Look at the pattern of spicules. Is this a siliceous (Hexactinellida) or calcareous (Calcarea) sponge? 2. Specimen #142. Astreospongia is an important index fossil for the Silurian and Devonian. Find ...
Calyptrella tenuissima, a glass sponge fossil that died on the seabed 80 million years ago Coeloptychium agaricoides, a hexactinellid (six rayed spiculed) fossil sponge originating from the Cretaceous ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback