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''Polymastia'' is a genus of sponges (Porifera) containing about 30 species. These are small to large encrusting or dome-shaped sponges with a smooth surface having many teat-shaped projections (papillae). In areas of strong wave action, this genus does not grow the teat structures, but instead grows in a corrugated form.〔Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. 2010. ''Two Oceans: a guide to the marine life of southern Africa'' ISBN 978-1-77007-772-0〕 The image depicts ''Polymastia pachymastia'', often called "aggregated nipple sponge", a species found off the coast of northern California.〔(【引用サイトリンク】title=''Polymastia pachymastia'' de Laubenfels, 1932 )〕 Its species include: *''Polymastia agglutinans'' *''Polymastia aurantium'' *''Polymastia bicolor'' *''Polymastia boletiformis''〔http://www.imagequest3d.com/cgi-bin/ImageFolio4/imageFolio.cgi?action=view&link=aquatic/porifera&image=JMG00329.jpg&img=&tt=〕 *''Polymastia bursa'' *''Polymastia conigera'' *''Polymastia crassa'' *''Polymastia craticia'' *''Polymastia croceus'' *''Polymastia echinus'' *''Polymastia fusca'' *''Polymastia granulosa''〔http://imagecache2.allposters.com/images/pic/LPIPOD/BN14818_127~Detail-of-Encrusting-Sponge-Polymastia-Granulosa-Leigh-New-Zealand-Posters.jpg〕 *''Polymastia grimaldi'' *''Polymastia hirsuta'' *''Polymastia inflata'' *''Polymastia invaginata''〔http://www.guiamarina.com/chile/01%20animals/01%20Porifera/Polymastia%20invaginata.jpg〕 *''Polymastia isidis'' *''Polymastia lorum'' *''Polymastia mamillaris'' *''Polymastia massilis'' *''Polymastia megasclera'' *''Polymastia mespilus'' *''Polymastia penicillus''〔http://www.habitas.org.uk/marinelife/species.asp?item=C2610〕 *''Polymastia pepo'' *''Polymastia rubens'' *''Polymastia spinula'' *''Polymastia tapetum'' *''Polymastia thielei'' *''Polymastia uberrima'' *''Polymastia umbraculum'' *''Polymastia zitteli'' ==References== *(North East Atlantic Taxa ) * 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Polymastia (sponge)」の詳細全文を読む スポンサード リンク
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