Copelatus parallelus Zimmermann, 1920

Jiang, Zhuo-Yin, Zhao, Shuang, Yang, Zhen-Yu, Jia, Feng-Long & Hájek, Jiří, 2022, A review of Copelatus Erichson, 1832 of Mainland China, with description of ten new species from the japonicus complex (Coleoptera: Dytiscidae: Copelatinae), Zootaxa 5124 (3), pp. 251-295 : 266

Copelatus parallelus Zimmermann, 1920

( Figs 16 , 51–52 )

Copelatus parallelus Zimmermann, 1920: 226 .

Type locality. “Setsu, Zentral-Japan” [ Japan, Honshu, Osaka Prefecture, Settsu , ca. 34°46′N 135°33′] .

Type material. Holotype ♂, originally deposited in Zoologisches Museum , Centrum für Naturkunde, Universität Hamburg, Hamburg, Germany; destroyed during WW2.

Material examined. CHINA: Hebei: 1 ♀, Baiyangdian, Mapu vill., 16.vii.-11.viii.2012, J. Wang & P. Wei leg. Hubei: 1 ♀, Wuchang , 17.v.1961, Z. Pu leg. Hunan: 1 ♂, Huaihua, Yushuwan , 17.vi.1965, Z. Chen leg. Shanghai: 1 ♀, 20.iv.1950 (all SYSU).

Diagnosis. Small species (TL: 3.5–4.0 mm), oblong-oval species, lateral sides of elytra nearly parallel in basal two thirds of their length. Head reddish; pronotum dark brown with reddish anterior margin and lateral sides; elytra brownish black, with broadly orange base and thin lateral orange band broadening posteriorly to lateral subapical spot. Pronotum with several short strioles basally and laterally. Each elytron with five longitudinal discal striae: all striae beginning at base and ending approximately in apical fifth of elytral length ( Fig. 16 ). Median lobe simple, sickle shaped, broad (widest at middle), only slightly narrowing to beak-shaped apex ( Fig. 51 ). Parameres broad, ‘D’-shaped; apex long and slender; apical lobes long, club-shaped ( Fig. 52 ). Female similar to male in habitus.

Distribution. A species described from Japan and recently recorded also from Korea ( Jung et al. 2020). First records from China (Hebei, Hubei, Hunan and Shanghai) ( Fig. 82 ).

Figures

FIGURE 82. Map of distribution of Copelatus in China Mainland.

FIGURES 13–16. Habitus of Copelatus in China. 13. C. nanlingensis sp. nov. (holotype ♂; Dadongshan, Guangdong); 14. C. oblitus (♂; Cotai Ecological Zone, Macao); 15. C. oblitus (♀; Lantau, Hongkong); 16. C. parallelus (♀; Shanghai). Scale bar 1 mm.

FIGURES 51–62. Male genitalia of Copelatus. 51, 53, 55, 57, 59, 61. median lobe in lateral view; 52, 54, 56, 58, 60, 62. paramere. 51–52. C. parallelus (Yushuwan, Hunan); 53. C. puzhelongi sp. nov. (a. holotype, Pu’er, Yunnan; b. Huanglianshan, Yunnan; c. Houaphanh, Laos); 54. C. puzhelongi sp. nov. (holotype, Pu’er, Yunnan); 55–56. C. rimosus (Dali, Yunnan); 57. C. rosulae sp. nov. (a. holotype, Pianma, Yunnan; b. Kongshu, Yunnan); 58. C. rosulae sp. nov. (Kongshu, Yunnan); 59–60. C. sociennus (Hengqin Island, Guangdong); 61–62. C. tenebrosus (Hengqin Island, Guangdong). Scale bar 0.5 mm.