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New data from a detailed study of the type and topotype collections of the type species of Heritschioides confirm the unique status of the genus as colonial and bearing extra septal lamellae. The associated microfossils establish its age as late Serpukhovian to early Bashkirian. The close connection of the cardinal septum to the median lamella and the axial structure points to the family Aulophyllidae. However, the inconsistent role of the protosepta in the formation of the median lamella is unique for Heritschioides. This feature and the colonial growth form allow its assignment to a separate subfamily, the Heritschioidinae Sando, 1985, which is closely related to the subfamily Aulophyllinae. So far, the subfamily Heritschioidinae is known to occur only in rocks along the western margin of North America. Jerzy Fedorowski. Institute of Geology, Adam Mickiewicz University, Maków Polnych 16, Pl-61-606, Poznań, Poland. jerzy@amu.edu.pl E. Wayne Bamber. Geological Survey of Canada (Calgary), 3303-33rd Street N. W., Calgary, Alberta T2L 2A7, Canada. wabamber@nrcan.gc.ca Calvin H. Stevens. Department of Geology, San Jose State University, San Jose, California 95192, USA. calvin.stevens@sjsu.edu

Multibody dynamics model of head and neck function in Allosaurus (Dinosauria, Theropoda)