Abstract
In this study, we investigated cladocerans (Crustacea: Branchiopoda) collected in six water bodies from the Upper Xingu River Basin, Central Brazil. In total, we found eighteen species belonging to three families. Furthermore, we also describe a new and highly specialized genus of Chydoridae. Kisakiellus aweti gen. nov., sp. nov. which shares some morphological traits with members of Chydorinae, particularly the exopodite of the fourth limb armed with seven setae. The new genus bears several autapomorphies and does not exhibit any clear affinities with any other genus of the subfamily. Apparently, K. aweti gen. nov., sp. nov. has a positive rheotactic behavior and the morphological characters related to this habitat trait are discussed. Many regions of the Upper Xingu River Basin are still in need of faunal inventories, a fact that gains more relevance due to the high potential for cryptic biodiversity. So, it is possible that an increase on the sampling effort in this basin will have a positive impact on the known diversity of Cladocera.
References
Alonso, M. (1990) Estatheroporus gauthieri, new species, new genus (Cladocera: Chydoridae), from Mediterranean Countries. Journal of Crustacean Biology, 10 (1), 148–161.
https://doi.org/10.1163/193724090X00339Alves, P.V., Chambrier, A., Scholz, T. & Luque, J.L. (2015) A new genus and species of proteocephalidean tapeworm (Cestoda), first parasite found in the driftwood catfish Tocantinsia piresi (Siluriformes: Auchenipteridae) from Brazil. Folia Parasitologica, 62, 6.
https://doi.org/10.14411/fp.2015.006Belyaeva, M. & Taylor, D.J. (2009) Cryptic species within the Chydorus sphaericus species complex (Crustacea: Cladocera) revealed by molecular markers and sexual stage morphology. Molecular Phylogenetics and Evolution, 50, 534–546.
https://doi.org/10.1016/j.ympev.2008.11.007Brasil, L.S., Giehl, N.F.S., Santos, J.O., Valadão, M.B.X., Almeida, S.M., Pinto, N.S. & Batista, J.D. (2014) Does the damming of streams in the southern Amazon basin affect dragonfly and damselfly assemblages (Odonata: Insecta)? A preliminary study. International Journal of Odonatology, 17, 187–197.
https://doi.org/10.1080/13887890.2014.963712Butwell, B. (2012) A penny for your thoughts: An evolutionary history of the Australian Psephnidae (Coleoptera). Ph. D. Thesis, Griffith University, South East Queesland, 190pp.
Dumont, H.J. & Pensart, J. (1983) A revision of the Scapholeberinae (Crustacea: Cladocera). Hydrobiologia, 100, 3–45.
https://doi.org/10.1007/BF00027420Elmoor-Loureiro, L.M.A. (1997) Manual de identificação dos Cladóceros Límnicos do Brasil. Universa, Brasília, 156 pp.
Elmoor-Loureiro, L.M.A. (2004) Phylogenetic relationships among families of the Order Anomopoda (Crustacea, Branchiopoda, Cladocera). Zootaxa, 760 (1), 1–26.
https://doi.org/10.11646/zootaxa.760.1.1Elmoor-Loureiro, L.M.A. (2014) Ephemeroporus quasimodo sp. nov. (Crustacea: Cladocera: Chydoridae), a new species from the Brazilian Cerrado. Zootaxa, 3821 (1), 88–100.
https://doi.org/10.11646/zootaxa.3821.1.6Frey, D.G. (1959) The taxonomic and phylogenetic significance of the head pores of the Chydoridae (Cladocera). International Review of Hydrobiology, 44 (1–4), 27–50.
https://doi.org/10.1002/iroh.19590440104Frey, D.G. (1982) Relocation of the Chydorus barroisi and related species (Cladocera, Chydoridae) to a new genus and description of two new species. Hydrobiologia, 86, 231–269.
https://doi.org/10.1007/BF00006141Fryer, G. (1968) Evolution and adaptive radiation in the Chydoridae (Crustacea: Cladocera): a study in comparative functional morphology and ecology. Philosophical Transations of the Royal Society London, Serie B, 254 (795), 221–384.
https://doi.org/10.1098/rstb.1968.0017Fryer, G. (1968) Functional Morphology and the adaptive radiation of the Daphniidae (Branchiopoda: Anomopoda). Philosophical Transations of the Royal Society London, Series B, 331 (1259), 1–99.
https://doi.org/10.1098/rstb.1991.0001Jeong, 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.4341.4.1Kotov, AA. (2000a) Analysis of Kozhowia Vasiljeva & Smirnov, 1969 (Chydoridae, Anomopoda, Branchiopoda), and a description of Parakozhowia gen. n. Hydrobiologia, 437, 17–56.
https://doi.org/10.1023/A:1026507529975Kotov, A.A. (2000b) Redescription and assignment of the chydorid Indialona ganapati Petkovski, 1966 (Branchiopoda: Anomopoda: Aloninae) to Indialonini, new tribus. Hydrobiologia, 439, 161–178.
https://doi.org/10.1023/A:1004187007890Kotov, A.A. (2008) Finding of Pleuroxus smirnovi sp. nov. from the Pamir region revealed today's imperfect state of systematics and biogeography of the Chydorinae (Cladocera: Chydoridae). International Revue of Hydrobiology, 93 (2), 200–209.
https://doi.org/10.1002/iroh.200711007Kotov, 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.
