Original paper

Lower Pennsylvanian (Bashkirian) echinoids from the Marble Falls Formation, San Saba, Texas, USA

Thompson, Jeffrey R.; Crittenden, Jennie; Schneider, Chris L.; Bottjer, David J.


A new species of the genus Archaeocidaris is described from the Marble Falls Formation of San Saba County, Texas, USA. This species, Archaeocidaris marmorcataractensis new species is the fourth species of Archaeocidaris described from relatively complete test material from the Pennsylvanian of North America. The test, spines and elements of the Aristotle's lantern are preserved.