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Gross morphology of the brain of pilargid polychaetes : taxonomic and systematic implications. American Museum novitates ; no. 2992

The gross morphology of the brains of representative species of the pilargid genera Ancistro-syllis, Cabira, Litocorsa, Parandalia, Pilargis, Si-gambra, and Synelmis is described and compared. Results suggest brain morphology may provide useful taxonomic and systematic characters within the Pilargidae. Results of a cladistic analysis are presented for selected genera and species groups based on traditional morphological characters and gross brain morphology. Sister-group relationships are discussed from these results, as well as implications for the definitions of Sigambra, Sy-nelmis, and Litocorsa, and the status of the sub-families Sigambrinae and Synelminae.