RUDIST TAXONOMY USING X-RAY COMPUTED TOMOGRAPHY
X-ray CT provides three-dimensional (3-D) representations of internal features of silicified caprinid bivalves from the Lower Cretaceous (Albian Stage) Edwards Formation in Texas. This technique enables the specific identification of caprinid rudists that otherwise could only be identified by sectioning the specimen. The abundant Edwards species is Caprinuloidea perfecta because it has only two rows of polygonal canals on its ventral and anterior margins. Ontogeny of these unusual gregarious bivalves is also demonstrated by means of these images.
The University of Texas, Texas Natural Science Center, Austin, TX 78705, U.S.A.
Robert W. Scott. Precision Stratigraphy Associates and University of Tulsa, 600 South College Avenue, Tulsa, OK 74104, U.S.A.
Richard A. Ketcham. The University of Texas at Austin, Jackson School of Geosciences, 1 University Station, C-1100, Austin, TX 78712-0254, U.S.A.
Jessica A. Maisano. The University of Texas at Austin, Jackson School of Geosciences, 1 University Station, C-1100, Austin, TX 78712-0254, U.S.A.
KEY WORDS: Rudists, Caprinidae, Cretaceous, Lower; X-ray, CT
PE Article Number: 10.3.13A
Copyright: Paleontological Society April 2007
Submission: 20 July 2007. Acceptance: 7 October 2007