Pyrocoelia cenwanglaoensis Zhu & Zhen, 2022

Zhu, Chengqi, Xu, Xiaodong & Zhen, Ying, 2022, Two new species of Pyrocoelia Gorham (Coleoptera: Lampyridae) from Southwest China, Zootaxa 5162 (2), pp. 173-182 : 174-177

Pyrocoelia cenwanglaoensis Zhu & Zhen , sp. nov.

( Figs. 1 , 3 , 5, 6 )

Description. Male ( Figs. 1 , 3 ): BL 18.6–20.8 mm; BW 9.2–11.0 mm; EL/EW 1.48–1.56; EL/PL=3.16–3.48 (six individuals).

Head. Antenna serrate, black, almost 1/3 as long as body length; first antennomere cone-shaped; second short and cylindrical; third to tenth compressed, with inconspicuous branches originating from inner side; eleventh almost 1.5 times as long as the tenth antennomere, slightly dilated from base to apex; antennal sockets broadly separated from each other. Eyes moderately separated above the labrum, weakly oviform laterally. Clypeus and labrum fused together and elongate oval. Mandibles shorter than clypeus and labrum.

Thorax. Pronotum orange in yellowish, with two crescent transparent cavities; pronotum semi-elliptical; margins of apical and lateral slightly elevated; longitudinal carina distinct. Scutellum ligulate and covered with orange hairs. Legs long and thick, black. Elytra elongated, in blackish, subparallel and broadest in apical 2/3.

Abdomen. Black or dark brown, abdominal terga shorter than elytra; abdomen black, gradually smaller from basal to apical segments; terga wide, with lobate expansion on both sides, apical blunt. Light organ in bright yellow ( Fig. 3 ), occupying almost all fifth and sixth ventrites; seventh ventrite emarginate. Abdominal spiracles on lateral edges of each abdominal segment.

Male genitalia. ( Figs. 5–6 ) Aedeagal sheath ( Fig. 6a–b ) about 2.5 mm long. tergite of the sheath (TS) subtrapezoidal, with base broadly rounded. Aedeagus ( Fig. 5a–c ) about 2.1 mm long, trilobate. Phallus slender, broadest at base, becoming narrower in apical 1/3, then elliptically expanding, dilated weakly at apex, little longer than parameres. Parameres robust in basal 1/3, subparallel-sided, symmetric, apical arm thumb-like, about 1/3 length of parameres.

Diagnosis. Body elongated, depressed dorsally, antenna serrate, second antennomere short and cylindrical, elytra subparallel. Pyrocoelia cenwanglaoensis sp. nov. is morphologically similar to P. pectoralis Olivier, 1883 from Hubei in central China but can be distinguished by the following characters: body size of P. cenwanglaoensis (BL= 18–20 mm) is larger than P. pectoralis (BL= 14 mm); pronotum of P. cenwanglaoensis is orange in yellowish while pronotum of P. pectoralis is orange. As for male genitalia, phallus of P. cenwanglaoensis is slender than P. pectoralis , and the parameres is much straighter.

P. cenwanglaoensis is also similar to P. amplissima Olivier, 1886 , but the color of the metasternum and ventral abdomen in P. amplissima is orange while in P. cenwanglaoensis is orange in yellowish and black; phallus of P. amplissima is thicker than P. cenwanglaoensis .

Etymology. The specific name cenwanglaoensis (Chinese name: ẒƗŦ山ḛff) refers to the type locality of this new species.

Holotype: CHINA: 1♂, labeled: ‘ China: Guangxi, Baise County, Mt. Cenwanglaoshan , 24°29'42″N, 106°24'28″E, H: 1300 m, 10. XI. 2019, Local People leg. ’;‘ HOLOTYPE (red), ♂, Pyrocoelia cenwanglaoensis sp. n., det. Zhu, Zhen, 2020’ (Westlake University).

Paratype: CHINA: 2♂♂, labeled: ‘ China: Guangxi, Baise County, Mt. Cenwanglaoshan , 24°29'42″N, 106°24'28″E, H: 1300 m, 10. XI. 2019, Local People leg. ’; ‘ PARATYPE (yellow), 2♂♂, Pyrocoelia cenwanglaoensis sp. n., det. Zhu, Zhen, 2020’ (Westlake University).

Distribution. China: Guangxi Province.

Figures

FIGURE 1–2. 1) Habitus of male holotype of Pyrocoelia cenwanglaoensis Zhu & Zhen, sp. nov (a. dorsal view; b. ventral view). Scale bar = 10 mm. 2) Habitus of male holotype of Pyrocoelia rubrothorax Zhu & Zhen, sp. nov (a. dorsal view; b. ventral view). Scale bar = 10 mm.

FIGURE 3–4. 3) Male abdomen and light organs on each of ventrites 5–6 of Pyrocoelia cenwanglaoensis. Scale bar = 1 mm; 4) Male abdomen and light organ only on ventrite 6 of Pyrocoelia rubrothorax. Scale bar = 1 mm.

FIGURE 5–6. 5) Aedeagus of Pyrocoelia cenwanglaoensis (a. dorsal view; b. ventral view; c. lateral view). Scale bar = 1 mm; 6) Aedeagal sheath of Pyrocoelia cenwanglaoensis (a. dorsal view; b. ventral view). Scale bar = 1 mm.