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Showing results for tags 'Echinocystid'.
We visited the Wilson Clay Pit in Coleman County, Texas last April. My dad stumbled across this little guy, which, according to the Color Guide of Pennsylvanian Fossils of North Texas (McKinzie and McLeod) is Pronechinus sp., a rare carboniferous echinoid known only from the Wilson Clay Pit and Diyarbakir Province in Turkey. Here is a link to the specimen found in Turkey. Notice the same double pores on the ambulacral plates as seen in the specimen we found. Scale is in centimeters...