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The diversity, distribution, and taxonomic history of the Brazilian Tanaidacea (Crustacea)

Published online by Cambridge University Press:  20 September 2024

Juliana L. Segadilha*
Affiliation:
Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA), Gerência Executiva do Ibama Santarém/PA, Avenida Tapajós, n° 2.267, Laguinho, Cep: 68010-000 – Santarém, Pará, Brazil
Catarina L. Araújo-Silva
Affiliation:
Departamento de Zoologia, Centro de Biociências, Universidade Federal de Pernambuco, Programa de Pós-Graduação em Biologia Animal, Av. Prof. Moraes Rego s/n, Recife, Pernambuco, 50670-420, Brazil
*
Corresponding author: Juliana L. Segadilha; Email: [email protected]

Abstract

Tanaidaceans have a worldwide distribution, with 36 families, 316 genera, and 1575 extant species described. This study aimed to compile the resulting taxonomic information for Brazilian waters obtained to produce the available online catalogue Taxonomic Catalogue of the Brazilian Fauna. Results show 63 species described for Brazilian waters: 30 Apseudomorpha and 33 Tanaidomorpha, distributed in 46 genera and 18 families. For apseudomorphan, Kalliapseudidae is the most diverse family (12.7%), followed by Apseudidae and Parapseudidae (9.5% each). For tanaidomorphan, Typhlotanaidae is the most diverse (15.9%) followed by Leptocheliidae (9.5%) and Tanaididae (7.9%). In Brazilian waters, more than 60% of Tanaidacea species are distributed in shallow waters (42 species; 63.6%), including continental areas, and about 1/3 are recorded from deep-sea (24 species; 36.4%). Southeast Region of Brazil holds most records with 46 occurrences, followed by the Northeast Region with 19 occurrences. Our results highlight the increasing number of publications and new Brazilian tanaids species in the last 15 years, and this is directly correlated to where specialists in alpha-taxonomy, systematics/phylogeny, and ecology are based in. Our current dataset also indicates an important aspect regarding the lack of taxonomic experts of Tanaidacea worldwide, but especially in Brazil. This study gives an overview of all the information that may help elucidate future research on the taxonomic diversity of tanaidaceans in Brazil, thus it is expected that this may encourage further studies and specialists for the group.

Type
Research Article
Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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