Ophiura graysonensis   CLASS - Asterozoa ORDER - Ophiuridae FAMILY - GENUS/SPECIES - Ophiura graysonensis ROCK UNIT - Grayson Marl AGE - Late Cretaceous LOCALITY - Tarrant County, Texas, USA Like Geocoma, this is a brittle-star. This specimen contains several individuals, two of which are shown here. The graceful arms of these individuals are bent and contorted, and the specimens are partially broken. Echinoderms do not preserve well, as they break down within hours after death. PRI 43698