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Free Content Observations on Setal Morphology in the Phyllodocidae (Polychaeta: Annelida), with Some Taxonomic Considerations

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With few exceptions (principally within the genera Eteone, Hesionura and Paranaitis), the setae of the Phyllodocidae have been regarded as being so homogenous as to lack taxonomic value. Descriptions and figures in the literature have been both imprecise and confusing. An attempt has here been made to carry out systematic observations of the setae in several different genera, using both differential interference contrast light microscopy and scanning electron microscopy. The results indicate that subtle but important differences do exist, and may be very helpful in a more precise delimitation of genera within the Phyllodocidae. These conclusions are compared to remarks in the literature in an attempt to bring some order to setal observations. Potentially valuable characters seem to be present; along these lines, the need for further research is pointed out, above all a thorough revision of the genus Eulalia.

Document Type: Research Article

Publication date: March 1, 1991

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