Zaitzevia cf. chenzhitengi Jiang & Wang, 2020

Bian, Dong-Ju & Jäch, Manfred A., 2025, The species of the genus Zaitzevia Champion, 1923 (Coleoptera, Elmidae) from Shaanxi Province, China, ZooKeys 1264, pp. 129-157 : 129-157

Zaitzevia cf. chenzhitengi Jiang & Wang, 2020

Figs 4 A, B , 10 D – F

Zaitzevia chenzhitengi Jiang and Wang 2020: 232; Bian and Zhang 2022: 265; Jiang and Chen 2023: 204 (key).

Material examined.

China, Shaanxi • 1 ♂ ( IAECAS): “ China: Shaanxi, \ Qinling Northwest \ A & F University forestry center | Huoditang \ 1974 m, 2005.6. 12, Leg. Wang M. ” ; Sichuan • 2 ♂♂, 2 ♀♀ ( NMW): “ China: Sichuan \ Emeishan \ 160 km SSW Chengdu \ 1530 m (4 a) [ CWBS 52 ] \ 22. 6. 1994 \ leg. Schillhammer ” ; Yunnan • 1 ♂ ( IAECAS): “ China: Yunnan (20) \ Nujiang, \ Lushui, Pianma | 26°0'3"N, 98°39'42"E \ 2392 m, 2018.10. 25. \ Leg Peng, Zhu, Dong ”; 3 ♂♂, 3 ♀♀ ( IAECAS) : “ CHINA: Yunnan (25) \ Nujiang, Lushui \ Pianma | 26°0'26"N, 98°38'54"E \ 2172 m, 2019.7. 6 \ Leg. Peng, Zhu, Dong ” • 2 ♂♂, 4 ♀♀ ( NMW): “ China NW-Yunnan \ 15 km N Lijiang \ 2800 m, 6. 7. 1994 \ leg. JI (16) [ CWBS 60 ] ” .

Taxonomy.

Zaitzevia chenzhitengi was described by Jiang and Wang (2020) based on one male and one female from northern Sichuan. Two years later, Bian and Zhang (2022) newly recorded this species from Shaanxi and Yunnan and published photographs of the male habitus and the aedeagus of a specimen from Shaanxi. However, after having examined additional material, which we compared with the original description, we want to express our doubts about the identity of the specimens listed above. Although not explicitly mentioned in the written description by Jiang and Wang (2020), the elytral apices of the holotype are distinctly produced and conjointly acuminate in the figures (see Jiang and Wang 2020: figs 1 A, 2 F), while none of the nine males from the three provinces examined by us has distinctly acuminate elytral apices (see Fig. 4 A ). Furthermore, the body form of the holotype of Z. chenzhitengi is clearly more slender and parallel-sided, and the anterior angles of the pronotum seem to be less acute. Despite the external differences, the aedeagi are remarkably similar, but the endophallic teeth appear to be smaller and situated further proximally in the holotype of Z. chenzhitengi . More material from the type area of Z. chenzhitengi and / or DNA sequencing will be necessary to clarify the identity of “ Z. cf. chenzhitengi ”.

Distribution.

Shaanxi, Sichuan, Yunnan.

Figures

Figure 4. Habitus. A, B. Zaitzevia cf. chenzhitengi Jiang & Wang, 2020, male from Shaanxi. A. Dorsal view; B. Ventral view.

Figure 10. Aedeagus. A – C. Zaitzevia robusta sp. nov., holotype, male; D – F. Z. cf. chenzhitengi, specimen from Shaanxi; A, D. Ventral view; B, E. Dorsal view; C, F. Lateral view.