Franklin Co., Alabama
Size: 30 cm across the plate. The largest specimen is 2.5 cm across
This is a new discovery that was made by myself and a group of friends. You can read about it in this 2019 JP publication.
"Revision of the unusual Carboniferous ophiuroid Cholaster (Echinodermata) and remarks on skeletal differentiation within the Asterozoa."
Daniel B. Blake and Merlynd K. Nestell