Astylospongia praemorsa sponge fossil found in the Silurian Period Waldron Shale of Indiana. Illustrations used in the posting are from Indiana Geological Survey #11 of 1881 and taken from Plate 2 Figures 7-8.
Monday, December 26, 2011
Astylospongia praemorsa Sponge
Astylospongia praemorsa sponge fossil found in the Silurian Period Waldron Shale of Indiana. Illustrations used in the posting are from Indiana Geological Survey #11 of 1881 and taken from Plate 2 Figures 7-8.