Vertebrate Predation on Crinoids (image) University of Chicago Medical Center Caption This is an artist's rendering of a shallow marine ecosystem during the early Carboniferous Period (359-318 million years ago). Crinoids include the camerates Dizygocrinus (under attack, bottom center, left) and the spiny Dorycrinus (bottom center, right), and the cladids Decadocrinus (bottom left) and Abrotocrinus (bottom right). Fishes include the cochliodont Deltoptychius (bottom center), the petalodont Janassa (left of center, ventral view), the chondrenchelyiform Chondrenchelys (far left), and the actinopterygian Amphicentrum (upper right). Credit Art by Robert Nicholls Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.