Abstract
A new cladoceran of the faviformis-group of the genus Chydorus Leach, 1816 (Cladocera: Chydoridae), characterized by a honeycomb-like sculpture of valves and head shield, is described from tundra lakes and ponds in North-East Russia. Morphology of the new species was studied using optical and scanning electron microscopy. Chydorus izvekovae sp. nov. differs from all other species of the faviformis-group in a narrow labral keel with elongated apex, and in a greater number of meshes on the valves and head shield. Other species of the faviformis-group in the Western Hemisphere are distributed in the tropical-subtropical zone, they also inhabit mostly shallow waters with well-developed macrophyte zone.
References
Akatova, N.A. (1949) Zooplankton of the Kolyma River and its basin. Proceedings of LSU, Seria Biologia, 126, 341–367. [in Russian]
Bekker, E.I., Kotov, A.A. & Taylor, D.J. (2012) A revision of the subgenus Eurycercus (Eurycercus) Baird, 1843 emend. nov. (Cladocera: Eurycercidae) in the Holarctic with the description of a new species from Alaska. Zootaxa, 3206 (1), 1–40. https://doi.org/10.11646/zootaxa.3206.1.1
Chengalath, R. (1987) The distribution of chydorid Cladocera in Canada. Hydrobiologia, 145, 151–157. https://doi.org/10.1007/bf02530275
Chertoprud, E.S. & Novichkova, A.A. (2021) Crustaceans in the meiobenthos and plankton of the thermokarst lakes and polygonal ponds in the Lena River delta (Northern Yakutia, Russia): species composition and factors regulating assemblage structures. Water, 13 (14), p.1936. https://doi.org/10.3390/w13141936
Elmoor-Loureiro, L.M.A (2021) Cladoceros do Brazil: familias Eucercidae et Chydoridae. Availuable from: https://cladocera.wordpress.com/ (accessed 24 February 2022)
Frey, D.G. (1980) On the plurality of Chydorus sphaericus (OF Müller) (Cladocera, Chydoridae), and designation of a neotype from Sjaelsø, Denmark. Hydrobiologia, 69 (1), 83–123.
Frey, D.G. (1982a) Honeycombing of the carapace in the chydorid Cladocera: the elusive male of Chydorus faviformis. Journal of Crustacean Biology, 2 (4), 469–476.
Frey, D.G. (1982b) The honeycombed species of Chydorus (Cladocera, Chydoridae): comparison of C. bicornutus and C. bicollaris n. sp. with some preliminary comments on faviformis. Canadian Journal of Zoology, 60, 1892–1916. https://dx.doi.org/10.1139/z82-246
Frey, D.G. (1987) The North American Chydorus faviformis (Cladocera, Chydoridae) and the honeycombed taxa of other continents. Philosophical Transactions of the Royal Society of London B, 315, 353–402. https://dx.doi.org/10.1098/rstb.1987.0012
Garibian, P.G., Neretina, A.N., Klimovsky, A.I. & Kotov, A.A. (2018) A new case of West-East differentiation of the freshwater fauna in Northern Eurasia: the Pleuroxus trigonellus species group (Crustacea: Cladocera: Chydoridae). Zootaxa, 4532, 451–482. https://doi.org/10.11646/zootaxa.4532.4.1.
