Richness of Dendrocephalus (Branchiopoda, Anostraca) in Brazil with the description of two new species

Nicolas Rabet, Sébastien Lacau, Reinaldo L. Bozelli

Abstract


We present an overview of the morphological diversity and geographical distribution of the anostracan genus Dendrocephalus Daday, 1908, and describe two new species: D. aranai sp. nov. from Jequitinhonha in the state of Minas Gerais and D. xikrini sp. nov. from the Carajás Mountains (Serra dos Carajás) in the state of Pará. These species have important similarities to D. goiasensis Rabet & Thiéry, 1996 and D. thieryi Rabet, 2006, respectively, but differ from them and each other through a combination of characters that are essentially unique to the endopods, and frontal appendage branch 2A and branch 2D. We also partly redescribe D. carajaensis Rogers, Gomes & Vieira, 2012, which shows a particular intra-populational variability in branch 2A and 2D III of the frontal appendage, a type of polymorphism that was also recently observed in D. orientalis Rabet & Thiéry, 1996 and which must now be taken into account in taxonomy. In terms of the distribution of species of Dendrocephalus in Brazil, we suggest that several other species are probably present in the Amazonian, Cerrado and Pantanal Biomes, which remain largely unexplored. A new taxonomic key for the identification of males of the Brazilian species is provided.

Keywords


endemism; Minas Gerais; Pará; Serra dos Carajás; temporary ponds

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DOI: https://doi.org/10.5852/ejt.2018.478

References


Barros-Alves S.P., Alves D.F.R., Bolla E.A. jr, Rabet N. & Hirose G.L. 2016. Morphological review of the fresh water fairy shrimp Dendrocephalus brasiliensis Pesta, 1921 (Anostraca: Thamnocephalidae). Nauplius 24: z2016008. https://doi.org/10.1590/2358-2936e2016008

Chaves T.P., Lacau S. & Rabet N. 2011. Illustrated key to the Brazilian Dendrocephalus (Crustacea: Anostraca: Thamnocephalidae). Nauplius 19: 1–5. https://doi.org/10.1590/S0104-64972011000100001

Daday de Deés E. 1910. Monographie systématique des phyllopodes anostracés. Annales des Sciences naturelles, Zoologie Series 9: 91–489.

Felgenhauer B.E. 1987. Techniques for preparing crustaceans for scanning electron microscopy. Journal of Crustacean Biology 7: 71–76. https://doi.org/10.1163/193724087X00054

Hirose G.L., Barros-Alves S.P., Alves D.F.R., Silva I.R.S. & Bezerra M.A.O. 2015. Morphological variation in males of Dendrocephalus orientalis (Anostraca: Thamnocephalidae): implications for species identification. Zootaxa 3915: 569–580. https://doi.org/10.11646/zootaxa.3915.4.7

Lemos-de-Castro A. & Lima I.M.B. 1986. Sobre um crustáceo anostráceo reencontrado no estado do Rio Grande do Norte, Brasil (Crustacea, Branchiopoda). Anais do VII Congresso Brasileiro de Zoologia, Publicações Avulsas do Museu Nacional 66: 43–54.

Lilljeborg W. von. 1889. Diagnosen zweier Phyllopoden-Arten aus Süd-Brasilien. Abhandlungen des naturwissenschaftlichen Vereins zu Bremen 10: 424.

Lutz A. 1929. Dous phyllopodos, observados no Rio Grande do Norte. Instituto Oswaldo Cruz, Memorias del Rio de Janeiro, Supplemento 5: 3–9. https://doi.org/10.1590/S0074-02761929000200001

Margalef R. 1961. La vida en los charcos de agua dulce de Nueva Esparta (Venezuela). Memoria de la Sociedad de Ciencias Naturales La Salle 21: 75–110.

Pereira G. 1983. Taxonomic importance of the frontal appendage in the genus Dendrocephalus (Anostraca: Thamnocephalidae). Journal of Crustacean Biology 3: 293–305. https://doi.org/10.2307/1548264

Pereira G. 1984. Two new species of Dendrocephalus (Anostraca: Thamnocephalidae) from Venezuela. Journal of Crustacean Biology 4: 147–153. https://doi.org/10.2307/1547903

Pereira G. & Belk D. 1987. Three new species of Dendrocephalus (Anostraca: Thamnocephalidae) from Central and South America. Journal of Crustacean Biology 7: 572–580. https://doi.org/10.2307/1548305

Pereira G. & Ruiz L. 1995. A new species of Dendrocephalus (Anostraca, Thamnocephalidae) from Argentina. Crustaceana 68: 567–574. https://doi.org/10.1163/156854095X00818

Pesta O. 1921. Kritische Revision der Branchipodidensammlung des Wiener Naturhistorischen Staatsmuseum. Annalen des Naturhistorischen Museums in Wien 34: 80–98.

Rabet N. 2006. A new species of Brazilian Dendrocephalus (Anostraca, Thamnocephalidae). Zootaxa 1370: 49–57.

Rabet N. & Thiéry A. 1996. The neotropical genus Dendrocephalus (Crustacea: Anostraca: Thamnocephalidae) in Brazil (South America), with a description of two new species. Journal of Natural History 30: 479–503. https://doi.org/10.1080/00222939600770261

Rabet N. & Thiéry A. 1998. Branchiopoda. Anostraca and Spinicaudata: 3–10. In: Young P.S. (ed.) Catalogue of Crustacea of Brazil, 1st edition. Museu Nacional, Brazil.

Rogers C. 2006. A genus level revision of the Thamnocephalidae (Crustacea; Branchiopoda; Anostraca). Zootaxa 1260: 1–25.

Rogers D.C. & Ferreira A. 2007. A new species of Branchinecta (Crustacea: Anostraca) from Brasil. Zootaxa 1445: 27–34.

Rogers D.C. & Volcan M.V. 2016. A new Dendrocephalus (Crustacea, Anostraca, Thamnocephalidae) from Rio Grande do Sul State, Brazil. Nauplius 24: e2016014. https://doi.org/10.1590/2358-2936e2016014

Rogers D.C., Corrêa-Gomes J.P. & Vieira F. 2012. A new species of Dendrocephalus (Crustacea, Anostraca) from Serra dos Carajás (Pará State, Brasil). Zootaxa 3363: 52–58.

Weltner W. 1890. Branchipus (Chirocephalus) cervicornis, n. sp. aus Südamerika. Sitzungberichte der Gesellschaft Naturforschender Freunde zu Berlin 3: 35-41.


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