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Fenestrate, Pinnate, and Ctenostome Bryozoans and Associated Barnacle Borings in the Wreford Megacyclothem (Lower Permian) of Kansas, Oklahoma, and Nebraska

A. J. RowellAnthony E. KrancerAugust H. SimonsenJames C. BrowerJames Frederick MillerJessica A. HarrisonLarry D. MartinLinda E. TwayP. A. JellR. Michael PetersonRex E. CrickRichard H. MaerzRobert Masterman StainforthRobert Wilson BaxterR. A. HendersonRichard A. RobisonRoger L. Kaesler

出版	University of Kansas Paleontological Institute, 1980
URL	http://books.google.com.hk/books?id=-3zjoVDlhLkC&hl=&source=gbs_api

註釋

Repetition of lithologies in the Shawnee Group of eastern Kansas provides an ideal situation for testing the dependence of such fossil types as ichthyoliths on their paleoenvironments. Ichthyoliths are abundant and diverse in the Shawnee Group and occur in horizons that are otherwise unfossiliferous.