A phylogenetic analysis of the genus Eunice (Eunicidae, polychaete, Annelida) |
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Authors: | JOANA ZANOL KRISTIAN FAUCHALD PAULO C PAIVA |
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Institution: | Pós-Graduação em Zoologia, Museu Nacional/UFRJ, Quinta da Boa Vista s/n°, São Cristovão, Rio de Janeiro, RJ 20940–040, Brazil; Department of Invertebrate Zoology, NMNH, Smithsonian Institution, PO Box 37012, NHB MRC 0163, Washington, DC 20013–7012, USA; Departamento de Zoologia, Insituto de Biologia, Universidade Federal do Rio de Janeiro, CCS, Bloco A, Sala A0-104, Ilha do Fundão, Rio de Janeiro, RJ 2240–590, Brazil |
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Abstract: | Species of Eunice are distributed worldwide, inhabiting soft and hard marine bottoms. Some of these species play significant roles in coral reef communities and others are commercially important. Eunice is the largest and most poorly defined genus in Eunicidae. It has traditionally been subdivided in taxonomically informal groups based on the colour and dentition of subacicular hooks, and branchial distribution. The monophyly of Eunice and of its informal subgroups is tested here using cladistic analyses of 24 ingroup species based on morphological data. In the phylogenetic hypothesis resulting from the present analyses Eunice and its subgroups are paraphyletic; the genus may be divided in at least two monophyletic groups, Eunice s.s. and Leodice , but several species do not fall inside these two groups. Most of the traditional characters used in the taxonomy of Eunice are homoplasies; however, characters used for the first time in this study, such as certain jaw characters and characters derived from a close examination of chaetal variation along the body, are promising sources of phylogenetic signal. © 2007 The Linnean Society of London, Zoological Journal of the Linnean Society , 2007, 150 , 413–434. |
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Keywords: | branchial distribution Eunicida jaw Leodice mandible maxillae phylogeny subacicular hooks |
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