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Berkeley, Edith; Berkeley, Cyril. (1948). Annelida. Polychaeta Errantia. Canadian Pacific Fauna. Fisheries Research Board of Canada, Toronto. 9b(1): 1-100.
49169
Berkeley, Edith; Berkeley, Cyril
1948
Annelida. Polychaeta Errantia.
Canadian Pacific Fauna. Fisheries Research Board of Canada, Toronto
9b(1): 1-100
Publication
World Polychaeta Database (WPolyDb)
[Introduction as:]
The Polychaeta constitute a large group of the Chaetopoda characterised by the presence of highly-developed parapodia carrying numerous setae, a definite head frequently with eyes and tentacles and other appendages, and often cirri and branchiae on various segments. The sexes are distinct. They may be microscopic or anything up to to several feet in length. The large majority of species are marine. They may be free-living, passing their lives crawling on, or buried in, the bottom material, or swimming, or sedentary, living in tubes or borrows. They are found between tide-marks and at all depths and on every kind of bottom. Many species are cosmopolitan.
Classification is mainly based on external characters, but size, markings, and coloration vary enormously in many species and can be used only with extreme caution. The group is divided for convenience into two sections, Errantia and Sedentaria. The present paper deals with the Errantia which have all the segments approximately similar with the exception of the few around the mouth and the last segment, or pygidium. The Errantia are usually free-living.
The application of the keys given is limited to the families, genera, and species dealt with herein.
A number of the illustrations are taken, or adapted, from Fauvel's "Polychètes Errantes" in the "Faune de France", others from various papers which are referred to in the text. We wish to ackowledge our indebtedness to the authors of all these publications.
Pacific, North East (Warm + cold temperate (boreal))
Systematics, Taxonomy
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