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Is Filibranchus, Malm 1874 (Trichobranchidae: Polychaeta) A Natural Taxon?

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This paper presents a hypothesis on the phylogenetic relationships among currently known species in the genus Trichobranchus, based on a cladistic analysis of the external morphological characters, and examines the consequences of such an analysis on the validity of Filibranchus. Phylogenetic relationships of the group were studied using parsimony analysis of 14 (absent/present and multistate) coded morphological characters of 12 terminal taxa. Only one clade was identified, grouping Trichobranchus and Filibranchus. Thus, Filibranchus is considered a junior synonym of Trichobranchus and classification modified to reflect the phylogeny.

Document Type: Research Article


Affiliations: 1: Curso de Pós-Graduação em Ciências Biológicas, Zoologia, Universidade Federal do Paraná, Setor de Ciências Biológicas, Departamento de Zoologia, Caixa Postal 19020, CEP 81531-990, Curitiba, Brazil 2: Centro de Estudos do Mar, Universidade Federal do Paraná, Av. Beira Mar s/n, Caixa Postal 50002, Pontal do Sul, CEP 83255-993, Pontal do Paraná, Brazil

Publication date: 2002-01-01

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