Spring and autumn fauna of Cladocera (Crustacea: Branchiopoda) in the center of East Asia plain: Hunan and Hubei Provinces of China Author Dadykin, Ivan A. Department of Invertebrate Zoology, Biological Faculty, M. V. Lomonosov Moscow State University, Leninskie Gory 1 - 12, Moscow 119991, Russia. Author Sinev, Artem Y. Biological Faculty, Shenzhen MSU-BIT University, No. 1, International University Park Road, Dayun New Town, Longgang District, Shenzhen, Guangdong Province, 518172, China. & Department of Invertebrate Zoology, Biological Faculty, M. V. Lomonosov Moscow State University, Leninskie Gory 1 - 12, Moscow 119991, Russia. Author Gu, Yangliang China Institute of Environmental Sciences, Ministry of Ecology and Environment No. 16 - 18, Ruihe Road, Huangpu District, Guangzhou 510535, China. & Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou 510632, China. Author Han, Bo-Ping Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou 510632, China. text Zootaxa 2023 2023-11-28 5380 1 1 25 https://mapress.com/zt/article/download/zootaxa.5380.1.1/52355 journal article 280018 10.11646/zootaxa.5380.1.1 0778d64c-644d-4bdb-8dde-3ebfd34dc7e9 1175-5326 10212806 D8256C0A-FD09-4EBB-90A0-69542E09C8BD Chydorus cf. biovatus Frey 1985 (fig. 7 J–L). Common in spring and autumn, occurs in waterbodies of any type . Eurybiotic littoral species, sometimes encountered in pelagic zone. The first record for China . Ch. cf. biovatus belongs to the Chydorus sphaericus species complex. Species of the sphaericus -complex in Eurasia have identical morphology of parthenogenetic females, but might be distinguished by male and ephippial female morphology ( Belyaeva & Taylor, 2009 ; Klimovsky & Kotov, 2015 ; Kotov et al. 2016 ). A single male ( Fig. 8 J ) was found in a lake (S6) in spring; the individual had a rounded rostrum ( Fig 8 K ) and a weak preanal angle in the postabdomen ( Fig. 8 L ) typical for the species. Ch. biovatus s. str. is widely distributed in the Nearctic, but populations with a similar morphology have been reported in Yakutia and Kamchatka ( Korovchinsky et al. 2021 ). For description see Klimovsky & Kotov (2015) .