Branchiopoda (Crustacea: Anostraca and Diplostraca) diversity in Tajik Pamir and plain West and South Tajikistan Author Dadykin, Ivan A. A. N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russia. Author Karimov, Gafur N. E. N. Pavlovsky Institute of Zoology and Parasitology of the National Academy of Sciences of Tajikistan 33 Rudaki Ave., Dushanbe 734025, Republic of Tajikistan. Author Sinev, Artem Y. Department of Invertebrate Zoology, Biological Faculty, M. V. Lomonosov Moscow State University, Leninskie Gory 1 - 12, Moscow 119991, Russia. Author Volkova, Polina A. I. D. Papanin Institute for Biology of Inland Waters RAS, Borok, Yaroslavl Region 152742, Russia. Author Kotov, Alexey A. A. N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russia. text Zootaxa 2024 2024-08-22 5497 1 1 32 http://dx.doi.org/10.11646/zootaxa.5497.1.1 journal article 302153 10.11646/zootaxa.5497.1.1 bbd7a0ba-81be-4f19-8da7-911e438b565b 1175-5326 13617864 87B27D58-7812-44D7-92AF-B72A4A6E040B Coronatella ( Coronatella ) rectangula (Sars, 1862) ( Fig. 6H–M ) Diagnosis. Parthenogenetic female. Body length 0.32–0.38 mm , body ovoid in lateral view ( Fig. 6H ). Carapace ornamented with obscure longitudinal lines. Postabdomen short, slightly narrowing towards its distal end, preanal angle acute ( Fig. 6J ). Postanal margin with 4–5 large solitary spines and 2–3 groups of spinulae ( Fig. 6J, K ); 6–7 groups of long lateral setulae on lateral surface of the postanal portion ( Fig. 6J ). Inner distal lobe of thoracic limb I with two setae (2 and 3); seta 2 bears two large spines; seta 3 with a single spine ( Fig. 6I ). FIGURE 6. Some representatives of Anomopoda (Chydoridae) from Tajikistan. A–G, Anthalona harti harti Van Damme et al. , 2011 . A–E, parthenogenetic female from Lake Jirikul (loc. 2) in Tigrovaya Balka National Reserve, Khatlon Region. A, Lateral view. B, labrum. C, distal end of thoracic limb I; D, postabdomen; E, postanal margin of postabdomen. F, G, parthenogenetic female from the same locality with a lineolate carapace. F, general view. G, head pores. H–M, Coronatella rectangula (Sars, 1862) from a small lake near Lake Bulunkul, Tajik Pamir (loc. 24). H–K, parthenogenetic female. H, Lateral view. I, IDL of thoracic limb I. J, postabdomen. K, postanal margin of postabdomen. L–M, male. L, general view. M, postabdomen. Abbreviations: IDL, inner distal lobe of thoracic limb I; ODL, outer distal lobe of thoracic limb I. Male. Body length 0.36 m , body more elongate than that of female ( Fig. 6L ). Postabdomen short, strongly narrowing towards its distal end, with prominent preanal angle ( Fig. 6M ). Postanal angle rounded. Gonopores located at distal end of the postabdomen. Armature of postanal portion conforms to that of female, except of marginal spines with are replaced by groups of setulae ( Fig. 6M ). Postabdominal claw short; basal spine thick, length of basal spine is about 0.32 length of the claw. Distal portion of the claw with a row of spines on its inner side ( Fig. 6M ). Remarks. The species is common in Tajikistan , occurring in different types of water bodies in South Tajikistan and Tajik Pamir (locs. 4, 8, 10, 17, 18, 22, 24, 30, 31). Coronatella rectangula was previously reported for Tajikistan as Alona rectangula Sars, 1862 ( Werestschagin 1923 ; Ozhegova & Sinelnikova 1963 ; Ozhegova et al. 1963; Gurvich 1974 ; Khaitov 1978 ; Mukhamediev 1986 ; Khaitov 2011 , 2013 ). C. rectangula is one of the most common species of Aloninae in temperate regions of Eurasia, but southern borders of its distribution remain unclear ( Korovchinsky & Kotov 2021 ; Sinev et al. 2022 ). The species can be easily confused with its recently described congeners (Sinev 2022; Sinev et al. 2022 ), while populations of C. cf. rectangula from Central Asia have never been studied properly. Morphology of studied males and parthenogenetic females well conforms to the diagnosis of European C. rectangula ( Van Damme & Dumont 2008 ; Sinev 2022).