Summary[edit] Description: English: Fossil of sponge Amphitelion. Took the picture at Naturalis, Leiden. Date: 26 August 2013, 14:29:10. Source: Own work. Author: Ghedoghedo.
Summary[edit] Description: English: Peronidella, a calcisponge from the Matmor Formation (Callovian) of southern Israel; osculum view. Date: 29 July 2015, 21:02:25. Source: Own work. Author: Wilson44691.
Summary[edit] Description: English: eroded from chalk cliff on the Isle of Wight. Date: 3 January 2014, 23:32:43. Source: Own work. Author: Daniel King.
Summary[edit] Description: English: Peronidella, a calcisponge from the Matmor Formation (Callovian) of southern Israel. Date: 29 July 2015, 20:57:43. Source: Own work. Author: Wilson44691.
Summary[edit] Description: English: Reconstruction of the calcareous sponge, Petaloptyon danei, of the Middle Cambrian Burgess Shale laggerstatte. Date: 16 August 2017, 04:56:53. Source: Own work. Author: Apokryltaros.