2003 Seattle Annual Meeting (November 25, 2003)
Paper No. 221-10
Presentation Time: 8:00 AM-12:00 PM

ESTIMATING THE COMPLETENESS AND CONGRUENCE OF THE DINOSAUR FOSSIL RECORD: PHYLOGENETIC APPROACHES

HEATHCOTE, Julia F., Earth And Planetary Sciences, Washington Univ, Campus Box 1169 - 108 Wilson Hall, 1 Brookings Drive, St Louis, MO 63130-4899, juliah@levee.wustl.edu and BARRETT, Paul M., Department of Palaeontology, The Nat History Museum, Cromwell Road, South Kensington, London, SW7 5BD

The completeness and congruence of the dinosaur fossil record was investigated quantitatively for the first time, using three existing metrics: the Stratigraphic Consistency Index, the Relative Completeness Index and the Gap Excess Ratio. Two whole-Dinosauria studies were compared, along with smaller clades within the Dinosauria. Some of these clades were found to be both complete and congruent; others were poor in both respects. The whole-Dinosauria fossil record was found to be moderately good, generally showing a low degree of completeness but a high degree of congruence with the existing phylogenies. This provides circumstantial support for the relationships described. Further fossil discoveries may alter the evolutionary relationships between taxa, and may highlight further areas of inadequacy in the stratigraphic record.

2003 Seattle Annual Meeting (November 25, 2003)
Session No. 221
Paleontology/Paleobotany (Posters) II
Washington State Convention and Trade Center: Hall 4-F
8:00 AM-12:00 PM, Wednesday, November 5, 2003

Geological Society of America Abstracts with Programs, Vol. 35, No. 6, September 2003, p. 496

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