Abstract
The deep‐water genus Halisiphonia is reviewed, based on redescriptions of all available type specimens of its species. The genus includes four valid species, H. arctica, H. galatheae, H. megalotheca, and H. nana, and one species inquirenda, H. spongicola, for which the type could not be located.
Acknowledgements
The authors wish to thank Prof. Wim Vervoort (Nationaal Natuurhistorisch Museum, Leiden, The Netherlands) for his help with the bibliography, and Dr. AM García‐Carrascosa (Universidad de Valencia, Spain) for hosting us in his laboratory for part of the studies. The project had financial support from Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP 2001/02626‐7, 2001/10677‐0, 2003/02432‐3, and 2004/09961‐4), by a research contract funded by the Ministerio de Ciencia y Tecnología and the Universidad de Valencia, Spain (Ramón y Cajal Program), a research project (CGL2004‐04684/ANT), funded by the Ministerio de Educación y Ciencia of Spain and the Fondo Europeo de Desarrollo Regional (FEDER), and support from the National Museum of Natural History, Department of Invertebrate Zoology, United States Antarctic Program funded by the National Science Foundation (OPP‐9509761). ACM and AEM also have financial support from the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq; 302596/2003‐8 and 300194/1994‐3, respectively).