Garibian, P.G. & Kotov, A.A. (2020) A new species of the Daphnia sinevi group (Crustacea: Cladocera: Daphniidae) from Sakhalin Island, Russian Far East. Zootaxa, 4820 (3), 485–505. https://doi.org/10.11646/zootaxa.4820.3.4
Garibian, P.G., Chertoprud, E.S., Sinev, A.Y.., Korovchinsky, N.M. & Kotov, A.A. (2019) Cladocera and Copepoda (Crustacea: Branchiopoda) of the Lake Bolon and its basin (Far East of Russia). Arthropoda Selecta, 28 (1), 37–63. https://doi.org/10.15298/arthsel. 28.1.05
Gogoi, B., Sousa, F.D.R. & Das, D.N. (2018). Faunal diversity of Cladocera (Crustacea: Branchiopoda) with notes on biogeographically important species in the floodplain wetlands of the Subansiri River basin, India. Annales de Limnologie – International Journal of Limnology, 54, 36. https://doi.org/10.1051/limn/2018022
Jeong, H.G., Sinev, A.Y., Brancelj, A., Chang, K.H. & Kotov, A.A. (2017) A new blind groundwater dwelling genus of the Cladocera (Crustacea: Branchiopoda) from the Korean Peninsula. Zootaxa, 4341 (4), 451–474. https://doi.org/10.11646/zootaxa.4341.4.1
Ji, G.H., Xiang, X.F., Chen, S.Z., Yu, G.L., Kotov, A.A. & Dumont, H.J. (2015) Annotated Checklist of Chinese Cladocera (Crustacea: Branchiopoda). Part II. Order Anomopoda (families Macrotrichidae, Eurycercidae and Chydoridae). Zootaxa, 4044, 241–269. https://dx.doi.org/10.11646/zootaxa.4044.2.4
Klimovsky, A.I. & Kotov, A.A. (2015) Cladocera (Crustacea, Branchiopoda) of Central Yakutia 3. Taxa from the Chydorus sphaericus s. l. species group (Anomopoda, Chydoridae). Zoologicheskiy Zhurnal, 94, 1257–1267. https://doi.org/10.7868/S0044513415110057
Klimovsky, A.I., Bekker, E.I., Sinev, A.Y., Korovchinsky, N.M., Smirnov, N.N. & Kotov, A.A. (2015a) Cladocera (Crustacea, Branchiopoda) of Central Yakutia. 4. Taxonomical-faunistic and zoogeographical analysis. Zoologichesky Zhurnal, 94 (12), 1367–1378.
Klimovsky, А.I., Sinev, A.Y., Bekker, E.I. & Kotov, А.А. (2015b) Cladocera (Сrustacea, Branchiopoda) of Central Yakutia. 2. Some represntatives of the families Bosminidae, Eurycercidae and Chydoridae. Zoologichesky zhurnal, 94 (9), 1009–1022.
Korovchinsky, N.M. (2009) The genus Leptodora Lilljeborg (Crustacea: Branchiopoda: Cladocera) is not monotypic: description of a new species from the Amur River basin (Far East of Russia). Zootaxa, 2120, 39–52. https://dx.doi.org/10.13140/2.1.2184.9283.
Korovchinsky, N.M., Kotov, A.A., Boikova, O.S & Smirnov, N.N. (2021a) Water fleas (Crustacea: Cladocera) of Northern Eurasia. Vol. 1. Moscow, KMK Scientific Press, 482 pp.
Korovchinsky, N. M., Kotov, A. A., Sinev, A.Y., Neretina, A.N. & Garibian, P.G. (2021b) Water fleas (Crustacea: Cladocera) of Northern Eurasia. Vol. 2. Moscow, KMK Scientific Press, 544 pp.
Kotov, A.A. (2006) Adaptations of the Anomopoda (Cladocera) for benthic mode of life. Zoologychesky Zhurnal, 85 (9), 1043–1059.
Kotov, A.A. (2016) Faunistic complexes of the Cladocera (Crustacea, Branchiopoda) of Eastern Siberia and Far East of Russia. Zoologichesky Zhurnal, 95(7), 748–768. https://doi.org/10.1134/S1062359016090041
Kotov, A.A., Ishida, S. & Taylor, D.J. (2006) A new species in the Daphnia curvirostris (Crustacea: Cladocera) complex from the eastern Palearctic with molecular phylogenetic evidence for the independent origin of neckteeth. Journal of Plankton Research, 28, 1067–1979. https://dx.doi.org/10.1093/plankt/fbl041
Kotov, A.A., Garibian, P.G., Bekker, E.I., Taylor, D.J., & Karabanov, D.P. (2021) A new species group from the Daphnia curvirostris species complex (Cladocera: Anomopoda) from the eastern Palaearctic: taxonomy, phylogeny and phylogeography. Zoological Journal of the Linnean Society, 191 (3), 772–822.
