Coronatella (Coronatella) rectangula (Sars, 1862)

Dadykin, Ivan A., Karimov, Gafur N., Sinev, Artem Y., Volkova, Polina A. & Kotov, Alexey A., 2024, Branchiopoda (Crustacea: Anostraca and Diplostraca) diversity in Tajik Pamir and plain West and South Tajikistan, Zootaxa 5497 (1), pp. 1-32 : 22-24

publication ID	https://doi.org/10.11646/zootaxa.5497.1.1
publication LSID	lsid:zoobank.org:pub:87B27D58-7812-44D7-92AF-B72A4A6E040B
DOI	https://doi.org/10.5281/zenodo.13644842
persistent identifier	https://treatment.plazi.org/id/03F14366-F051-FFB6-FF45-D1C6FBC2FD13
treatment provided by	Plazi (2024-08-30 13:39:47, last updated 2024-11-27 01:38:08)
scientific name	Coronatella (Coronatella) rectangula (Sars, 1862)
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Coronatella (Coronatella) rectangula (Sars, 1862) View in CoL

( Fig. 6H–M View FIGURE 6 )

Diagnosis. Parthenogenetic female. Body length 0.32–0.38 mm, body ovoid in lateral view ( Fig. 6H View FIGURE 6 ). Carapace ornamented with obscure longitudinal lines. Postabdomen short, slightly narrowing towards its distal end, preanal angle acute ( Fig. 6J View FIGURE 6 ). Postanal margin with 4–5 large solitary spines and 2–3 groups of spinulae ( Fig. 6J, K View FIGURE 6 ); 6–7 groups of long lateral setulae on lateral surface of the postanal portion ( Fig. 6J View FIGURE 6 ). 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 View FIGURE 6 ).

Male. Body length 0.36 m, body more elongate than that of female ( Fig. 6L View FIGURE 6 ). Postabdomen short, strongly narrowing towards its distal end, with prominent preanal angle ( Fig. 6M View FIGURE 6 ). 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 View FIGURE 6 ). 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 View FIGURE 6 ).

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).

References

Gurvich, V. F. (1974) Biogeographical analysis the Rotifera, Cladocera and Copepoda fauna of high-altitude water bodies of the Pamirs and Tien Shan. Gidrobiological Zhournal, 10, 25 - 31.

Khaitov, A. (1978) Zooplankton of reservoirs and fish ponds of South Tajikistan. Tajik SSR Academy of Sciences, Dushanbe, 144 pp.

Khaitov, A. (2011) Formation of zooplankton fauna of South Tajikistan (fauna, biology, ecology, productivity, biogeography). Shotemura Tajik Agricultural Institute, Dushanbe, 271 pp.

Khaitov, A. (2013) Species diversity of plankton of Nurek Reservoir. Vestnik Pedagogicheskogo universiteta, 5, 187 - 191.

Korovchinsky, N. M. & Kotov, A. A. (Eds.) (2021) Water fleas (Crustacea: Cladocera) of North Eurasia. Vol. 2. KMK Press, Moscow, 544 pp.

Mukhamediev, A. M. (1986) Crustaceans of water bodies of Fergana Valley. FAN, Tashkent, 160 pp.

Sinelnikova, A. A. (1963) Ejection of zooplankton through constructions of Kairak-Kum hydrostation. Trudy Instituta Zoologii i Parazitologii AN Tadzhikskoy SSR, 26, 87 - 94.

Sinev, A. Y., Lee, W. & Kotov, A. A. (2022) A new species of Coronatella Dybowski & Grochowski, 1984 (Cladocera: Chydoridae) endemic to Jeju Island (Republic of Korea). Zootaxa, 5159 (4), 571 - 582. https: // doi. org / 10.11646 / zootaxa. 5159.4.6

Van Damme, K. & Dumont, H. (2008) Further division of Alona Baird, 1843: separation and position of Coronatella Dybowski & Grochowski and Ovalona gen. n. (Crustacea: Cladocera). Zootaxa, 1960 (1), 1 - 44. https: // doi. org / 10.11646 / zootaxa. 1960.1.1

Van Damme, K., Sinev, A. Y. & Dumont, H. J. (2011) Separation of Anthalona gen. n. from Alona Baird, 1843 (Branchiopoda: Cladocera: Anomopoda): morphology and evolution of scraping stenothermic alonines. Zootaxa, 2875 (1), 1 - 64. https: // doi. org / 10.11646 / zootaxa. 2875.1.1

Werestschagin, G. Y. (1923) Notes on freshwater fauna of Pamir. Izvestiya Rossiyskogo Gidrologicheskogo Instituta, 6, 21 - 40.

Figures

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, Coronatellarectangula (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.