Bored and Burrowed: An Unusual Echinoid Steinkern from the Type Maastrichtian (Upper Cretaceous, Belgium)

Autor:	Luc Goffings, Stephen K. Donovan, John W.M. Jagt
Rok vydání:	2014
Předmět:	Paleontology Taphonomy Planolites Ambulacral Paleoecology Ambulacrum Test (biology) Rogerella Geology Cretaceous
Zdroj:	Ichnos. 21:261-265
ISSN:	1563-5236 1042-0940
DOI:	10.1080/10420940.2014.955097
Popis:	A test of the irregular echinoid Hemipneustes striatoradiatus (Leske) was dissolved in dilute hydrochloric acid to expose the flint steinkern. This revealed slender, string-like borings that were mainly limited to ambulacra (Talpina isp. cf. T. canna (Price)); less common pouch-like borings limited to part of one ambulacrum only (Rogerella isp. cf. R. pattei (Saint Seine)); and slender, sinuous to contorted burrows, Planolites montanus Richter. Ingress to the test (borers) and sediment infill (burrowers) was presumably through the ambulacral pore pairs of the dead test. Borings and burrows were probably not coeval. Such infestations of fossil echinoids may be locally common, but their identification is controlled by the difficulty of seeing features of both the test and the infill.
Databáze:	OpenAIRE
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