New genera and species from the Equatorial Pacific provide phylogenetic insights into deep-sea Polynoidae (Annelida).

Bonifacio, Paulo and Menot, Lenaick (2019) New genera and species from the Equatorial Pacific provide phylogenetic insights into deep-sea Polynoidae (Annelida). Open Access Zoological Journal of the Linnean Society, 185 (3). pp. 555-635. DOI 10.1093/zoolinnean/zly063.

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Polynoidae contains ~900 species within 18 subfamilies, some of them restricted to the deep sea. Macellicephalinae is the most diverse among these deep-sea subfamilies. In the abyssal Equatorial Pacific Ocean, the biodiversity of benthic communities is at stake in the Clarion-Clipperton Fracture Zone (CCFZ) owing to increased industrial interest in polymetallic nodules. The records of polychaetes in this region are scarce. Data gathered during the JPI Oceans cruise SO239 made a significant contribution to fill this gap, with five different localities sampled between 4000 and 5000 m depth. Benthic samples collected using an epibenthic sledge or a remotely operated vehicle resulted in a large collection of polynoids. The aims of this study are as follows: (1) to describe new species of deep-sea polynoids using morphology and molecular data (COI, 16S and 18S); and (2) to evaluate the monophyly of Macellicephalinae. Based on molecular and morphological phylogenetic analyses, ten subfamilies are synonymized with Macellicephalinae in order to create a homogeneous clade determined by the absence of lateral antennae. Within this clade, the Anantennata clade was well supported, being determined by the absence of a median antenna. Furthermore, 17 new species and four new genera are described, highlighting the high diversity hidden in the deep. A taxonomic key for the 37 valid genera of the subfamily Macellicephalinae is provided.

Document Type: Article
Keywords: deep sea, identification key, molecular systematics, morphology, new genera, new species, phylogeny, Polychaeta
Refereed: Yes
Open Access Journal?: No
Publisher: Oxford University Press
Projects: JPIO-MiningImpact, MIDAS
Date Deposited: 07 Dec 2018 08:17
Last Modified: 02 Jan 2020 12:10

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