Polyphysaceae fertile caps in Hungarian Sarmatian sediments

Abstract

Three fragments of reproductive caps have been discovered in the Sarmatian limestones of Tinnye (Hungary). They are assigned to the genus Acetabularia (Polyphysaceae, formerly Acetabulariaceae). Two of these fragments are quite well preserved with nine rays each. One specimen bears distinct spines at the outer ends of long rays, whereas another one has short rays with rounded outer ends and, possibly, a partially preserved corona. The third fragment is characterized by very elongated rays containing numerous gametangia.