Idanthyrsus is a genus of marine polychaete worms in the family Sabellariidae with 29 recognized species.
Species Species in Idanthyrsus include:
Idanthyrsus albigenus Idanthyrsus armatopsis Idanthyrsus australiensis Idanthyrsus bicornis Idanthyrsus bihamatus Idanthyrsus boninensis Idanthyrsus cretus Idanthyrsus kornickeri Idanthyrsus luciae Idanthyrsus macropaleus Idanthyrsus manningi Idanthyrsus mexicanus Idanthyrsus nesos Idanthyrsus okinawaensis Idanthyrsus okudai Idanthyrsus pennatus Idanthyrsus saxicavus Idanthyrsus sexhamatus Idanthyrsus valentinei Idanthyrsus willora Idanthyrsus abyssalis Idanthyrsus armatus Idanthyrsus bihamata Idanthyrsus glaessneri Idanthyrsus ornamentatus Idanthyrsus pennata Idanthyrsus quadricornis Idanthyrsus regalis Idanthyrsus varians
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