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Phylogenetics and evolution of Capitata (Cnidaria: Hydrozoa), and the systematics of Corynidae

2009; Wiley; Volume: 39; Issue: 3 Linguagem: Inglês

10.1111/j.1463-6409.2009.00419.x

1463-6409

Annalise M. Nawrocki, Peter Schuchert, Paulyn Cartwright,

Coral and Marine Ecosystems Studies

Zoologica ScriptaVolume 39, Issue 3 p. 290-304 Phylogenetics and evolution of Capitata (Cnidaria: Hydrozoa), and the systematics of Corynidae Annalise M. Nawrocki, Annalise M. NawrockiSearch for more papers by this authorPeter Schuchert, Peter SchuchertSearch for more papers by this authorPaulyn Cartwright, Paulyn CartwrightSearch for more papers by this author Annalise M. Nawrocki, Annalise M. NawrockiSearch for more papers by this authorPeter Schuchert, Peter SchuchertSearch for more papers by this authorPaulyn Cartwright, Paulyn CartwrightSearch for more papers by this author First published: 14 April 2010 https://doi.org/10.1111/j.1463-6409.2009.00419.xCitations: 319 Annalise M. Nawrocki, Department of Ecology and Evolutionary Biology, The University of Kansas, 1200 Sunnyside Avenue, Haworth Hall, Room 7002, Lawrence, KS, 66045, USA. E-mail: [email protected] Peter Schuchert, Muséum d’Histoire Naturelle, 1 Route de Malagnou, CH-1211, Geneva, Switzerland. E-mail: [email protected] Paulyn Cartwright, Department of Ecology and Evolutionary Biology, The University of Kansas, 1200 Sunnyside Avenue, Haworth Hall, Room 7016, Lawrence, KS, 66045, USA. E-mail: [email protected] Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Nawrocki, A. M., Schuchert, P. & Cartwright, P. (2009). Phylogenetics and evolution of Capitata (Cnidaria: Hydrozoa), and the systematics of Corynidae.—Zoologica Scripta, 39, 290–304. Generic- and family level classifications in Hydrozoa have been historically problematic due to limited morphological characters for phylogenetic analyses and thus taxonomy, as well as disagreement over the relative importance of polyp vs. medusa characters. Within the recently redefined suborder Capitata (Cnidaria: Hydrozoa: Hydroidolina), which includes 15 families and almost 200 valid species, family level relationships based on morphology alone have proven elusive, and there exist numerous conflicting proposals for the relationships of component species. Relationships within the speciose capitate family Corynidae also remain uncertain, for similar reasons. Here, we combine mitochondrial 16S, and nuclear 18S and 28S sequences from capitate hydrozoans representing 12 of the 15 valid capitate families, to examine family level relationships within Capitata. We further sample densely within Corynidae to investigate the validity of several generic-level classification schemes that rely heavily on the presence/absence of a medusa, a character that has been questioned for its utility in generic-level classification. We recover largely congruent tree topologies from all three markers, with 28S and the combined dataset providing the most resolution. Our study confirms the monophyly of the redefined Capitata, and provides resolution for family level relationships of most sampled families within the suborder. These analyses reveal Corynidae as paraphyletic and suggest that the limits of the family have been underestimated. Our results contradict all available generic-level classification schemes for Corynidae. As classification schemes for this family have been largely based on reproductive characters such as the presence/absence of a medusa, our results suggest that these are not valid generic-level characters for the clade. We suggest a new taxonomic structure for the lineage that includes all members of the newly redefined Corynidae, based on molecular and morphological synapomorphies for recovered clades within the group. Citing Literature Supporting Information Appendix S1 Proposal for revised diagnoses of the family Corynidae and some of its genera. Please note: Wiley-Blackwell are not responsible for the content or functionality of any supporting materials supplied by the authors. Any queries (other than missing material) should be directed to the corresponding author for the article. Filename Description ZSC_419_sm_Appendix.doc29 KB Supporting info item Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article. Volume39, Issue3May 2010Pages 290-304 RelatedInformation