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High diversity of frenulates (Polychaeta: Siboglinidae) in the Gulf of Cadiz mud volcanoes: A DNA taxonomy analysis
Hilario, A.; Johnson, S.B.; Cunha, M.R.; Vrijenhoek, R.C. (2010). High diversity of frenulates (Polychaeta: Siboglinidae) in the Gulf of Cadiz mud volcanoes: A DNA taxonomy analysis. Deep-Sea Res. Pt. A: Oceanogr. Res. Pap. A: Oceanogr. Res. Pap 57(1): 143-150. dx.doi.org/10.1016/j.dsr.2009.10.004
In: Deep Sea Research, Part A. Oceanographic Research Papers. Pergamon Press: Oxford. ISSN 0198-0149, more
Peer reviewed article

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Keywords
    Biodiversity; DNA; Taxonomy; Volcanoes; Frenulatea [WoRMS]; Siboglinidae Caullery, 1914 [WoRMS]; Marine

Authors  Top | Datasets 
  • Hilario, A.
  • Johnson, S.B.
  • Cunha, M.R.
  • Vrijenhoek, R.C.

Abstract
    Frenulates are the most poorly known members of the family Siboglinidae (Polychaeta: Canalipalpata). These thread-like worms occur in reducing marine sediments worldwide, but they are often overlooked in benthic samples or too poorly preserved for adequate taxonomic evaluations. We report on a remarkable diversity of frenulates that were recently sampled from 13 mud volcanoes (350–3902 m deep) in the Gulf of Cadiz, off southern Iberia. Sampled with benthic coring devices, the bodies of these long tubiculous worms were often broken or incomplete, making them difficult to identify morphologically. Consequently, we employed DNA taxonomic methods to assess their diversity. Mitochondrial cytochrome-c-oxidase subunit 1 (COI) sequences distinguished 15 evolutionary lineages inhabiting the Gulf of Cadiz. Only four of the lineages could be assigned to currently recognized Atlantic species; the remaining 11 may be new to science. This remarkable diversity of frenulates in a small geographical region is unprecedented and is hypothesized to result from environmental heterogeneity associated with the bathymetric and geochemical settings of these mud volcanoes.

Datasets (2)
  • Chemosynthetic macrofauna of the Gulf of Cadiz collected during various cruises between 2000 and 2008 and processed by Uaveiro, more
  • Macrofauna of the Gulf of Cadiz collected during 3 cruises between 2004 and 2006 and processed by Uaveiro, more

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