Chaetopterid tubes from vent and seep sites: Implications for fossil record and evolutionary history of vent and seep annelids

Kiel, S. and Dando, P. R. (2009) Chaetopterid tubes from vent and seep sites: Implications for fossil record and evolutionary history of vent and seep annelids Acta Palaeontologica Polonica, 54 (3). pp. 443-448. DOI 10.4202/app.2009.0022.

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Abstract

Vestimentiferan tube worms living at deep-sea hydrothermal vents and cold seeps have been considered as a clade with a long and continuing evolutionary history in these ecosystems. Whereas the fossil record appears to support this view, molecular age estimates do not. The two main features that are used to identify vestimentiferan tubes in the fossil record are longitudinal ridges on the tube's surface and a tube wall constructed of multiple layers. It is shown here that chaetopterid tubes from modem vents and seeps-as well as a number of fossil tubes from shallow-water environments-also show these two features. This calls for a more cautious interpretation of tubular fossils from ancient vent and seep deposits. We suggest that: current estimates for a relatively young evolutionary age based on molecular clock methods may be more reliable than the inferences of ancient "vestimentiferans" based on putative fossils of these worms; not all of these putative fossils actually belong to this group; and that tubes from fossil seeps should be investigated for chitinous remains to substantiate claims of their potential siboglinid affinities.

Document Type: Article
Keywords: Vestimentifera Pogonophora Siboglinidae Chaetopteridae tube worms chemosynthetic ecosystems hot vents cold seeps deep-sea vent hydrocarbon-seep methane seeps pogonophora communities polychaeta california pacific worms fauna
Research affiliation: Kiel University
Refereed: No
DOI etc.: 10.4202/app.2009.0022
ISSN: 0567-7920
Date Deposited: 22 Dec 2011 05:32
Last Modified: 08 Oct 2012 10:10
URI: http://eprints.uni-kiel.de/id/eprint/15790

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