Kotov, A.A., Karabanov, D.P., Bekker, E.I., Neterina, T.V. & Taylor, D.J. (2016) Phylogeography of the Chydorus sphaericus group (Cladocera: Chydoridae) in the Northern Palearctic. PLoS ONE, 11 (12), e0168711. https://doi.org/10.1371/journal.pone.0168711
Kotov, A.A. & Sinev A.Y. 2011. Cladocera (Crustacea, Branchiopoda) from the Zeya river basin from the Zeya river basin. 2. Description of new taxa. Zoologychesky zhurnal, 90 (3), 272–284.
Kotov, A.A., Sinev, A.Y., Korovchinsky, N.M., Smirnov, N.N., Bekker, E.I. & Sheveleva, N.G. (2011) Cladocera (Crustacea, Branchiopoda) of the Zeya basin (Amur region, Russia). 1. New taxa for the fauna of Russia. Zoologicheskiĭ Zhurnal, 90 (2), 131–142. [in Russian]
Kotov, A.A., Van Damme, K., Bekker, E.I., Siboualipha, S., Silva-Briano, M., Ortiz, A.A., De la Rosa, R.G. & Sanoamuang, L. (2013) Cladocera (Crustacea: Branchiopoda) of Vientiane province and municipality, Laos. Journal of Limnology, 72 (S2), 81–108. https://doi.org/10.4081/jlimnol.2013.s2.e6
Kurenkov I.I. (2005) Zooplankton of lakes of Kamchatka. Petropavlovsk-Kamchatsky, KamchatRIFO. 178 pp.
Lepskaya, E.V., Bonk, T.V. & Bekker, E.I. (2019) Freshwater microalgae and invertebrates in the basin of Talovskoe Lake (Koryak Reserve, Kamchatka). The research of the aquatic biological resources of Kamchatka and the North-West Part of the Pacific Ocean, 52, 108–119.
Lyubarsky, G.Y. (1996) Archetype, Style, and Rank in Biological Systematics. Moscow, KMK Scientific Press, 434 pp.
Maiphae, S., Pholpunthin, P. & Dumont, H.J. (2008) Taxon richness and biogeography of the Cladocera (Crustacea: Ctenopoda, Anomopoda) of Thailand. International Journal of Limnology, 44 (1), 33–43.
Novichkova A.A., Kotov A.A. & Chertoprud E.S. (2020) Freshwater crustaceans of Bykovsky Peninsula and neighboring territory (Northern Yakutia, Russia). Arthropoda Selecta, 29 (1), 1–12.
Novichkova, A.A. & Chertoprud, E.S. (2015) Fauna of microcrustaceans (Cladocera: Copepoda) of shallow freshwater ecosystems of Wrangel Island (Russian Far East). Journal of Natural History, 49 (45–48), 2955–2968.
Sanoamuang, L. (1998) Contributions to the knowledge of the Cladocera of northeast Thailand. Hydrobiologia, 362, 45–53. https://doi.org/10.1023/A:1003111401684
Sharma, B.K. & Hatimuria, M.K. (2017). Zooplankton diversity of three floodplain lakes (beels) of the Majuli River Island, Brahmaputra river basin of Assam, northeast India. Journal of Aquaculture and Marine Biology, 6 (1), 00144.
Sinev, A.Y. (2014) A new and a rare species of Chydorus Leach, 1816 (Branchiopoda: Cladocera: Anomopoda) from Cat Tien National Park, Vietnam. Zootaxa, 3861 (2), 127–144. https://doi.org/10.11646/zootaxa.3861.2.2
Sinev A.Y. 2018. Genus Camptocercus (Cladocera: Anomopoda: Chydoridae) in North America. Zootaxa, 4459 (3), 583–599. https://doi.org/10.11646/zootaxa.4459.3.11
Sinev, A.Y. & Korovchinsky, N.M. (2013) Cladocera (Crustacea: Branchiopoda) of Cat Tien National Park, South Vietnam. Journal of Limnology, 72 (S2), 125–141.
