A new species of Erinaceusyllis (Annelida: Syllidae) discovered at a wood-fall in the eastern Clarion-Clipperton zone, central Pacific ocean

Nilsson, Christian L. ORCID: https://orcid.org/0009-0005-6356-2152; Wiklund, Helena; Glover, Adrian G.; Bribiesca-Contreras, Guadalupe; Dahlgren, Thomas G.. 2024 A new species of Erinaceusyllis (Annelida: Syllidae) discovered at a wood-fall in the eastern Clarion-Clipperton zone, central Pacific ocean. Deep Sea Research Part I: Oceanographic Research Papers, 214, 104415. 1, pp. 10.1016/j.dsr.2024.104415

Before downloading, please read NORA policies.

[thumbnail of 1-s2.0-S0967063724001857-main.pdf]

Preview

Text
© 2024 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
1-s2.0-S0967063724001857-main.pdf - Published Version
Available under License Creative Commons Attribution 4.0.
Download (8MB) | Preview

Official URL: https://doi.org/10.1016/j.dsr.2024.104415

Abstract/Summary

In the deep sea, organic falls provide temporary localized enrichments of organic matter to the otherwise nutrient-poor abyssal seafloor. Areas where organic falls land become ephemeral patches of increased biodiversity. Often rich in opportunistic species which are tolerant to the sulfidic environment formed from anaerobic breakdown of organic matter. On a wood-fall at abyssal depths in the eastern Clarion-Clipperton Zone, the novel species Erinaceusyllis simonlledoi (Annelida: Syllidae) was discovered in high abundance. This study entails the first description of a novel syllid species found in high density on a naturally occurring organic fall. Phylogenetic position was investigated using three genetic markers (16S, 18S, COI) and morphology was studied through light- and scanning electron microscopy. Genetic data and morphological analysis supported placement in the syllid genus Erinaceusyllis. Distinguishing features were lack of eyes, dorsal brooding of one egg per egg-bearing segment, lack of visible papillae across the body, incomplete fusion of palps, bidentate chaetae, as well as pyriform antennae and tentacular cirri. Erinaceusyllis simonlledoi sp. nov. is highly similar to a species found on hydrothermal vents belonging to the closely related genus Sphaerosyllis. The similarity between the two species, as well as findings of unspecified Sphaerosyllis species in various types of sulfidic habitats evoke questions of a possible syllid lineage adapted to sulfidic environments.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/j.dsr.2024.104415
ISSN:	09670637
Additional Keywords:	Erinaceusyllis, Sphaerosyllis, Wood-falls, Sulfidic habitats, Clarion-Clipperton zone, Abyssal zone
Date made live:	09 Jan 2025 13:55 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/538677

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1016/j.dsr.2024.104415

ISSN:

09670637

Additional Keywords:

Erinaceusyllis, Sphaerosyllis, Wood-falls, Sulfidic habitats, Clarion-Clipperton zone, Abyssal zone

Date made live:

09 Jan 2025 13:55 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/538677