File:Archaeocyatha.JPG

Summary
Various species of Cambrian sponge-like animals, known as Archaeocyathans.

Counterclockwise, from the upper left corner, Coscinoptycta convoluta, Kotuyicyathus debilis, Dokidocyathus simplicissimus, Tumuliolynthus musatovi, Beltanacyathus digitus, Fransuasaecyathus novus, Cryptoporocyathus junicanensis, Orbicyathus mongolicus, Center, Paranacyathus subartus.

(C) Stanton F. Fink