Abstract
Alpinalona gen. nov. is described for two species found in high altitude localities of continental North America and South America: Alona manueli (Sinev & Zawisza, 2013) from the Neovolcanic Mexican Axis and Alpinalona cajasi gen. et sp. nov from El Cajas National Park (Ecuador). The new genus is separated from Hexalona and allies by the absence of limb VI and filter plate V; from Anthalona, Coronatella and the elegans-group by having seven setae on exopodite III, and by the presence of a well-developed seta 1 on the IDL of limb III; from Alona s. str. (quadrangularis-group) and Ovalona, by two main head pores, lateral head pores located close to main pores, and by a bilobed exopodite V; from Ovalona by the presence of seta (i) and inner setae 2–3 on limb I, and setae 4–5 of exopodite III being of same size; and from Alona s. lato by weakly developed marginal denticles of postabdomen, clusters of thin setulae on ventral surface of limb I, and by plumose setae 5–6 of exopodite IV. Alpinalona cajasi sp. nov. can be easily distinguished from A. manueli by the following characteristics: prominent posterodorsal angle of carapace; broader headshield; longer PP distance; and postanal marginal denticles organized into groups.
References
Briones, C. (2012) Estudio preliminar de la diversidad de cladóceros en el lago Chongón, Guayas.Tesis de grado, Universidad de Guayaquil, Guayaquil.
Colinvaux, P. & Steinitz, M. (1980) Species richness and area in Galapagos and Andean lakes: equilibrium phytoplankton communities and a paradox of the zooplankton. In: Kerfoot, W.C. (Ed.), Evolution and ecology of zooplankton communities. University Press of New England, Hannover, New Hampshire, pp. 697–712.
Delachaux, T. (1919) Cladocères des Andes Pèruviennes. Mémoires de la Sociét Neuchâteloise des Sciences Naturelles, 43, 18–38.
Dumont, H.J. & Silva-Briano, M. (2000) Karualona n.gen. (Anomopoda: Chydoridae), with a description of two new species, and a key to all known species. Hydrobiologia, 435, 61–82.
Hann, B.J. (1986) Revision of the genus Daphniopsis Sars, 1903 (Cladocera: Daphniidae) and a description of Daphniopsis chilensis, new species, from South America. Journal of Crustacean Biology, 6, 246–263.
Hudec, I. (1998) Anomopoda (Crustacea: Branchiopoda) from some Venezuelan tepuis. Hydrobiologia, 377, 205–211.
Kotov, A.A., Sinev, A.Y. & Berrios, V.L. (2010) The Cladocera (Crustacea: Branchiopoda) of six high altitude water bodies in the North Chilean Andes, with discussion of Andean endemism. Zootaxa, 2430, 1–66.
Kotov, A.A. & Taylor, D.J. (2010) A new African lineage of the Daphnia obtusa group (Cladocera: Daphniidae) disrupts continental vicariance patterns. Journal of Plankton Research, 32, 937–949.
López-Blanco, C. & Sinev, A.Y. (2016) Cladocera biodiversity in la Tembladera Lake (Ecuador): a palaeolimnological approach. Crustaceana, 89 (14), 1611–1637.
Sinev, A.Y. (2004) Armatalona gen. n. – a new genus of subfamily Aloninae (Anomopoda, Chydoridae), separated from genus Alona Baird, 1840. Hydrobiologia, 420, 29–47.
Sinev, A.Y. (2012) Alona kotovi sp. nov., a new species of Aloninae (Cladocera: Anomopoda: Chydoridae) from South Vietnam. Zootaxa, 3475, 45–54.
Sinev, A.Y. (2015) Revision of the pulchella-group of Alona s. lato leads to its translocation to Ovalona Van Damme et Dumont, 2008 (Branchiopoda: Anomopoda: Chydoridae). Zootaxa, 4044 (4), 451–492.
http://dx.doi.org/10.11646/zootaxa.4044.4.1Sinev, A.Y. & Dumont, H.J. (2016) Revision of costata-group of Alona s. lato (Cladocera: Anomopoda: Chydoridae) confirms its generic status. European Journal of Taxonomy, 233, 1–38.
http://dx.doi.org/10.5852/ejt.2016.223Sinev, A.Y. & Kobayashi, T. (2012) Redescription of the endemic Australian cladoceran Alona willisi (Smirnov, 1989) and its assignment to Acanthalona gen. nov. (Cladocera: Anomopoda: Chydoridae). Zootaxa, 3390, 43–55.
Sinev, A.Y. & Kotov, A.A. (2012) New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa, 3334, 1–28.
Sinev, A.Y. & Shiel, R.J. (2008) Redescription of Alona macracantha Smirnov and Timms, 1983 and its assignment to Maraura gen. nov. (Cladocera: Anomopoda: Chydoridae). Journal of Natural History, 42, 45–46, 2809–2824.
