Zoological Studies

Vol. 61, 2022

(update: 2022.5.6)

A New Species of Elpidium (Crustacea: Ostracoda: Limnocytheridae) from Brazil and a Morphological Phylogenetic Proposal for the Genus

Julia S. Pereira1,*, Carlos E. F. Rocha2, Ricardo L. Pinto3, and Marcio B. DASilva1

1Universidade Federal da Paraíba (UFPB), Centro de Ciências Exatas e da Natureza, Departamento de Zoologia, Campus I, Castelo Branco, CEP 58051-900, João Pessoa/PB, Brasil. *Correspondence: Email: juliaunbio@gmail.com (Pereira).
E-mail: 1940@uol.com.br (DASilva)
2Universidade de São Paulo, Instituto de Biociências, Departamento de Zoologia, Rua do Matão, trav. 14, n°. 101, CEP 05508-090, São Paulo/SP, Brasil. Email: cefrocha@usp.br (Rocha)
3Universidade de Brasília, Instituto de Geociências, Laboratório de Micropaleontologia, ICC-Ala Central, Subsolo ASS339/10, Campus Universitário Darcy Ribeiro, Asa Norte, CEP 70910-900, Brasília/DF, Brasil. Email: rlpinto@gmail.com (Pinto)

Received 23 October 2021 / Accepted 13 April 2022
Communicated by Ryuji Machida

Elpidium species exclusively inhabiting confined and temporary environments, such as those of tank-bromeliads, are a source of interesting and diverse studies as taxonomic, evolutionary or ecological, just to name a few. However, despite of its great diversity either in species number or in possibilities for study, this genus (as occurs with other phytotelm members) has been poorly studied. In the last years however, description of Elpidium species increased from six before 2013 to 11 presently. This study is an effort to keep uncovering its great diversity and to go further in order to deeply understand the genus Elpidium. In this sense, here we describe one more species for the genus, Elpidium litoreum sp. nov. and propose a phylogenetic reconstruction of it, based on morphological characters. Our results point to the monophyly of Elpidium and puts Intrepidocythere ibipora as its sister-group. Although the phylogeny revealed some interesting relations, it also exposed some incongruities that ultimately demonstrate how superficial the current knowledge about the genus is. All these questions are discussed in detail. We see this work as at the same time an effort towards a better understanding of Elpidium and a stimulus to other researches to turn their attention to the historically neglected phytotelmata community.

Key words: Limnocytheridae, Taxonomy, Evolution, Bromeliad fauna, Microcrustaceans.

Citation: Pereira JS, Rocha CEF, Pinto RL, DASilva MB. 2022. A new species of Elpidium (Crustacea: Ostracoda: Limnocytheridae) from Brazil and a morphological phylogenetic proposal for the genus. Zool Stud 61:27.

Supplementary materials: Table S1 | Table S2 | Table S3