Chinese

Xie, Qi, Ruan, Yongying, Qiu, Lu, Zhang, Mengna, Peng, Yingying, Ma, Liya & Liu, Yang, 2025, A new species of genus Blaiseus Fleutiaux, 1931 from Guangdong, China (Coleoptera: Elateridae: Cardiophorinae), Zootaxa 5660 (3), pp. 403-412 : 406-409

Chinese common name: ỄDZḆ叶叩ę

( Figs. 1–5)

Type material. Holotype: ♂ ( SZPU), Dinghu Mountain ( ỄDZƜ), Zhaoqing , Guangdong Prov., 30 m, 16– 25.VII.2023, leg. Yong-Ying Ruan, 23.173°N, 112.542°E.

Paratypes: 12 ♂ in total. 1 ♂, Dinghu Mountain, Zhaoqing , Guangdong Prov., 18.VI.1983, leg. Pei-Yu Yu ( IZCAS) ; 1 ♂, Qingyun Temple, Dinghu Mountain, Zhaoqing , Guangdong Prov., 200 m, 18.VII.2024, leg. MeiYing Lin, 27.172°N, 112.540°E ( IZGAS) ; 1 ♂, Dinghu Mountain Nature Reserve, Zhaoqing , Guangdong Prov., 9.VI–24.VII.2021, 23.170°N, 112.540°E ( MYNU) ; 1 ♂, Dinghu Mountain, Zhaoqing , Guangdong Prov., 63 m, 12.V.2020, 23.160°N, 112.550°E ( SZPU) ; 1 ♂, Dinghu Mountain Nature Reserve, Zhaoqing , Guangdong Prov., 25.V–9.VI.2021, 23.170°N, 112.549°E ( SZPU) ; 1 ♂, Dinghu Mountain Nature Reserve, Zhaoqing , Guangdong Prov., 9.VI–24.VII.2021, 23.170°N, 112.540°E ( SZPU) ; 1 ♂, Dinghu Mountain Nature Reserve, Zhaoqing , Guangdong Prov., 16.V–16.VI.2022, 23.158°N, 112.548°E ( SZPU) ; 2 ♂, Qingyun Temple, Dinghu Mountain, Zhaoqing , Guangdong Prov., 200 m, 18.VII.2024, leg. Mei-Ying Lin, 27.172°N, 112.540°E ( SZPU,) ; 1 ♂, Dongwan Village of Neilingding Island, Shenzhen , Guangdong Prov., 38 m, 3.V.2018, leg. Xiao-Qin Chen, 22.420°N, 113.797°E ( SZPU) ; 1 ♂, Lutian Conservation Area, Foshan , Guangdong Prov., 9–24.VI.2021, 22.758°N, 112.398°E ( SZPU) ; 1 ♂, Tianluhu Lake, Huangpu District, Guangzhou City , Guangdong Prov., 11.V.2019, leg. Bao-Xiang Zhan ( MYNU) .

Type locality. Dinghu Mountain, Guangdong Province, China.

Diagnosis. B. dinghuensis is distinguished by its pronotum shape (with sides evenly convex and slightly constricted near the base) and the coloration (with a longitudinal yellow strip on the elytron,). This new species is close to B. bedeli in coloration but can be differentiated by the hind wing with CuA1 vein not forming closed cell with other veins ( Fig. 5A), genitalia with wider median lobe apex with median lobe width to paramere width ratio 2.93 (n=1), and the sides of the pronotum only weakly constricted before the posterior angle (width at middle of pronotum to that at constriction ratio: 1.08–1.1, n=3). While in B. bedeli ( Douglas 2009) , hind wings with CuA1 forked at the junction with MP3+4, forming an additional closed cell, the ratio of genitalia median lobe width to paramere width 2.45 (n=1), and the sides of the pronotum apparently constricted before the posterior angle (width at the middle of pronotum to that at constriction ratio: 1.22, n=1).

Description. Male. Body elongate-oval ( Fig. 2A–C), constricted near posterior angles of pronotum and base of elytra. Body color varied from yellow to light chestnut brown. Color of elytron varied: yellow with a longitudinal light-yellow strip, yellowish-brown with a yellow strip, or brown with a yellow strip. Body covered with short yellow pubescence.

Body length ( Figs. 2A–C, 5B–D): 6.45–7.01 mm (measured frontal carinae to elytral apex); width 2.17–2.44 mm (measured across widest part of body); pronotum length 1.82–1.96 mm, width 1.92–2.08 mm (measured at middle of pronotum, i.e., widest part of pronotum), width to length ratio: 1.03–1.08; elytra length 4.34–4.84 mm. (n=4).

Head densely pubescent ( Fig. 3A); frons and vertex abundantly covered with deep punctures even near frontal carina; diameter of frontal punctures 0.5–1 times the distance between them. Frontal groove narrow, only present at middle near frontal carina and base of antennomere; nasale area (i.e., frontoclypeal region) with a pair of circular pits anteromesad of antennal fossae ( Fig. 4I). Interval between compound eyes approximately 3.12 times the transverse diameter of one eye (n=1). In most individuals, antennae stretching beyond basal 1/3 of elytra and not exceeding middle of elytra; in one individual, antennae stretching beyond middle of elytra; antennomere I and III each about 2.0 times the length of antennomere II, antennomere III to Ⅹ triangular, apical antennomere elongateovoid. Mandibles unidentate, well-developed.

Pronotum ( Fig. 3D) widest at middle, lateral sides of pronotum evenly convex, narrowing from middle to base, slightly constricted before posterior angles. Shape of pronotum slightly varied in different individuals. Posterior angles almost straight, oriented backward; with yellow-grey pubescence. Pronotal punctures dense and deep with diameter 0.5–1 times the distance between them; sparser and smaller near posterior angles. Pronotum without basal furrow or incision. Scutellar shield heart-shaped with yellow pubescence, anterior edge slightly concave, posterior apex pointed; surface punctures sparse and uneven in size.

Elytra ovoid, slightly wider than posterior angles, sides approximately parallel, and minute serrations present at basal 2/3 of elytral edge ( Fig. 3E). Interstriae strongly elevated and covered with extremely small and disordered punctures. Hind wings not forming closed cell ( Fig. 5A).

Legs strong ( Fig. 4A–C); femora and tibiae enlarged; protibia strongly produced and toothed at apex; each tibia with two tibial spurs ( Fig. 4A). Hind coxal plates wide from mesal to middle part, abruptly narrowed from middle part to lateral end.

Male genitalia ( Figs. 2D–F, 5E–F): median lobe strongly expands and produced beyond apex of paramere; apex of median lobe notably wider than paramere. Paramere split into an ovoid lateral part (also as: dorsal apex) and a spine-shaped mesal part (also as: ventral apex). Lateral part of paramere a hook-shaped callus and sparse setae near apex ( Fig. 2F, indicated by arrow and small inset). Width of median lobe at apex to width of lateral part of paramere: 2.93–3.0 (n=3).

Female. Unknown.

Variability. The antennae do not reach the middle of the elytra in the holotype ( Fig. 2A–C), whereas in one paratype, they extend beyond the middle of the elytra ( Fig. 5B). The body color of the holotype is yellow, while paratypes exhibit yellow-brown or dark-brown coloration ( Fig. 1F; Fig. 5B–D). However, the elytral strip is always present ( Fig. 4F). The lateral sides of the pronotum are usually evenly convex, although there is slight variation between individuals. The shape of the scutellar shield also shows minor differences ( Fig. 4D–G).

Distribution. China (Guangdong Province).

Etymology. This species is named after the type locality.