Hidden diversity within the Diopatra cuprea complex (Annelida: Onuphidae): morphological and genetics analyses reveal four new species in the south-west Atlantic

Autor(es)

Seixas, Victor Correa ^{[1, 2]} ; Steiner, Tatiana Menchini ^[3] ; Sole-Cava, Antonio Mateo ^[4] ; Zacagnini Amaral, Antonia Cecilia ^[3] ; Paiva, Paulo Cesar ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Rio De Janeiro, Programa Posgrad Ecol, Rio De Janeiro, RJ - Brazil

^[2] Univ Fed Rio de Janeiro, Inst Biol, Dept Zool, CCS Bloco A, BR-21941590 Rio De Janeiro, RJ - Brazil

^[3] Univ Estadual Campinas, Inst Biol, Dept Biol Anim, Campinas, SP - Brazil

^[4] Univ Fed Rio de Janeiro, Inst Biol, Dept Genet, Rio De Janeiro, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY; v. 191, n. 3, p. 637-671, MAR 2021.
• Citações Web of Science: 0

Resumo

Diopatra is the most species-rich genus of Onuphidae with about 60 species. Although 14 species have been reported for Brazil, the cosmopolitan D. cuprea is the most commonly reported from the area, including populations with a large morphological diversity. To better elucidate this species complex, we use morphological and molecular data, and reveal a hidden diversity. Thus, we describe four new species (D. hannelorae sp. nov., D. marinae sp. nov., D. pectiniconicum sp. nov. and D. victoriae sp. nov.) and discuss their geographical and bathymetrical distributions. None of the analysed specimens could be identified as D. cuprea based on available sequences. New taxonomic characters were highlighted, including jaw morphology, which was the determinant factor to differentiate D. marinae from D. victoriae. Phylogenetic analysis indicates three (COI and ND4) or four (concatenated) lineages, because D. marinae was not always reciprocally monophyletic. Sequence-based species delimitation also indicates three to five species, depending on the method used. Inter- and intragroup genetic divergence and haplotype network analysis supported four species. The divergence time among species indicates that Pleistocene sea-level fluctuations and the Vitoria-Trindade chain limited the gene flow between northern and southern populations and contributed to the emergence of species, mainly in the case of D. marinae and D. victoriae. (AU)

• Processo FAPESP: 98/07090-3 - Biodiversidade marinha bêntica no Estado de São Paulo
• Beneficiário: Antonia Cecília Zacagnini Amaral
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 18/10313-0 - Consolidação de coleções científicas de invertebrados marinhos: estratégias para conservação da biodiversidade
• Beneficiário: Antonia Cecília Zacagnini Amaral
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático