Abstract

Excellently preserved spicules of Talpaspongia clavata are described from the Talpa Member of the Clyde Formation, from a recent discovery in a deformed limestone at Kickapoo Creek. Study of photomicrographs of thin sections indicates that de Laubenfels's (1955) assignment of Talpaspongia to Class Hyalospongea on the basis of spicule complexity is not valid, and suggests return of T. clavata to Class Calcispongea, as originally assigned by R. H. King(1943) on the basis of large size of spicules and occurrence in shallow-water deposits. Family assignment (Asteractinellidae by de Laubenfels, Wewokellidae by King) should be reexamined after restudy of the genus Wewokella.

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