Abstract
We investigate morphology and taxonomic rank of several Alona species related to A. rectangula Sars, 1861. Despite high morphological intraspecific variability, a number of synapomorphies shows that taxa related to A. rectangula are sufficiently different in external and internal morphology from “true” Alona Baird, 1843. These are removed from Alona into separate genera. The rare West-African A. holdeni Green 1962 is redescribed and we describe a new species from North Africa, Arabia and islands in the Western Indian Ocean. We reinstate the name Coronatella Dybowski & Grochowski to receive A. rectangula, A. holdeni, and a new species, C. anemae. Sharing several synapomorphies, the subantarctic species A. weinecki Studer appears related to A. meridionalis Sinev, 2006. We assign them to Ovalona gen.n., similar in morphology to Coronatella, but with less limb reductions. At a higher level, we discuss morphology and distribution of both genera and of the similar A. elegans-group. To situate Coronatella within the subfamily, we introduce a “Coronatella-branch”, a group of medium-sized Aloninae with limb reductions, comprising Coronatella, Leberis, Celsinotum, A. dentifera, A. monacantha and possibly Karualona and A. verrucosa-group, in comparison with a “Hexalonabranch” and Alona s.str. Adaptations to life in temporary pools and salinity tolerance may have played an important role in separation and radiation of a Coronatella-branch.References
Alonso, M. (1996) Crustacea, Branchiopoda. In: Ramos, M.A. et al. (Eds), Fauna Ibérica. Vol. 7. Museo Nacional de Ciencias Naturales, CSIC, Madrid, 486 pp.
Brancelj, A. (1990) Alona hercegovinae n.sp. (Cladocera, Chydoridae), a blind cave-inhabiting cladoceran from Hercegovina (Yugoslavia). Hydrobiologia, 199, 7–16.
Chen, S., Zhang, E. & Liu, H. (1993) A new species of Alona rectangula (Crustacea: Diplostraca). Sichuan Journal of Zoology, 13, 101–102.
Delachaux, T. (1917) Cladocères de la région du lac Victoria Nyanza. Revue Suisse de Zoologie, 25, 77–93.
Dumont, H.J. & Martens, K. (1996) The freshwater microcrustacea of Easter Island. Hydrobiologia, 325, 83–99.
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.
Dumont H.J., Van de Velde, I. (1975) Anostraca, Cladocera and Copepoda from Rio de Oro (North-Westem. Sahara). Biologisch Jaarboek Dodonaea, 43, 137–145.
Dumont, H.J. & Van De Velde, I. (1979) Report on a collection of Cladocera and Copepoda from Nepal. Hydrobiologia, 53, 55–65.
Dumont, H.J., Laureys, P. & Pensaert, J. (1979) Anostraca, Conchostraca and Copepoda from Tunisia. Hydrobiologia, 66, 259–274.
Dumont, H.J., Pensaert, J. & el Moghraby, A.I. (1984) Cladocera from the Sudan: Red Sea Hills, Jebel Marra and valley of the main Nile. Hydrobiologia, 110, 163–169.
Dybowski, B. & Grochowski, M. (1894) O Lynceidach czyli Tonewkach fauny krajowej. Kosmos, 10, 139–165.
Ekman, S. (1904) Cladoceren und freilebende Copepoden aus Ägypten und dem Sudan. Results of the Swedish Zoological Expedition to Egypt and the White Nile, 1901, under the direction of L.A. Jägerskiöld, 1, 1–18.
Ekman, S. (1905) Cladoceren und Copepoden aus Antarktischen und Subantarktischen Binnengewässern gesammelt von der Schwedischen Antarktischen Expedition 1901–1903. Wissenschaftliche Ergebnisse der Schwedischen Südpolar-Expedition 1901-1903, 5(4), 1–40.
Elías-Guttiérez, M., Martínez Jerónimo, F., Ivanova, N.V., Valdez-Moreno, M. & Hebert, P.D.N. (2008) DNA barcodes for Cladocera and Copepoda from Mexico and Guatemala, highlights and new discoveries. Zootaxa, 1839, 1–42.
Flößner, D. (1972) Krebstiere, Crustacea. Kiemen- und Blattfüsser, Branchiopoda. Fischlause, Branchiura. Die Tierwelt Deutschlands und der angrenzenden Meeresteile nach ihren Merkmalen und nach ihrer Lebensweise, Fischer Verlag, Jena, 60, 501pp.
Flößner, D. (2000) Die Haplopoda und Cladocera (ohne Bosminidae) Mitteleuropas. Backhuys Publishers, Leiden, Netherlands, 428 pp.
Flößner, D., Wolfgang, H. & Paul, M. (2005) Notes on the Cladoceran and Copepod Fauna of the Uvs Nuur Basin (Northwest Mongolia). International Review of Hydrobiology, 90, 580–595.
Frenzel, P. (1987) Theodor Stingelin (1872-1932): Typen und Status seiner Cladoceren-Taxa. Archiv für Hydrobiologie, Supplement, 74, 488–507.
