| The arms of ophiuroids and crinoids are supported by calcitic ossicles reminiscent of vertebral centra. |
| These contractions dampen the vibrations of the ossicles, thereby reducing the transmission of sound through the middle ear. |
| Most such particles are echinoderm stem ossicles, brachiopods, bryozoans or other corals. |
| The fauna is dominated by common fenestrate bryozoans and crinoid ossicles. |
| The calcitic ossicles of crinoids, as is typical of echinoderms, form an internal skeleton that provides support and protection. |
| One was in contact with the substratum, and the other formed a dome within the marginal ossicles, thus creating a body cavity. |
