|
''Spongilla'' is a genus of freshwater sponges in the family Spongillidae found in lakes and slow streams. Sponges of the genus ''Spongilla'' attach themselves to rocks and logs and filter the water for various small aquatic organisms such as protozoans, bacteria, and other free-floating pond life. Unlike marine sponges, freshwater sponges are exposed to far more adverse and variable environmental conditions, so they have developed gemmules as a means of dormancy. When exposed to excessively cold or otherwise harsh situations, the sponges form these gemmules, which are highly resistant "buds" that can live dormant after the mother sponge has died. When conditions improve, the gemmules "germinate" and a new sponge is born. ''Spongilla'' was used by John Hogg in the 19th century to attempt to justify a fourth kingdom of life. ''Species'' * ''Spongilla alba'' * ''Spongilla arctica'' * ''Spongilla aspinosa'' * ''Spongilla benguelensis'' * ''Spongilla cenota'' * ''Spongilla chaohuensis'' * ''Spongilla dawson'' * ''Spongilla friabilis'' * ''Spongilla gutenbergiana'' * ''Spongilla helvetica'' * ''Spongilla inarmata'' * ''Spongilla jiujiangensis'' * ''Spongilla lacustris'' * ''Spongilla permixta'' * ''Spongilla prespensis'' * ''Spongilla sarasinorum'' * ''Spongilla shikaribensis'' * ''Spongilla stankovici'' * ''Spongilla wagneri'' ==References== * Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 19, 2007 at http://animaldiversity.org. * * 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「Spongilla」の詳細全文を読む スポンサード リンク
|