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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: Biometry of Enallaster Texanus (A Cretaceous Echinoid)
By
University of Texas, Master of Arts thesis, 112 p., 30 diags., 1965
Three statistical studies of Enallaster texanus (Roemer), an echinoid from
the Central Texas Walnut Formation, disclose geographic size variations. They
indicate that the volume of invertebrates should receive special treatment.
Partial correlations demonstrate proportional size and functional relationships
between coronal segments. Anterior ambulacral pores exhibit an environmentally influenced doubling
pattern. Ambulacral measures are more closely correlated to each other than to
coronal measures. Right posterior ambulacral measures are highly correlated
with other ambulacral measures, but at lower o-levels coronal features are
correlated with ambulacral measures through the right anterior ambulacrum.. End_of_Record - Last_Page 17--------