Zootaxa 2839: 1–46 (2011) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2011 · Magnolia Press ISSN 1175-5334 (online edition) Sponges from Clipperton Island, East Pacific ROB W.M. VAN SOEST1* , KIRSTIE L. KAISER2 & ROBERT VAN SYOC3 1Netherlands Centre for Biodiversity Research, Zoological Museum of Amsterdam, P.O.Box 94766, 1090 GT Amsterdam, The Nether- lands. E-mail: [email protected] 2Santa Barbara Museum of Natural History, 2559 Puesta del Sol Road, Santa Barbara, California 93105, USA. E-mail: [email protected] 3California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA 94118, USA. E-mail: [email protected] Table of contents Abstract . 3 Introduction . 3 Material and methods . 4 Systematics . 5 Class Demospongiae . 5 Order Homosclerophorida . 5 Family Plakinidae . 5 Genus Plakinastrella Schulze, 1880 . 5 Plakinastrella clippertonensis n. sp.. 5 Genus Oscarella Vosmaer,1887. 8 Oscarella carmela Muricy & Pearse, 2004. 8 Order Hadromerida . 9 Family Hemiasterellidae . 9 Genus Paratimea Hallmann, 1917 . 9 Paratimea globastrella n. sp. 9 Family Timeidae . 11 Genus Timea Gray, 1867 . 11 Timea clippertoni n. sp. 11 Family Tethyidae . 14 Genus Tethya Lamarck, 1814 . 14 Tethya sarai Desqueyroux-Faúndez & Van Soest, 1997 . 14 Order Poecilosclerida . 17 Suborder Microcionina . 17 Family Microcionidae . 17 Subfamily Microcioninae . 17 Genus Clathria Schmidt, 1862 . 17 Subgenus Thalysias Duchassaing & Michelotti, 1864 . 17 Clathria (Thalysias) hermicola n. sp. 17 Suborder Myxillina . 20 Family Coelosphaeridae . 20 Genus Coelosphaera Thomson, 1873 . 20 Subgenus Coelosphaera Thomson, 1873 . 20 ?Coelosphaera (Coelosphaera) sp. 20 Family Hymedesmiidae . 22 Genus Hymedesmia Bowerbank, 1864 . 22 Subgenus Hymedesmia Bowerbank, 1864 . 22 Hymedesmia (Hymedesmia) prostrata Thiele, 1903. 22 Family Tedaniidae . 24 Genus Tedania Gray, 1867. 24 Subgenus Tedania Gray, 1867 . 24 Tedania (Tedania) strongylostylota Kennedy & Hooper, 2000. 24 Suborder Mycalina . ..