Reply To: TX Echinoid ID? Homepage › Forums › What Is It? › TX Echinoid ID? › Reply To: TX Echinoid ID? April 25, 2020 at 7:45 pm #68211 Jack KallmeyerModerator @theodore-gray Frankly, they all look alike to me. However, I suggest you obtain a copy of Collector’s Guide to Texas Cretaceous Echinoids by William W Morgan, Schiffer publishing, 2016. He’s got all of them covered.