Procirrus yunnanensis L. Huang & Z. Peng, 2025

Huang, Lei, Cao, Guang-Hong & Peng, Zhong, 2025, Two new species and new records of the genus Procirrus Latreille from China (Coleoptera, Staphylinidae, Paederinae), ZooKeys 1250, pp. 189-200 : 189-200

Procirrus yunnanensis L. Huang & Z. Peng sp. nov.

Figs 3 C , 6

Type material.

Holotype. China – Yunnan Prov. • ♂; glued on a card with two labels as follows: “ China: Yunnan Prov., Lingcang City, Yun Co., Manwan Town, Waziba Village , 24°43'48"N, 100°20'01"E, alt. 1243 m, 16.IV.2016, Zi-Chun Xiong leg. ” “ HOLOTYPE: Procirrus yunnanensis sp. nov., Huang & Peng des. 2025 ” [red handwritten label]; ( SNUC) . Paratypes. China – Yunnan Prov. • 1 ♂; glued on a card with two labels as follows: “ China: Yunnan Prov., Xishuangbanna, Botanical Garden of the Chinese Academy of Sciences , 5.VII.2003, Hu & Tang leg. ” “ PARATYPE: Procirrus yunnanensis sp. nov., Huang & Peng des. 2025 ” [yellow handwritten label]; ( SNUC) ; China – Yunnan Prov. • 1 ♀; glued on a card with two labels as follows: “ China: Yunnan Prov., Xishuangbanna, Nabanhe , alt. 700 m, 5.V.2009, Hu & Yin leg. ” “ PARATYPE: Procirrus yunnanensis sp. nov., Huang & Peng des. 2025 ” [yellow handwritten label]; ( SNUC) .

Description.

Measurements (in mm) and ratios: TL: 9.26–10.72; FL: 4.84–4.89; HL: 1.20–1.22; HW: 1.03–1.06; AnL: 2.14–2.17; PL: 1.67–1.75; PW: 0.97–1.00; EL: 1.11; EW: 1.28–1.36; AL: 2.00–2.67; HW / HL: 0.86–0.88; HW / PW: 1.06–1.09; HL / PL: 0.69–0.72; PW / PL: 0.55–0.58; EL / PL: 0.63–0.66.

Habitus as in Fig. 3 C . Coloration: body brown; antennae brown to yellowish brown; legs brown to light brown.

Head nearly orbicular, widest behind eyes; punctation fine and very dense, surface matt. Eyes large, 0.81 times as long as postocular region in dorsal view. Antennae slender, antennomere 1 2.14–2.25 times, 2 1.36–1.45 times, 3 0.95–1.09 times, 11 1.23–1.50 times as long as 4. Neck across nuchal constriction one-third as wide as greatest postocular width of head.

Pronotum distinctly oblong; lateral margins weakly convex in dorsal view; coarser and denser than that of head; midline with short and very narrow rudiment of glossy line posteriorly.

Elytra shorter than pronotum; humeral angles well developed; punctation coarser and sparser than that of pronotum; pubescence denser than that of pronotum. Hind wings well developed. Protarsomeres I – IV strongly dilated.

Abdomen nearly parallel, widest at segment VI, evenly narrowing posteriorly. Abdominal tergites with coarse and dense punctation, and long decumbent pubescence, distinctly denser on apical tergites; interstices without microsculpture.

Male. Abdominal tergite VIII (Fig. 6 C ) oblong, with strongly convex posterior margin. Sternite VIII (Fig. 6 D ) weakly transverse, with moderately deep and weakly asymmetric posterior excision, pubescence not distinctly modified. Aedeagus slender and as in Fig. 6 E – G ; median lobe asymmetric in ventral view; parameres slender starting from base, with about 1–2 apical setae; internal sac with somewhat hook-shaped sclerotized spine basally and large sclerotized spine apically, and with short flagellum curled in basal part of aedeagus.

Female. Abdominal tergite VIII (Fig. 6 A ) distinctly oblong, with strongly convex posterior margin. Posterior margin of abdominal sternite VIII (Fig. 6 B ) broadly convex.

Distribution and natural history.

The specimens were collected in three localities in southwest Yunnan, China. They were sifted from the leaf litter of broad-leaved forests.

Etymology.

The specific epithet is derived from Yunnan Province, where the type locality is situated.

Comparative notes.

Regarding the coloration of the body, the shape of the pronotum, the elytra and the male sternite VIII, as well as features of the punctation and pubescence, P. yunnanensis is similar to light-coloured specimens of morphologically variable P. lewisii . It can be distinguished from it by the larger body size, the slightly longer neck, the slender aedeagus with two sclerotized spines and a short flagellum curled in the basal part of the internal sac ( P. lewisii : internal sac with three sclerotized spines and a long flagellum).

Figures

Figure 3. Habitus. A. Procirrus lewisii (from Xizang); B. Procirrus hei; C. Procirrus yunnanensis. Scale bars: 1.0 mm.

Figure 6. Procirrus yunnanensis. A. Female tergite VIII; B. Female sternite VIII; C. Male tergite VIII; D. Male sternite VIII; E. Aedeagus in ventral view; F. Aedeagus in lateral view; G. Aedeagus in dorsal view. Scale bars: 0.5 mm (A – D); 0.2 mm (E – G).