Bennetticarpus yezoites sp. nov. (Bennettitales) from the Upper Cretaceous of Hokkaido, Japan

概要

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Recently many plant taxa have been described from the marine Upper Yezo Group (Coniacian-Santonian). These plant fossils are preserved as permineralized debris in calcareous nodules together with various marine animals. A single bennettitalean specimen was collected from the Upper Yezo Group. It consists of a receptacle, with numerous fertile (seminiferous) and sterile (interseminal) scales. Although the specimen is fragmented, its anatomical features are well preserved. This paper provides a description of a new reproductive organ belonging to Bennettitales. As its affinity to Williamsoniaceae or Cycadeoidaceae and their allies is uncertain, we provisionally place our specimen in the form-genus Bennetticarpus and describe B. yezoites sp. nov. Comparison of Bennetticarpus yezoites with known bennettitalean taxa in other regions is given briefly.
日本古生物学会の論文
1998-06-30