Marine & Environmental Sciences Faculty Articles

Title

Phylogeny‐Based Species Delimitations and the Evolution of Host Associations in Symbiotic Zoanthids (Anthozoa, Zoanthidea) of the Wider Caribbean Region

Document Type

Article

Publication Date

6-2009

Publication Title

Zoological Journal of the Linnean Society

Keywords

Biogeography, Cryptic species, Demospongia, Hydrozoa, ITS ribosomal, RNA, Specificity, Symbiosis, Zoanthidea

ISSN

0024-4082

Volume

156

Issue/No.

2

First Page

223

Last Page

238

Abstract

Zoanthids are marine cnidarians with simple morphologies that challenge our ability to delineate species. Phylogenetic analyses of internal transcribed spacer (ITS) sequences are consistent with six morphologically described species from the wider Caribbean region, and reveal four additional species that were not previously recognized. Histological examinations of unidentified species reveal cryptic Isozoanthus and Edwardsiidae (Actiniaria) species. Observations of zoanthids in situ reveal geographic distributions that range from regional to trans‐Atlantic. ITS and 16S data are consistent with hypotheses of paraphyly in some higher taxa of zoanthids; however, the clades of zoanthids recovered in both analyses can largely be defined by their host associations, thereby supporting phylogenetic conservatism in zoanthid–host association evolution. The single clear example of a zoanthid switching hosts was accompanied by a compensatory loss of endosymbiosis, which maintained the match in photosynthetic symbioses between zoanthids and sponge hosts.

Comments

©2009 The Linnean Society of London

Additional Comments

Ministry of Science, Education and Sports of the Republic of Croatia grant #: 119-0362975-1226; NSF grant #: 0550599

ORCID ID

0000-0002-6485-6823

ResearcherID

M-7702-2013

DOI

10.1111/j.1096-3642.2008.00513.x

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Peer Reviewed

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