Here is a nice cystoid of the species Holocystites scutellatus from the silurian Osgood Shale of the US State Indiana. The fossil shows well on the matrix. | |||
Location: | Napoleon, Indiana, USA | ||
Size of Fossil : | about 38 x 24 mm | ||
Age: | Silurian , Niagarian, Osgood Shale Formation |