Sinev A.Y., Silva-Briano, M. (2012) Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa, 3569, 1–24.
Sinev, A.Y., Van Damme, K. & Kotov, A.A. (2005) Redescription of tropical-temperate cladocerans Alona diaphana King, 1853 and Alona davidi Richard, 1895 and their translocation to Leberis Smirnov, 1989 (Branchiopoda:Anomopoda: Chydoridae). Arthropoda Selecta, 14 (3), 183–205.
Sinev, A.Y. & Coronel, J.C. (2006) A new species of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) from the Bolivian Andes. Archive fuer Hydrobiologie, Supplement, 151 (4), 395–408.
Sinev, A.Y. & Zawisza, E. (2013) Comments on cladocerans of crater lakes of the Nevado de Toluca Volcano (Central Mexico), with the description of a new species, Alona manueli sp. nov. Zootaxa 3647 (2), 390–400.
http://dx.doi.org/10.11646/zootaxa.3647.2.10Sinev, A.Y., Tiang-nga, S. & Sanomuang, L. (2017) New genus of Cladocera of subfamily Aloninae (Anomopoda: Chydoridae) from the Mekong River. Zootaxa, 4276 (3), 416–426.
https://doi.org/10.11646/zootaxa.4276.3.6
Sousa F.D.R., Elmoor-Loureiro, L.M.A. & Santos, S. (2016a) New findings of Hexalona-branch representatives in Brazil, with a description of Prenda gen. nov. (Crustacea: Anomopoda: Aloninae), Journal of Natural History.
http://dx.doi.org/10.1080/00222933.2016.1208302Sousa, F.D.R., Elmoor-Loureiro, L.M.A. & Santos, S. (2016b) Position of the dentifera-group in the Coronatella-branch and its relocation to a new genus: Magnospina gen. n. (Crustacea, Chydoridae, Aloninae). ZooKeys, 586, 95–119.
http://dx.doi.org/10.3897/zookeys.586.8209Smirnov, N.N. (1996) New or rare species of Chydoridae (Crustacea Anomopoda). Arthropoda Selecta, 5, 3–17.
Torres, L.E. & Rylander, K. (2006) Diversity and abundance of littoral cladocerans and copepods in nine Ecuadorian highland lakes. Int. J. Trop. Biol., 54 (1), 131–137.
Van Colen, W.R., Mosquera, P., Vanderstukken, M., Goiris, K., Carrasco, M.-C., Decaestecker, E., Alonso, M., León-Tamariz, F. & Muylaert, K. (2016) Limnology and trophic status of glacial lakes in the tropical Andes (Cajas National Park, Ecuador). Freshwater Biology .
http://dx.doi.org/10.1111/fwb.12878
Van Damme, K., Brancelj, A. & Dumont, H.J. (2009) Adaptations to the hyporheic in Aloninae (Crustacea: Cladocera): allocation of Alona protzi Hartwig, 1900 and related species to Phreatalona gen. nov. Hydrobiologia, 618, 1–34.
Van Damme, K. & Dumont, H.J. (2008a) Further division of Alona Baird, 1843: separation and position of Coronatella Dybowski & Grochowski and Ovalona gen.n. (Crustacea: Cladocera). Zootaxa, 1960, 1–44.
Van Damme, K. & Dumont, H.J. (2008b) The ‘true’ genus Alona Baird, 1843 (Crustacea: Cladocera: Anomopoda): characters of the A. quadrangularis-group and description of a new species from Democratic Republic Congo. Zootaxa, 1943, 1–25.
Van Damme, K., Kotov, A.A. & Dumont, H.J. (2010) A checklist of names in Alona Baird 1843 (Crustacea: Cladocera: Chydoridae) and their current status: an analysis of the taxonomy of a lump genus. Zootaxa, 2330, 1–63.
Van Damme, K. & Sinev, A.Y. (2011) A new genus of cave-dwelling microcrustaceans from the Dinaric Region (south-east Europe): adaptations of true stygobitic Cladocera (Crustacea: Branchiopoda). Zoological Journal of the Linnean Society, 161, 31–52.
Van Damme, K., Sinev, A.Y. & Dumont, H.G. (2011) Separation of Anthalona gen.n. from Alona Baird, 1843 (Branchiopoda: Cladocera: Anomopoda): morphology and evolution of scraping stenothermic alonines. Zootaxa, 2875, 1–64.
Van Damme, K. & Eggermont, H. (2011) The Afromontane Cladocera (Crustacea: Branchiopoda) of the Rwenzori (Uganda – D. R. Congo): taxonomy, ecology and biogeography. Hydrobiologia, 676, 57–100.
Van Damme, K. & Maiphae, S. (2013) Salinalona gen. nov., an euryhaline chydorid lineage (Crustacea: Branchiopoda: Cladocera: Anomopoda) from the Oriental region. Journal of Limnology, 72 (s2), 142–173.