Some vertebrate types (Chondrichthyes, Actinopterygii, Sarcopterygii, and Tetrapoda) from two Paleozoic Lagerstätten of Ohio, U.S.A.

Abstract

ABSTRACT The type specimens of eight Paleozoic vertebrate species from Ohio, U.S.A., originally described by J. S. Newberry and subsequently reposited in the Orton Geological Museum, are reviewed and illustrated photographically. They include four actinopterygian fish species from the Linton Konservat-Lagerstätte (Upper Freeport Coal; Carboniferous) in Jefferson County, Ohio, described in 1857 under the basionyms Mecolepis corrugatus (now Haplolepis corrugata), M. insculptus (synonymized as Parahaplolepis tuberculata), M. lineatus (now Pyritocephalus lineatus), and M. ovoideus (now Microhaplolepis ovoidea). One actinopterygian species, Eurylepis striolatus, a junior synonym of Haplolepis corrugata, was described in 1873 from the Linton deposit; and one chondrichthyan species, Orthacanthus gracilis, now replaced as Orthacanthus adamas Babcock, 2024, was first described by Newberry in 1875 from Linton. Lectotypes are designated from the syntypic series of M. insculptus and O. adamas. A tooth from the Linton Lagerstätte, originally described as a fish in 1857 under the basionym Rhizodus lancifer, is the holotype of the tetrapod (anthracosaur) Anthracosaurus lancifer. One Devonian sarcopterygian fish species, Onychodus ortoni, was described in 1889 from the Ohio Shale, Huron Shale Member, a Konservat-Lagerstätte occurring in Franklin County, Ohio.