Kullander, S.O. (2012) Krobia xinguensis, a new species of cichlid fish from the Xingu River drainage in Brazil (Teleostei: Cichlidae). Zootaxa, 3197, 43–54.
Lees, A.C., Peres C., Fearnside, P.M., Schneider, M. & Zuanon, J.A.S. (2016) Hydropower and the future of Amazonian biodiversity. Biodiversity and Conservation, 25, 451–466.
https://doi.org/10.1007/s10531-016-1072-3Matsumura-Tundisi, T., Tundisi, J.E.M., Faria, C.R.L., Abe, D.S., Blanco, F.P., Rodrigues-Filho, J., Campanelli, L.C., Galli, C.S., Teixeira-Silva, V., Degani, R.M., Soares, F.S. & Gatti-Junior, P. (2015) Limnological and ecological methods: approaches, and sampling strategies for Middle Xingu River in the area of influence of future Belo Monte Power Plant. Brazilian Journal of Biology, 75, 16–29.
https://doi.org/10.1590/1519-6984.03614BMMcShaffrey, D. & McFFerty, W.P. (1987) The behavior and form of Psephenus herricki (DeKay) (Coleoptera: Psephenidae) in relation to water flow. Freshwater Biology, 18, 319–324.
https://doi.org/10.1111/j.1365-2427.1987.tb01316.xNeretina, A.N., Garibian, P.G., Sinev, A.Y. & Kotov A.A. (2017) Diversity of the subgenus Disparalona (Mixopleuroxus) Hudec, 2010 (Crustacea: Cladocera) in the New and Old World. Journal of Natural History, 52, 155–205.
https://doi.org/10.1080/00222933.2017.1411987Olesen, J. (1998) A phylogenetic analysis of the Conchostraca and Cladocera (Crustacea, Branchiopoda, Diplostraca). Zoological Journal of the Linnean Society, 122, 491–536.
https://doi.org/10.1111/j.1096-3642.1998.tb02161.xSacherová, V. & Hebert, P.D.N. (2003) The evolutionary history of the Chydoridae (Crustacea: Cladocera). Biological Journal of the Linnean Society, 79, 629–643.
https://doi.org/10.1046/j.1095-8312.2003.00216.xSawakuchi, A.O., Hartman, G. A., Sawakuchi, H.O., Pupin, F.N., Bertassoli, D.J., Parra, M., Antoniao, J.L., Sousa, L.M., Sabaj-Pérez, M.H., Oliveira P.E., Santos, R.A, Savian, J.F., Grohmann, C.H., Medeiros, V.B., McGlue, M.M., Bicudo, D.C. & Faustino, S.B. (2015) The Volta Grande do Xingu: reconstruction of past environments and forecasting of future scenarios of a unique Amazonian fluvial landscape. Scientific Drilling, 20, 21–32.
https://doi.org/10.5194/sd-20-21-2015Sinev, A.Y. (2015) Morphology and phylogenetic position of three species of genus Camptocercus Baird, 1843 (Cladocera: Anomopoda: Chydoridae). Zootaxa, 4040 (2), 169–186.
https://doi.org/10.11646/zootaxa.4040.2.4Sinev, A.Y. (2017) Morphology, systematics and zoogeography of the cladocerans of subfamily Aloninae (Cladocera: Anomopoda: Chydoridae). Dr.Sci. Thesis, Biological Faculty of M.V. Lomonosov Moscow State University, Moscow, 428 pp.
Sinev, A.Y. & Elmoor-Loureiro, L.M.A. (2010) Three new species of Chydoridae cladocerans of subfamily Aloninae (Branchiopoda: Anomopoda: Chydoridae) from Brazil. Zootaxa, 2390, 1–25.
Sinev, A.Y. & Dumont, H. 2016. Revision of the costata-group of Alona s. lato (Cladocera: Anomopoda: Chydoridae) confirms its generic status. European Journal of Taxonomy, 223, 1–28.
https://doi.org/10.5852/ejt.2016.223Sinev, A.Y. & Yusoff, F.M. (2016) A new species of genus Ephemeroporus Frey, 1982 (Cladocera: Anomopoda: Chydoridae) from Peninsular Malaysia. Zootaxa, 4117 (3), 399–410.
http://doi.org/10.11646/zootaxa.4117.3.7Smirnov, N.N. (1964) The Taxonomic Significance of the Trunk Limbs of the Chydoridae (Cladocera). Hydrobiologia, 27 (3), 337–343.
https://doi.org/10.1007/BF00042696Smirnov, N.N. (1971) Chydoridae fauny mira. Fauna USSR, Rakoobraznie, 1 (2), 1–531.
Smirnov, N.N. (1992) The Macrothricidae of the world. SPB Academic Publishing, Amsterdan, 143 pp.
Smirnov, N.N. (1996) Cladocera: the Chydorinae and Sayciinae (Chydoridae) of the world. SPB Academic Publishing, Amsterdam, 197 pp.
