Unformatted text preview: Corals were much restricted after the Devonian crisis and the large reefs of the Devonian were replaced with smaller reefs known as patch reefs. The role of corals in these new reefs was much reduced from what it had been in earlier times. Crinoids were also important contributors to the building of these small reefs, as were blastoids, a similar group of echinoderms. Forminiferans , a group of unicellular protozoans that date from the Cambrian, developed a new series of forms with calcareous and porcellaneous tests (foram "shells" are technically known as tests). The fusulinids were a large group of foraminiferans that reached sizes of several centimeters in length. The fusulinids were very important during the Permian before their extinction at that period's close....
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- Fall '10
- Biology, Carboniferous, Devonian, Early Carboniferous, Late Devonian Mass, Fenestrate bryozoans, armored Devonian fish