Journal
MOLECULAR PHYLOGENETICS AND EVOLUTION
Volume 57, Issue 1, Pages 71-83Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2010.05.027
Keywords
Phylogenetics; Bathymodiolinae; Hydrothermal vent; Cold seep; Idas; Adipicola; Organic falls; South-West Pacific; Taxon sampling; Allopatry
Funding
- Consortium National de Recherche en Genomique
- Service de Systematique Moleculaire [UMS 2700 CNRS-MNHN]
- Total Foundation
- Philippines Bureau of Fisheries and Aquatic Resources
- National Museum of the Philippines
- Lounsbery Foundation
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Bathymodiolinae mussels have been used as a biological model to better understand the evolutionary origin of faunas associated with deep-sea hydrothermal vents and cold seeps. Most studies to date, however, have sampled with a strong bias towards vent and seep species, mainly because of a lack of knowledge of closely related species from organic falls. Here we reassess the species diversity of deep-sea mussels using two genes and a large taxon sample from the South-Western Pacific. This new taxonomic framework serves as a basis for a phylogenetic investigation of their evolutionary history. We first highlight an unexpected allopatric pattern and suggest that mussels usually reported from organic falls are in fact poorly specialized with regard to their environment. This challenges the adaptive scenarios proposed to explain the diversification of the group. Second, we confirm that deep-sea mussels arose from organic falls and then colonized hydrothermal vents and cold seeps in multiple events. Overall, this study constitutes a new basis for further phylogenetic investigations and a global systematic revision of deep-sea mussels. (C) 2010 Elsevier Inc. All rights reserved.
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