The first record of Mesoturrilites (Ammonoidea) from Hokkaido : Studies of the Cretaceous ammonites from Hokkaido and Sakhalin-LXXXIII

Abstract

Several small specimens collected years ago by A. I. from a locality in the Soeushinai area of Hokkaido are now identified as Mesoturrilites boerssumensis (Schluter, 1876). The species has been reported from the Lower Cenomanian of western and central Europe and western Asia. Our material is also referred to the Lower Cenomanian on the biostratigraphic evidence. This may be the first record of Mesoturrilites in the northern Pacific region.