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These plates show up in the echinoid marker bed of Unit 2, Lower Member, Glen Rose Formation, Trinity Group (Albian) of Comal County, Texas. They were brought to my attention by JohnJ of the FF and I sent images to Andrew Smith at the BNHM. Smith confirmed/identified them as being in the FAMILY Echinothuriidae. Subsequently Bill Thompson named them Echinothuria mcallae after Linda McCall who had placed specimens in the Non-vertebrate Lab Collection at the University of Texas. Note: there are no known associations of these plates that come anywhere close to a complete specimen. I consider Thompson's species dubious based on incomplete material. He has also named a variety of lantern parts found in those same layers as belonging to this "species" without any actual association. And there are several other echinoids found in the same bed that could easily be the source of the lantern parts. He also has includes obvious cidarid spines under the species, again without any actual association. *the genus Echinothuria is known from the Upper Cretaceous of Great Britain.