Frenzel, P. & Alonso, M. (1988) Alona azorica sp.nov., a new chydorid (Cladocera) from the Western Palaearctis. Archiv Für Hydrobiologie, 112, 449–465.
Frey, D.G. (1988) Alona weinecki Studer on the subantarctic islands, not Alona rectangula Sars (Chydoridae, Cladocera) Limnology and Oceanography, 33, 1386–1411.
Frey, D.G. (1991) A new genus of alonine chydorid cladocerans from athalassic saline waters of New South Wales, Australia. Hydrobiologia, 224, 11–48.
Frey, D.G. (1993) The penetration of cladocerans into saline waters. Hydrobiologia, 267, 233–248.
Fryer, G. (1957) Freeliving freshwater Crustacea from Lake Nyasa and adjoining waters. Part II. Cladocera and Conchostraca. Archiv für Hydrobiologie, 53, 223–239.
Fryer, G. (1968) Evolution and adaptive radiation in the Chydoridae (Crustacea: Cladocera): a study in comparative functional morphology and ecology. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 795, 221–385.
Green, J. (1962) Zooplankton of the River Sokoto. The Crustacea. Proceedings of the Zoological Society London, 138, 415–453.
Hammer, U.T. (1986) Saline lake ecosystems of the world. Monographiae biologicae, 59, Junk Publishers, Dordrecht, 574 pp.
Jenkin, P.M. (1934) Report on the Percy Sladen Expedition to some Rift Valley Lakes in Kenya in 1929. VI. Cladocera from the Rift Valley Lakes in Kenya. Annals and Magazines of Natural History, series 10, 13, 137–160 and 281–308 (in two parts).
Kotov, A.A. (2000) Redescription and assignment of the chydorid Indialona ganapati Petkovski, 1966 (Branchiopoda: Anomopoda: Aloninae) to Indialonini, new tribus. Hydrobiologia, 439, 161–178.
Kotov, A.A. & Gololobova, M.A. (2005) Types of cladoceran species described by Sven Ekman in the Swedish Museum of Natural History, with redescription of Daphnia cavicervix Ekman, 1900 (Daphniidae, Anomopoda, Cladocera). Journal of Natural History, 39, 3059-3074.
Kotov, A.A. & Sanoamuang, L. (2004) Comments on the morphology of Nicsmirnovius eximius (Kiser, 1948) (Aloninae, Anomopoda, Cladocera) in Thailand, with description of its male. Hydrobiologia, 519, 117–125.
Kurz, W. (1875) Dodekas neuer Cladoceren nebst einer kurzen Übersicht der Cladocerenfaunas Böhmens. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Klasse, LXX, 1, 7–88.
Margaritora, F.G. (1985) Cladocera. In: Fauna d’Italia. Baccetti et al. Edizioni Calderini (Eds.) Bologna, Italy, 399 pp.
Paggi, J.C. (1987) Estudios limnológicos en la isla Decepción, Shetland del Sur, Antártica: Aspectos taxonómicos de los crustáceos del zooplancton. Contribución del Instituto Antártico Argentino, 338, 1–34.
Pesta, O. (1928) Eine Crustaceenausbeute aus Süd-Georgien (Antarktis). Annalen des Naturhistorischen Museum in Wien, 27, 75–86.
Pugh, P.J.A., Dartnall, H.J.G. & McInnes, S.J. (2002) The non-marine Crustacea of Antarctica and the Islands of the
Southern Ocean: biodiversity and biogeography. Journal of Natural History, 36, 1047–1103.
Rey J. & Vasquez, E. (1986) Cladocères de quelques corps d’eaux du bassin moyen de l’Orénoque (Vénézuéla) Annales de Limnologie, 22, 137–168.
Rey J. & St-Jean, L. (1969) Les Cladocères (Crustacés Branchiopodes) du Tchad (Deuxième note) Cahiers O.R.S.T.R.O.M., série Hydrobiologie, 3, 21–42.
Richard, J. (1897) Entomostracés de l’Amerique du Sud, recueillis par MM U. Deiters, H. von Ihering, G.W. Müller et C.O. Poppe. Mémoires de la Société Zoologique de France, 10, 263–301.
Rühe, F.E. (1914) Die Süsswassercrustaceen des Deutschen Südpolar-Expedition 1901-1903, mit Aussechlüss der Ostracoden. In: Drygalski, E. von (Ed), Deutsche Südpolar-Expedition 1901–1903, Vol. 8. Zoologie. Berlin, pp. 3–66.
Sars, G.O. (1894) Contributions to the knowledge of the Fresh-water Entomostraca of New Zealand as shown by artificial hatching from dried mud. Videnskabs-Selskabets Skrifter. I. Mathematisk-Naturvidenskabelig Klasse, 5, 1–62.
Sars, G.O. (1904) Pacifische Plankton-Crustaceen. Zoologische Jahrbücher Abteilung für Systematik, Oekologie und Geographie der Tiere, 19, 629–646.
