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

  • Nicolas Rabet Sorbonne Université, UPMC Univ Paris 06, CNRS, Unité Biologie des organismes et écosystèmes aquatiques (BOREA, UMR 7208), Muséum national d’Histoire naturelle, Université Pierre et Marie Curie, Université de Caen Normandie, Université des Antilles, CNRS, IRD, CP26 75231, 43 rue Cuvier, Paris Cedex 05
  • Sébastien Lacau Universidade Estadual do Sudoeste da Bahia, Laboratório de Biossistemática Animal, BR 415, km 03.45700-000 Itapetinga, Bahia
  • Reinaldo L. Bozelli Universidade Federal do Rio de Janeiro, Laboratório de Limnologia, Departamento de Ecologia, Instituto de Biologia, CCS, Av. Carlos Chagas Filho, 373, CEP 21941-590 Rio de Janeiro, RJ
DOI: https://doi.org/10.5852/ejt.2018.478
Keywords: endemism, Minas Gerais, Pará, Serra dos Carajás, temporary ponds

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.

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Published
2018-11-22
How to Cite
Rabet, N., Lacau, S., & Bozelli, R. L. (2018). Richness of Dendrocephalus (Branchiopoda, Anostraca) in Brazil with the description of two new species. European Journal of Taxonomy, (478). https://doi.org/10.5852/ejt.2018.478
Issue
No. 478 (2018): Richness of Dendrocephalus (Branchiopoda, Anostraca) in Brazil with the description of two new species
Section
Zoology
Copyright (c) 2018 Nicolas Rabet, Sébastien Lacau, Reinaldo L. Bozelli

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