Sinev, A.Y. & Gavrilko, D.E. (2021). Longitudinal gradient in the Camptocercus lilljeborgi Schoedler, 1862 species group (Cladocera: Anomopoda: Chydoridae). Zootaxa, 5047 (2), 123–138.
Sinev, A.Y., Gu, Y. & Han, B. (2015) Cladocera of Hainan Island, China. Zootaxa, 4006 (3), 569–585. https://doi.org/10.11646/zootaxa.4006.3.9
Smirnov, N.N. (1971) Chydoridae of the world fauna. Fauna SSSR. Rakoobraznie. Vol. 1 (2). Moscow, Nauka, 531 pp.
Smirnov, N.N. (1996) Cladocera: the Chydorinae and Sayciinae (Chydoridae) of the world. Guides to the identification of the microinvertebrates of the Continental Waters of the world, Vol. 11. SPB Academic Publishing, Amsterdam, 197 pp.
Smirnov, N.N. & Sheveleva, N.G. (2010). Chydorus irinae sp. n. (Anomopoda, Chydoridae, Chydorinae) from the Tom’ River (the Amur basin, Russia). Zoologicheskiy Zhurnal, 89, 635–638.
Sousa, F.D.R., Elmoor-Loureiro, L.M.A. & Santos, S. (2015) Redescription of Coronatella poppei (Richard, 1897) (Crustacea, Branchiopoda, Chydoridae) and a revision of the genus in Brazil, with descriptions of new taxa. Zootaxa, 3955 (2), 211– 244. https://dx.doi.org/10.11646/zootaxa.3955.2.3
Streletskaya, E.A. (1974) To the question on the faunistic research of rotifers, cladocerans and copepods of the water bodies of North-East Asia. In: Solomonov, N.G & Popov, M. V. (Eds.) Biological Problems of the North, Vol. 6. Yakutsk, SO RAN publisher, pp. 132–135. [in Russian]
Streletskaya, E.A. (1975a) List of the investigated rotifers, cladocerans and copepods of the water bodies of the Kolyma and Anadyr’ River basins. In: Novikov A.S. (Ed.), Hydrobiological Studies of the Inland Water Bodies in the North-East USSR. Vladivostok, DVNC, pp. 32–59. [in Russian]
Streletskaya, E.A. (1975b) To the question on the systematics of some freshwater crustaceans (Cladocera, Copepoda) of the Kolyma River basin. In: Novikov A.S. (Ed.), Hydrobiological Studies of the Inland Water Bodies in the North-East USSR. Vladivostok, DVNC, pp. 60–195. [in Russian]
Streletskaya, E.A. (2010) Review of the Fauna of Rotatoria, Cladocera, and Copepoda of the Basin of the Anadyr’ River. Contemporary Problems of Ecology, 2010, 3 (4), 469–480.
Shilin, Y.A. (1975) Some data on the zooplankton of the water bodies of lower Anadyr’ River. In: Novikov A.S. (Ed.), Hydrobiological Studies of the Inland Water Bodies in the North-East USSR. Vladivostok, DVNC, pp. 196–210. [in Russian]
Tyaptirgyanov, M.M., Kopyrina, L.I., Sokolova, V.A. & Teterin V.G. (2016) Current status of hydrobionts in downstream of the Kolyma River. Vestnik SVFU, 2 (52), 23–33. [in Russian]
Vvedenskaya T.L., Ulatov A.V. & Bonk T.V. (2013) Ecological state of Kultuchnoe Lake (East Kamchtka). In: Bugaev, V.F., Lobkov, E.G., Maksimenkov, V.V., Torkanov, A.M. & Chernyagina, O.A. (Eds.). Conservation of biodiversity of Kamchatka
and coastal waters. Abstracts of ХIV international scientific conference, Petropavlovsk-Kamchatsky, Kamchatpress, pp. 72–91. [in Russian]