, dark brown or black, legs, labrum, palpi and antennae brown. Frontal grooves irregular and impunctate, labrum with six setigerous punctures, clypeus with two setigerous punctures. Pronotum globose, with a pair of setigerous punctures. Elytra with eight distinct striae, shoulders largely rounded, each elytron with two setigerous punctures at base, two setigerous punctures near apex.
Description. Male. Body (Fig. 1A) dark brown or black, slender and obviously convex, dorsal surface very shiny.
Head (Fig. 2A) wider than long, convex, dorsal surface shiny, lacking punctures, frontal grooves irregular and impunctate. Labrum nearly rectangular, with six setigerous punctures and emarginate at apical margin. Apical margin of clypeus slightly emarginate with two setigerous punctures. Eyes large, supraorbital setae level with rear margin of eyes. Antenna longer than the combination of head and pronotum. Antennomeres I–IV glabrous, V–XI densely pubescent.
Pronotum (Fig. 2A), globose, distinctly convex, slightly longer than wide, widest slightly anterior of middle, equally constricted at anterior and basal margins, dorsal surface shiny without punctures. Median longitudinal impression and anterior impression shallow but distinct. One pair of setigerous punctures located at anterior middle of lateral margin of pronotum.
Elytra (Fig. 2B) longer than wide, strongly convex, dorsal surface shiny, each elytron with eight distinct striae. Scutellum nearly triangular, small. Shoulders largely rounded, narrow. Each elytron with four setigerous punctures, two pairs located at base and two pairs located near apex. The inner setigerous punctures of basal elytra located near base of stria II, outer punctures located at shoulders; the inner apical setigerous punctures located near apex of stria II, and the outer puncture located at apex of stria VII.
Legs simple, glabrous, only tibial apex with few thin setae, protarsomeres slightly dilated.
Median lobe of aedeagus (Fig. 2C) simple, ending in a rounded tip; right paramere (Fig. 2D) arcuate, acutely angular at apex, with dense long setae along apical margin; left paramere (Fig. 2E) expanded at middle and tapered to narrow at apex, apical rounded and without setae.
Measurements (mm). BL 7.21–7.25; HL 1.13–1.20, HW 1.45–1.50; PL 2.13–2.25, PW 1.88–2.00; EL 3.80– 3.95, EW 2.70–2.80.
Female (Fig. 1B) similar to male, usually larger, with ovipositor smooth and arched, protarsomeres not dilated basally, basal segment of ovipositor (Fig. 2F) with nine short setae and apical segment with two thinner and longer setae.
Measurements (mm). BL 7.48–8.03; HL 1.10–1.33, HW 1.48–1.53; PL 2.38–2.45, PW 2.00–2.23; EL 4.00– 4.25, EW 2.95–3.10.
Distribution. China: Fujian Province.
Biological notes. Both females andmales were collected on the lower surface of a damp cliff at night (Figs. 7B, D–E).
Etymology. This species is named in honor of Mr. Liang Guo (Fujian, China), who collected the new species and donated it to us for study.
Remarks. The new species resembles Broscosoma zhengyuandongi Jiang, Feng & Wang, 2020, and Broscosoma xuhaoi Jiang, Feng & Wang, 2020 in their habitus. However, it can be readily distinguished from B. zhengyuandongi by the following characters: 1) striae on the elytra shallow (cf. deeper); 2) apical part of the left male paramere wide (cf. narrow); 3) the right male paramere covered with setae from middle to apex (cf. apical third); 4) basal segment of the female ovipositor with nine short setae (cf. seven). It can be easily distinguished from B. xuhaoi by the apical margin of clypeus with two setigerous punctures (cf. four), and the left male paramere lacking setae (cf. with setae).
description: Published as part of Jiang, Ri-Xin, Liu, Xiao-Fan & Wang, Shuo, 2021, New species and new distributional record of the genus Broscosoma Rosenhauer 1846 (Coleoptera, Carabidae, Broscinae) from China, pp. 137-146 in Zootaxa 4951 (1) on pages 138-139, DOI: 10.11646/zootaxa.4951.1.6, http://zenodo.org/record/4655824