Smirnov, N.N. (2013) Physiology of the Cladocera. Elsewier, 333 pp.
Smirnov, N.N. & Kotov, A.A. (2009) Morphological radiation with reference to the carapace valves of the Anomopoda (Crustacea: Cladocera). International review of Hydrobiology, 94 (5), 580–594.
https://doi.org/10.1002/iroh.200811121Smirnov, N.N. & Timms, B. (1983) A revision of the Australian Cladocera. Records of the Australian Museum, 1, 1–132.
https://doi.org/10.3853/j.0812-7387.1.1983.103Smith, J.A. & Dartnall, A.J. (1980) Boundary layer control by water pennies (Coleoptera: Psephenidae). Aquatic Insects: International Journal of Freshwater Entomology, 2, 65–72.
https://doi.org/10.1080/01650428009361008Sousa, F.D.R. & Elmoor-Loureiro, L.M.A. (2013) Cladocerans (Crustacea: Anomopoda and Ctenopoda) of the Sempre Vivas National Park, Espinhaço Range, Minas Gerais, Brazil. Check List, 9 (1), 4–8.
Sousa, F.D.R. & Elmoor-loureiro, L.M.A. (2017) Zip code matters: Nicsmirnovius paggii, a new species from fitzpatricki-complex (Cladocera, Chydoridae) does not co-occur with Nicsmirnovius incredibilis. Journal of Natural History, 51 (31–32), 1–24.
https://doi.org/10.1080/00222933.2017.1358773Sousa, F.D.R., Elmoor-Loureiro, L.M.A., Debastiani-Júnior, J.R., Mugnai, R. & Senna, A. (2015) New records of Anthalona acuta Van Damme, Sinev & Dumton, 2011 and Anthalona brandorfii (Sinev & Hollwedel, 2002) in Brazil, with description of a new species of the simplex-branch (Crustacea: Cladocera: Chydoridae). Zootaxa, 4044 (2), 224–240.
https://doi.org/10.11646/zootaxa.4044.2.3Sousa, F.D.R., Elmoor-Loureiro, L.M.A. & Panarelli, E.A. (2017) The Amazing diversity of the genus Monospilus Sars, 1862 (Crustacea: Branchiopoda: Aloninae) in South America. Zootaxa, 4242 (3), 467–492.
https://doi.org/10.11646/zootaxa.4242.3.3Thomaz, S.M. & Cunha, E.R. (2010) The role of macrophytes in habitat structuring in aquatic ecosystems: methods of measurement, causes and consequences on animal assemblages’ composition and biodiversity. Acta Limnologica Brasiliensia, 22 (2), 218–236.
https://doi.org/10.4322/actalb.02202011Tundisi, J.G., Soares, F.S. & Tundisi, J.E.M. (2015) Zooplankton community structure of the lower Xingu River (PA) related to the hydrological cycle. Brazilian Journal of Biology, 75, 47–54.
https://doi.org/10.1590/1519-6984.03814BMVan Damme, K. (2010) A revision of the genus Alona Baird, 1843 (Crustacea: Branchiopoda: Anomopoda). Ph. D. Thesis, The Sate University of Ghent, Ghent, 506 pp.
Van Damme, K. (2016) Endemism and long distance dispersal in the waterfleas of Easter Island. Zootaxa, 4139 (3), 221–232.
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, 43, 271–284.
https://doi.org/10.1051/limn:2007005Van Damme, K. & Sinev, A.Y. (2011) A new genus of cave-dwelling microcrustaceans from the Dinaric Region (SE-Europe): adaptations of true stygobitic Cladocera (Crustacea: Branchiopoda). Zoological Journal of the Linnean Society, 161 (1), 31–52.
https://doi.org/10.1111/j.1096-3642.2010.00639.xVan 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 of Phreatalona gen. nov. Hydrobiologia, 618 (1), 1–34.
https://doi.org/10.1007/s10750-008-9607-6Velasquez, C., Queiroz, B. & Bernasconi, P. (2010) A Bacia do Rio Xingu no Mato Grosso. Série Cartô Brasil Socioambiental, 2, 1–40.
Viroux, L. (2002) Seasonal and Longitudinal aspects of microcrustacean (Cladocera: Copepoda) dynamics in lowland river. Journal of Plankton Research, 24 (4), 281–292.
https://doi.org/10.1093/plankt/24.4.281Volkmer-Ribeiro, C. (2017) Drulia cristinae, new species of sponge from the rio Xingu, Amazonas Basin, Brazil (Porifera: Demospongiae: Poecilosclerida: Metaniidae Volkmer-Ribeiro, 1986). Proceedings of the Academy of Natural Sciences of Philadelphia, 166, 1–17.
https://doi.org/10.1635/053.166.0101Zuluaga-Goméz, A., Fitzgerald, D.B., Giarrizzo, T. & Winemiller, K. (2016) Morphologic and trophic diversity of fish assemblages in rapids of the Xingu River, a major Amazon tributary and region of endemism. Environmental Biology of Fishes, 99, 647–658.
https://doi.org/10.1007/s10641-016-0506-9