Internal Disorder: Post-Mortem Burrows within the Tests of the Holasteroid Echinoid Echinocorys Leske (Upper Cretaceous to Paleocene)

Abstract

A test of the Lower Paleocene holasteroid echinoid Echinocorys ex. gr. scutata Leske from Göynük, Turkey, preserves a Planolites beverleyensis (Billings) burrow close to the internal surface. Identification of such a specimen is fortuitous; only where the test has broken cleanly away from the internal mould can such burrows be exposed, if present at all. A second specimen, from the Upper Cretaceous of Norfolk, England, bears a sinuous boring identified as Planolites montanus Richter.

Keywords:

• Taphonomy
• Behavior
• Arachnostega
• Planolites

ACKNOWLEDGMENTS

C. v. d. E. thanks Johan Vellekoop for supplying and collecting the specimen, and is grateful to the Department of Geology, Naturalis Biodiversity Center, for providing research facilities.