Project 3996: A. W. Bronson, A. Pradel, J. S. Denton, J. G. Maisey. 2024. A new operculate symmoriiform chondrichthyan from the Late Mississippian Fayetteville Shale (Arkansas, United States). Geodiversitas. 46 (4):101-117.
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M902539
† Cosmoselachus
ventral view of specimen with hi...