Revision of Hydroides Gunnerus, 1768 (Polychaeta: Serpulidae) from the Western Atlantic region

A taxonomic revision of the Hydroides species (Polychaeta: Serpulidae) from the Western Atlantic Region is presented. Twenty-six taxa are described, including a comparison between four species with ‘winged ’ verticil spines: Hydroides alatalater-alis, H. elegantulus, H. floridanus and H. spongicola, between two forms of the H. mongeslopezi complex, and between two forms of the H. brachyacanthus complex. Three widespread species are recorded: H. dianthus, H. diramphus and H. elegans. Five new forms are recorded, including one with 7-9 thoracic chaetigers. Three species are newly described: H. lambecki n. sp., H. simi-loides n. sp. and H. salazarvallejoi n. sp. Seven specific names areplaced into synonymy: H. abbreviatus Krøyer [in] Mörch, H