The Unique Amphipoda and Tanaidacea (Crustacea: Peracarida) Associated With the Brown Algae Dictyota sp. From the Oceanic Trindade Island, Southwestern Atlantic, With Biogeographic and Phylogenetic Insights

Frontiers in Marine Science

Silvana G. L. Siqueira¹  Fosca P. P. Leite¹  Juliana L. Segadilha²  Tammy Iwasa-Arai³ 

[1] Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil;Laboratório de Carcinologia, Departamento de Invertebrados, National Museum, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil;Programa de Pós-Graduação em Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil;

关键词: dispersal;    event-based biogeography;    cladistics;    morphology;    taxonomy;   

DOI  :  10.3389/fmars.2021.641236

来源: DOAJ

【 摘 要 】

Oceanic islands are known by their unique evolutionary histories and high endemicity caused by isolation. This is the first survey on the biodiversity of Peracarida from Trindade Island, a volcanic island located about 1,160 km off the Brazilian coast, with the first reports of Tanaidacea from the island and the description of Synapseudes isis sp. nov. and three new species of Amphipoda (Ampithoe thaixsp. nov., Elasmopus gabrielisp. nov., and Eusiroides lucaisp. nov.). The results of the phylogenetic analysis of Synapseudes based on morphological characters and its biogeography through the Bayesian Binary MCMC analysis (BBM) suggested an Indo-Pacific origin for the genus. Finally, the biodiversity of Trindade Island is compared to that of the Abrolhos Archipelago, the closest islands from the coast on the continental shelf, suggesting a high endemicity of Peracarida, corresponding to 44% of Amphipoda and 50% of Tanaidacea species in the island of Trindade.

【 授权许可】

Unknown