Sars, G.O. (1909) Freshwater Entomostraca from South Georgia. Archiv for Mathematik og Naturvidenskab, Christiana, 30, 1–35.
Sars, G. O. (1916) The fresh-water Entomostraca of the Cape Province (Union of South Africa) Part 1: Cladocera. Annals of the South African Museum, 15, 303–351.
Sinev, A.Y. (1997) Review of the affinis-group of Alona Baird, 1843, with the description of a new species from Australia (Anomopoda Chydoridae). Arthropoda Selecta, 6, 47–58.
Sinev, A.Y. (1999a) Alona costata Sars, 1862 versus related palaeotropical species: the first example of close relations between species with a different number of main head pores among Chydoridae (Crustacea: Anomopoda). Arthropoda Selecta, 8, 131–148.
Sinev, A.Y. (1999b) Alona werestschagini sp. n., new species of genus Alona Baird, 1843, related to A. guttata Sars, 1862 (Anomopoda, Chydoridae). Arthropoda Selecta, 8, 23–30.
Sinev, A. Y. (2001a) Separation of Alona cambouei Guerne & Richard, 1893 from Alona pulchella King, 1853 (Branchiopoda, Anomopoda, Chydoridae). Arthropoda Selecta, 10, 5–18.
Sinev, A.Y. (2001b) Distribution and polymorphism of Alona rectangula Sars, 1862 (Branchiopoda: Cladocera: Anomopoda) in Russia and surrounding countries. Arthropoda Selecta, 10, 83–86.
Sinev, A.Y. (2004a) Redescription of a South American cladocera, Alona monacantha Sars, 1901 (Branchiopoda: Anomopoda: Chydoridae). Arthropoda Selecta, 13, 7–12.
Sinev, A.Y. (2004b) Armatalona gen. n. – a new genus of subfamily Aloninae (Anomopoda, Chydoridae), separated from genus Alona Baird, 1840. Hydrobiologia, 420, 29–47.
Sinev, A.Y. & Hollwedel, W. (2002) Alona brandorffi sp.n. (Crustacea: Anomopoda: Chydoridae) – a new species from Brazil, related to A. verrucosa Sars, 1901. Hydrobiologia, 472, 131–140.
Sinev A.Y., Kotov A.A. & Van Damme K. (2004) Morphology of a Neotropical cladoceran Alona dentifera (Sars, 1901), and its position within the Chydoridae Stebbing, 1902 (Branchiopoda: Anomoda). Arthropoda Selecta, 13, 99–107.
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, 183–205.
Sinev, A.Y. (2006) Alona meridionalis sp.n. - a new species of Chydoridae (Branchiopoda: Cladocera: Anomopoda) from South Africa, with transverse lateral head pores. Arthropoda Selecta, 15, 193–202.
Smirnov, N.N. (1971) Chydoridae fauny mira. Fauna USSR. Rakoobraznie, 1, Leningrad, 531 pp. (English translation: Chydoridae of the world. Israel Program for Scientific Translations, Jerusalem, 1974).
Smirnov, N.N. & Timms, B. (1983) A revision of the Australian Cladocera. Records of the Australian Museum Supplement, 1, 1–132.
Studer, T. (1878) Beitrage zur Naturgeschichte wirbellose Thiere von Kerguelensland. Archiv für Naturgeschichte, Berlin, 44, 102–121.
Van Damme K., Chiambeng, G., Maiphae, S. & Dumont, H.J. (2003) New species in the rheophilous genus Nicsmirnovius Chiambeng & Dumont, 1999 (Branchiopoda: Anomopoda: Chydoridae) and reassignment of Alona eximia Kiser, 1948 and Alonella fitzpatricki Chien, 1970. Hydrobiologia, 499, 25–49.
Van Damme, K., Dumont, H. J. & Weekers, P.H. (2004) Anostraca (Crustacea: Branchiopoda) from Socotra Island (Yemen): A new Branchipodopsis and its relation to African and Asian congeners. Fauna of Arabia, 20, 193–209.
Van Damme, K. & Dumont, H.J. (2007) Limb morphology of the carnivorous anomopods Anchistropus emarginatus Sars, 1862 and Pseudochydorus globosus (Baird, 1843) (Crustacea: Branchiopoda: Anomopoda). Annales de Limnologie-International Journal of Limnology, 43, 271–284
Van Damme, K. & Dumont, H.J. (2008) 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 De Velde, I. & Dumont, H.J. (1982) Recherches Scientifiques dans les Parcs Nationaux du Sénégal. VII. Cladocères et Copépodes du Parc National du Niokolo-Koba. Mémoires de L’institut Fondamental d’Afrique Noire, 92, 123–132.
Weltner, W. (1897) Die Cladoceren Ost-Africas. Deutsch-Ost-Africa, 4, 1–14.
Zhang, S., Chen, S. & Deng, X. (1997) Two new records of Cladocera in China (Crustacea: Diplostraca). Journal of Huazhong Agricultural University, 16, 71–73.