Abstract
The rudists are a group of aberrant bivalve molluscs known from the Upper Jurassic to end Cretaceous of the Tethyan region. Although paleobiologically fascinating, rudists are seldom discussed in detail in textbooks. This paper explains the principal features of rudist morphology and paleobiology. Recent significant advances in rudist research include the interpretation of mantle feeding in radiolitids, associated with limited shell gaping and reduced mantle cavity volume; feeding associated with radial canals in the free valves of hippuritids; recognition of the migration of rudists across broad oceans by island-hopping of larvae; a suggestion that rudists may not have been constructors of reefs; and the refinement of patterns of evolution and extinction.
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