Caprinuloidea rudists are locally abundant and widespread in Lower Cretaceous (Albian Stage) Edwards Formation in Texas. Landward of the shelf margin on the shallow marine Comanche Shelf rudists built circular and elongate bioherms with coarse-grained flank deposits. | Ontogeny and funtional morphology of a lower cretaceous carpinid rudist (bivalvia, hippuritoida)