Morphological, molecular and phylogenetic characterization of a new Chloeia (Annelida: Amphinomidae) from a pockmark field

Author(s)

Barroso, Romulo ^[1] ; Kudenov, Jerry D. ^[2] ; Shimabukuro, Mauricio ^{[3, 4]} ; Carrerette, Orlemir ^[3] ; Sumida, Paulo Y. G. ^[3] ; Paiva, Paulo C. ^[5] ; Seixas, Victor C. ^{[5, 6, 7]}

Affiliation

^[1] Univ Fed Bahia, Inst Biol, Lab Annelida, Salvador, BA - Brazil

^[2] Univ Alaska Anchorage, Dept Biol Sci, 3211 Providence Dr, Anchorage, AK 99508 - USA

^[3] Univ Sao Paulo, Inst Oceanog, Lab Ecol & Evolucao Mar Profundo LAMP, Pca Oceanog 191, BR-05508120 Sao Paulo, SP - Brazil

^[4] Inst Francais Rech Exploitat La Mer REM EEP, Ctr Brest, Lab Environm Profond, 1625 Route St Anne, F-29280 Plouzane, Finistere - France

^[5] Univ Fed Rio de Janeiro, Inst Biol, Dept Zool, Lab Polychaeta, CCS Bloco A, BR-21941590 Rio De Janeiro, RJ - Brazil

^[6] Univ Fed Rio de Janeiro, Inst Biol, Programa Posgrad Ecol, Rio De Janeiro, RJ - Brazil

^[7] Univ Fed Fluminense, Inst Biol, Dept Biol Marinha, Rua Prof Marcos Waldemar de Freitas Reis, Bloco M, BR-24210201 Niteroi, RJ - Brazil

• Document type: Journal article
• Source: DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS; v. 171, MAY 2021.
• Web of Science Citations: 0

Abstract

Pockmarks are crater-like depressions in seabed sediments commonly found along continental margins and generally associated with episodic fluid seepage. In this study, we describe a new species of Chloeia (Amphinomidae) gathered from a pockmark field, located off the southeastern Brazilian continental margin (similar to 750 m depth), SW Atlantic. The complete mitochondrial genome is given, together with a multi-gene phylogenetic analysis including our new species and other amphinomids. The new species is similar to Chloeia bimaculata, C. violacea and C. kudenovi in having the longest neuropodial cirri on the second chaetiger. Chloeia pocicola sp. nov. differs from these congeners mainly by the combination of its dorsal pigmentation pattern, eyes, notopodial cirri, and neuropodial chaetae. Our phylogenetic hypothesis suggests Chloeia as a sister group of Archinome, which departs from previous studies, that instead suggests the clade Chloeia-Notopygos. This study increases our knowledge on the biodiversity of deep-sea pockmark environments, and contribute to the systematics of Amphinomidae, which is generally well represented in shallow waters, but also occurs in deep waters, including chemosynthetic environments. (AU)

• FAPESP's process: 14/08266-2 - Continental slope morphological features on the SE Brazilian Margin: active tectonics versus modern oceanographic conditions
• Grantee: Michel Michaelovitch de Mahiques
• Support Opportunities: Regular Research Grants