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Systematics, phylogeny and biogeography
RESEARCH ARTICLE

Phylogeny, biogeography and systematics of Pacific vent, methane seep, and whale-fall Parougia (Dorvilleidae : Annelida), with eight new species

Nicole K. Yen https://orcid.org/0000-0003-0407-0973 A and Greg W. Rouse https://orcid.org/0000-0001-9036-9263 A B
+ Author Affiliations
- Author Affiliations

A Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0202, USA.

B Corresponding author. Email: grouse@ucsd.edu

Invertebrate Systematics 34(2) 200-233 https://doi.org/10.1071/IS19042
Submitted: 26 July 2019  Accepted: 16 October 2019   Published: 31 March 2020

Abstract

Dorvilleidae is a diverse group of annelids found in many marine environments and also commonly associated with chemosynthetic habitats. One dorvilleid genus, Parougia, currently has 11 described species, of which two are found at vents or seeps: Parougia wolfi and Parougia oregonensis. Eight new Parougia species are recognised and described in this study from collections in the Pacific Ocean, all from whale-falls, hydrothermal vents, or methane seeps at ~600-m depth or greater. The specimens were studied using morphology and phylogenetic analyses of DNA sequences from mitochondrial (cytochrome c oxidase subunit I, 16S rRNA, and cytochrome b) and nuclear (18S rRNA and histone 3) genes. Six sympatric Parougia spp. were found at Hydrate Ridge, Oregon, while three of the Parougia species occurred at different types of chemosynthetic habitats. Two new species were found over wide geographical and bathymetric ranges. Another dorvilleid genus, Ophryotrocha, has previously been highlighted as diversifying in the deep-sea environment. Our results document the hitherto unknown diversity of another dorvilleid genus, Parougia, at various chemosynthetic environments.

http://zoobank.org/urn:lsid:zoobank.org:pub:EC7EBBEA-2FB5-43D6-BE53-1A468B541A5C

Additional keywords: chemosynthetic environments, COI, deep sea, molecular, polychaete.


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