TY - JOUR N2 - Campyloprion Eastman, 1902 is a chondrichthyan having an arched symphyseal tooth whorl similar to that of Helicoprion Karpinsky, 1899, but less tightly coiled. The holotype of Campyloprion annectans Eastman, 1902, the type species of Campyloprion, is of unknown provenance, but is presumed to be from the Pennsylvanian of North America. Campyloprion ivanovi (Karpinsky, 1922) has been described from the Gzhelian of Russia. A partial symphyseal tooth whorl, designated as Campyloprion cf. C. ivanovi, is reported from the Missourian Tinajas Member of the Atrasado Formation of Socorro County, New Mexico, USA. Partial tooth whorls from the Virgilian Finis Shale and Jacksboro Limestone Members of the Graham Formation of northern Texas, USA, are designated as Campyloprion sp. Two partial tooth whorls from the Gzhelian of Russia that were previously referred to C. ivanovi are designated as Campyloprion cf. C. annectans. The age of Toxoprion lecontei (Dean, 1898), from Nevada, USA, is corrected from the Carboniferous to the early Permian. An alternative interpretation of the holotype of T. lecontei is presented, resulting in a reversal of its anterior-to-posterior orientation. The genera Helicoprion, Campyloprion, and Shaktauites Tchuvashov, 2001 can be distinguished by their different spiral angles. L1 - http://journals.pan.pl/Content/108911/PDF-MASTER/09_Itano.pdf L2 - http://journals.pan.pl/Content/108911 PY - 2018 IS - No 3 EP - 419 KW - Carboniferous KW - Permian KW - Eugeneodontiformes KW - Helicoprionidae KW - Edestoidea KW - Chondrichthyes KW - Geometric morphometrics A1 - Itano Wayne M. A1 - Lucas Spencer G. PB - Komitet Nauk Geologicznych PAN PB - WydziaƂ Geologii UW VL - vol. 68 DA - 2018.10.01 T1 - A revision of Campyloprion Eastman, 1902 (Chondrichthyes, Helicoprionidae), including new occurrences from the Upper Pennsylvanian of New Mexico and Texas, USA SP - 403 UR - http://journals.pan.pl/dlibra/publication/edition/108911 T2 - Acta Geologica Polonica ER -