WLeptothecata
WAglaophenia
WAglaopheniidae
WAir fern
WCampanulariidae
WClytia gregaria
WClytia hemisphaerica
WConica (suborder)
WCorhiza
WCryptolaria
WGattya
WHaleciidae
WHalecium
WHalecium halecinum
WHalecium muricatum
WHalopterididae
WKirchenpaueriidae
WMacrorhynchia
WMacrorhynchia filamentosa
WObelia
WObelia longissima
WPhialella zappai
WPlumularia
WPlumulariidae
WPlumularioidea
WTima formosa