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On the systematics and ecology of two new species of Provanna (Gastropoda: Provannidae) from deep-sea hydrothermal vents in the Caribbean Sea and Southern Ocean

On the systematics and ecology of two new species of Provanna (Gastropoda: Provannidae) from deep-sea hydrothermal vents in the Caribbean Sea and Southern Ocean
On the systematics and ecology of two new species of Provanna (Gastropoda: Provannidae) from deep-sea hydrothermal vents in the Caribbean Sea and Southern Ocean
The recent discovery and exploration of deep-sea hydrothermal vent fields in the Mid-Cayman Spreading Centre, Caribbean Sea (Beebe Vent Field, 4956–4972 m depth) and the East Scotia Ridge, Southern Ocean (E2 and E9 vent fields, 2394–2641 m depth) have yielded extensive collections of two new provannid species, Provanna beebei n. sp. and P. cooki n. sp. Morphological and molecular taxonomy (530 bp of the mitochondrial cytochrome c oxidase subunit I gene) confirm P. beebei n. sp. and P. cooki n. sp. as distinct species; these species are formally described, and details are provided of their distribution, habitat and species associations. Bayesian and maximum likelihood analyses support the placement of P. beebei n. sp. and P. cooki n. sp within the genus Provanna and show that these two new deep-sea species form a well-supported clade with the abyssal West Pacific P. cingulata. Provanna beebei n. sp. and P. cooki n. sp. represent the first records of Provanna from hydrothermal vents in the Caribbean Sea and Southern Ocean, respectively, and extend the known geographic range of the genus. For the first time, intraspecific phenotypic variation in size and sculpture has been reported for Provanna. At the East Scotia Ridge, shell-size frequency distributions and median shell size of P. cooki n. sp. varied significantly between the E2 and E9 vent fields, as well as between diffuse flow and high-temperature venting habitats within each field. The variation in shell sculpture in relation to habitat was also observed in P. cooki n. sp.
0260-1230
426-439
Linse, Katrin
74d7ddc0-74a1-4777-ac1d-3f39ae1935ad
Nye, Verity
e3688d01-623f-47b5-9a4c-7e49b16aa5a8
Copley, Jonathan T.
5f30e2a6-76c1-4150-9a42-dcfb8f5788ef
Chen, Chong
3faad3e1-b898-4f4b-b418-9c1736e53f95
Linse, Katrin
74d7ddc0-74a1-4777-ac1d-3f39ae1935ad
Nye, Verity
e3688d01-623f-47b5-9a4c-7e49b16aa5a8
Copley, Jonathan T.
5f30e2a6-76c1-4150-9a42-dcfb8f5788ef
Chen, Chong
3faad3e1-b898-4f4b-b418-9c1736e53f95

Linse, Katrin, Nye, Verity, Copley, Jonathan T. and Chen, Chong (2019) On the systematics and ecology of two new species of Provanna (Gastropoda: Provannidae) from deep-sea hydrothermal vents in the Caribbean Sea and Southern Ocean. Journal of Molluscan Studies, 85 (4), 426-439, [eyz024]. (doi:10.1093/mollus/eyz024).

Record type: Article

Abstract

The recent discovery and exploration of deep-sea hydrothermal vent fields in the Mid-Cayman Spreading Centre, Caribbean Sea (Beebe Vent Field, 4956–4972 m depth) and the East Scotia Ridge, Southern Ocean (E2 and E9 vent fields, 2394–2641 m depth) have yielded extensive collections of two new provannid species, Provanna beebei n. sp. and P. cooki n. sp. Morphological and molecular taxonomy (530 bp of the mitochondrial cytochrome c oxidase subunit I gene) confirm P. beebei n. sp. and P. cooki n. sp. as distinct species; these species are formally described, and details are provided of their distribution, habitat and species associations. Bayesian and maximum likelihood analyses support the placement of P. beebei n. sp. and P. cooki n. sp within the genus Provanna and show that these two new deep-sea species form a well-supported clade with the abyssal West Pacific P. cingulata. Provanna beebei n. sp. and P. cooki n. sp. represent the first records of Provanna from hydrothermal vents in the Caribbean Sea and Southern Ocean, respectively, and extend the known geographic range of the genus. For the first time, intraspecific phenotypic variation in size and sculpture has been reported for Provanna. At the East Scotia Ridge, shell-size frequency distributions and median shell size of P. cooki n. sp. varied significantly between the E2 and E9 vent fields, as well as between diffuse flow and high-temperature venting habitats within each field. The variation in shell sculpture in relation to habitat was also observed in P. cooki n. sp.

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Linse et al 2019 provannids - Accepted Manuscript
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More information

Accepted/In Press date: 3 June 2019
e-pub ahead of print date: 16 October 2019
Published date: November 2019

Identifiers

Local EPrints ID: 439663
URI: http://eprints.soton.ac.uk/id/eprint/439663
ISSN: 0260-1230
PURE UUID: e7638204-5fed-4fe1-b79e-261c0c2f76a6
ORCID for Jonathan T. Copley: ORCID iD orcid.org/0000-0003-3333-4325

Catalogue record

Date deposited: 29 Apr 2020 16:30
Last modified: 26 Nov 2021 05:55

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Contributors

Author: Katrin Linse
Author: Verity Nye
Author: Chong Chen

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