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Systematics, phylogeny and biogeography
RESEARCH ARTICLE

A tale of two tubeworms: taxonomy of vestimentiferans (Annelida: Siboglinidae) from the Mid-Cayman Spreading Centre

Magdalena N. Georgieva https://orcid.org/0000-0002-1129-0571 A B , Nadezhda N. Rimskaya-Korsakova https://orcid.org/0000-0001-9576-2435 C * , Varvara I. Krolenko https://orcid.org/0000-0002-9265-302X C , Cindy Lee Van Dover https://orcid.org/0000-0001-9845-8391 D , Diva J. Amon https://orcid.org/0000-0003-3044-107X E F , Jonathan T. Copley https://orcid.org/0000-0003-3333-4325 G , Sophie Plouviez https://orcid.org/0000-0002-5211-9922 H , Bernard Ball https://orcid.org/0000-0002-9817-0993 I , Helena Wiklund https://orcid.org/0000-0002-8252-3504 A J K and Adrian G. Glover https://orcid.org/0000-0002-9489-074X A
+ Author Affiliations
- Author Affiliations

A Life Sciences Department, Natural History Museum, London, UK.

B Univ. Brest, CNRS, Ifremer, UMR6197 Biologie et Ecologie des Ecosystèmes marins Profonds, Plouzané, France.

C Department of Invertebrate Zoology, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russian Federation.

D Division of Marine Science and Conservation, Nicholas School of the Environment, Duke University Marine Laboratory, Beaufort, NC, USA.

E SpeSeas, D’Abadie, Trinidad and Tobago.

F Marine Science Institute, University of California, Santa Barbara, Santa Barbara, CA, USA.

G Ocean & Earth Science, University of Southampton, Southampton, UK.

H Department of Biology, University of Louisiana at Lafayette, Lafayette, LA, USA.

I School of Biology & Environmental Science, University College Dublin, Dublin, Ireland.

J Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden.

K Gothenburg Global Biodiversity Centre, Gothenburg, Sweden.

* Correspondence to: nadezdarkorsakova@gmail.com

Handling Editor: Greg Rouse

Invertebrate Systematics 37(3) 167-191 https://doi.org/10.1071/IS22047
Submitted: 7 September 2022  Accepted: 9 February 2023   Published: 22 March 2023

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing.

Abstract

The vestimentiferan tubeworm genera Lamellibrachia and Escarpia inhabit deep-sea chemosynthesis-based ecosystems, such as seeps, hydrothermal vents and organic falls, and have wide distributions across the Pacific, Atlantic and Indian Oceans. In 2010–2012 during initial explorations of hydrothermal vents of the Mid-Cayman Spreading Centre (MCSC), both genera were found to co-occur at the Von Damm Vent Field (VDVF), a site characterised by diffuse flow, therefore resembling a ‘hydrothermal seep’. Here, we erect two new vestimentiferan tubeworm species from the VDVF, Lamellibrachia judigobini sp. nov. and Escarpia tritentaculata sp. nov. Lamellibrachia judigobini sp. nov. differs genetically and morphologically from other Lamellibrachia species, and has a range that extends across the Gulf of Mexico, MCSC, off Trinidad and Tobago, and Barbados, and also across both vents and seeps and 964–3304-m water depth. Escarpia tritentaculata sp. nov. is distinguished from other Escarpia species primarily based on morphology and is known only from vents of the MCSC at 2300-m depth. This study highlights the incredible habitat flexibility of a single Lamellibrachia species and the genus Escarpia, and historic biogeographic connections to the eastern Pacific for L. judigobini sp. nov. and the eastern Atlantic for E. tritentaculata sp. nov.

ZooBank: urn:lsid:zoobank.org:pub:D9F72BD4-FDE1-4C0A-B84B-A08D06F2A981

Keywords: 16S DNA, 18S DNA, biodiversity, Caribbean, chemosynthesis, COI, cold seep, Escarpia, Lamellibrachia, pinnules, plaque papillae, tentacles.


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