Abstract
The aim of this study is to describe the limb morphology of Alonella dadayi Birge (Cladocera: Chydorida) and this species’ morphometric variability regarding the carapace and postabdomen. We report for the first time a population whose individuals do not have denticles on the posteroventral corner of the carapace. Although we have observed intra- and interpopulation variability of the limbs (especially the proportion of Inner Distal Lobe setae), Alonella dadayi can also be differentiated from closely related species by the morphology of the exopodite of the second limb. The morphometric analyses show high variability in the shape of the carapace, when regarding the ventral margin and posterodorsal corner. In the postabdomen, we observed a significant variation in the preanal, anal and postanal margins. Keeping in mind the wide range of the geographic distribution of Alonella dadayi and its high morphological variability, it is possible that this taxon comprises a species complex. Such a chance needs to be tested in future studies.
References
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https://doi.org/10.11646/zootaxa.4290.3.11
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https://doi.org/10.1080/00222933.2016.1208302
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Van Damme, K. (2016) Endemism and long distance dispersal in the waterfleas of Easter Island. Zootaxa, 4139 (3), 221–232.
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Van Damme, K. & Dumont, H.J. (2010) Cladocerans of the Lençóis Maranheses (NE-Brazil): faunal composition and a reappraisal of Sars’ Method. Brazilian Journal of Biology, 70, 755–779.
https://doi.org/10.1590/S1519-69842010000400008
Van Damme, K. & Dumont, H.J. (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., 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/s10750-008-9607-6
Van de Velde, I., Dumont, H.J. & Grootaert, P. (1978) Report on a collection of Cladocera from Mexico and Guatemala. Archiv für Hydrobiologie, 83 (3), 391–404.
Alonso, M. & Kotov, A.A. (2017) A new species of Alonella Sars, 1862 (Crustacea: Cladocera: Chydoridae) from the Ecuadorian Andes. Zootaxa, 4290 (3), 581–590.
https://doi.org/10.11646/zootaxa.4290.3.11
Daday, E.von. (1905) Untersuchungen über die Süsswasser-Mikrofauna Paraguays. Zoologica, Stuttgart, 18 (44), 1–374.
Elmoor-Loureiro, L.M.A. (1997) Manual de identificação dos Cladóceros Límnicos do Brasil. Universa, Brasília, 156 pp.
Elmoor-Loureiro, L.M.A. (2007) Phytophilous cladocerans (Crustacea, Anamopoda, Ctenopoda) from Paranã River Valley, Goiás, Brazil. Revista Brasileira de Zoologia, 24 (2), 344–352.
https://doi.org/10.1590/S0101-81752007000200012
Hollwedel, W., Kotov, A.A. & Brandorff, G.-O. (2003) Cladocera (Crustacea: Branchiopoda) from the Pantanal (Brazil). Arthropoda Selecta, 12 (2), 67–93.
Hudec, I. (2010) Anomopoda, Ctenopoda, Haplopoda, Onychopoda (Crustacea: Branchiopoda). VEDA, Bratislava, 496 pp.
Iwata, H. & Ukai, Y. (2002) SHAPE: a computer program package for quantitative evaluation of biological shapes based on elliptic Fourier descriptors. Journal of Heredity,
93, 384–385.
https://doi.org/10.1093/jhered/93.5.384
Kotov, A.A. (2000) Springer Link, Analysis of Kozhowia Vasiljeva & Smirnov, 1969 (Chydoridae, Anomopoda, Branchiopoda), with a description of Parakozhowia n. gen. Hydrobiologia, 437, 17-56.
https://doi.org/10.1023/A:1026507529975
Kotov, A.A. (2009) A revision of Leydigia Kurz, 1875 (Anomopoda, Cladocera, Branchiopoda), and subgneric differentiation within the genus. Zootaxa, 2082 (1), 3–84.
https://doi.org/10.11646/zootaxa.2082.1.1
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.
https://doi.org/10.1023/A:1004187007890
Kotov, A.A., Forró, L., Korovchinsky, N.M. & Petrusek, A. (2013) World checklist of freshwater Cladocera species. World Wide Web electronic publication. Available from: http://fada.biodiversity.be/group/show/17 (accessed 22 August 2019)
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), 1–66.
https://doi.org/10.11646/zootaxa.2430.1.1
Neretina A.N., Garibian P.G., Sinev A.Y. & Kotov A.A. (2018) 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/10.1080/00222933.2017.1411987
Smirnov, N.N. (1996) Cladocera: the Chydorinae and Sayciinae (Chydoridae) of the world. SPB Academic Publishing, Amsterdam, 197 pp.
Sinev, A.Y. (2016a) Key for identification of Cladocera of the subfamily Aloninae (Anomopoda: Chydoridae) from South-East Asia. Zootaxa, 4200 (4), 451‑486.
https://doi.org/10.11646/zootaxa.4200.4.1
Sinev, A.Y. (2016b) Alona kotovi sp. nov., a new species of Aloninae (Cladocera: Anomopoda: Chydoridae) from South Vietnam. Zootaxa, 3475 (1), 45–54.
https://doi.org/10.11646/zootaxa.3475.1.4
Sousa, F.D.R. & Elmoor-Loureiro, L.M.A. (2008) Cladóceros fitófilos (Crustacea, Branchiopoda) do Parque Nacional das Emas, estado de Goiás. Biota Neotropica, 8 (1), 159–166.
https://doi.org/10.1590/S1676-06032008000100019
Sousa, F.D.R & Elmoor-Loureiro, L.M.A. (2019) Identification key for the Brazilian genera and species of Aloninae (Crustacea, Branchiopoda, Anomopoda, Chydoridae). Papeis Avulsos de Zoologia, 59, e20195924.
https://doi.org/10.11606/1807-0205/2019.59.24
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), 2247–2270.
https://doi.org/10.1080/00222933.2017.1358773
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, 50, 2727–2768.
https://doi.org/10.1080/00222933.2016.1208302
Sousa, 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.
https://doi.org/10.3897/zookeys.586.8209
Van Damme, K. (2016) Endemism and long distance dispersal in the waterfleas of Easter Island. Zootaxa, 4139 (3), 221–232.
https://doi.org/10.11646/zootaxa.4154.3.2
Van Damme, K. & Dumont, H.J. (2010) Cladocerans of the Lençóis Maranheses (NE-Brazil): faunal composition and a reappraisal of Sars’ Method. Brazilian Journal of Biology, 70, 755–779.
https://doi.org/10.1590/S1519-69842010000400008
Van Damme, K. & Dumont, H.J. (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., 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/s10750-008-9607-6
Van de Velde, I., Dumont, H.J. & Grootaert, P. (1978) Report on a collection of Cladocera from Mexico and Guatemala. Archiv für Hydrobiologie, 83 (3), 391–404.