Search the Community

Taxonomy from Lowney 1980. Diagnosis from Lowney 1980, p. 949: "The skull roof is usually ornamented faintly at the lateral borders of the dermopterotics and frontals; the center of the skull roof appears smooth. The maxilla narrows under the orbit and tapers sharply at the anterior end (Text-fig. 3; PI. 2, fig. 4). The nasals are Y-shaped, with a long posterior process. The suboperculum is equal to or larger than the operculum. The lateral line scales remain tall and serrate all the way to the caudal (P1. 1, fig. 5). There are often a few vertebral centra visible anteriorly (Text-fig. 3B). The position of fins is as follows: dorsal-15, anal13, pelvic-6, caudal-21. The depth of the lateral line scales is three and one half times the width." Identified 2015 by TFF member dshamilla. Line drawing from Lowney 1980, p. 943: Microhaplolepis serrata, scale = 2 mm. References: Newberry, J.S. (1856) Description of several new genera and species of fossil fishes, from the Carboniferous strata of Ohio. Proceedings of the Academy of Natural Sciences of Philadelphia 8: 96–100. Westoll, T. S. (1944) The Haplolepidae, a new family of late Carboniferous bony fishes : a study in taxonomy and evolution. Bulletin of the AMNH ; v. 83, article 1. Lowney, K. (1980) A Revision of the Family Haplolepidae (Actinopterygii, Paleonisciformes) from Linton, Ohio ( Westphalian D, Pennsylvanian). Journal of Paleontology, Vol. 54, No. 5, pp. 942-953. Hook, Robert W and Ferm, J. C. (1985) A depositional model for the Linton tetrapod assemblage (Westphalian D, Upper Carboniferous) and its paleoenvironmental significance. Phil. Trans. R. Soc. Lond. B 311, 101-109. Hook Robert W. and Baird, Donald (1986) The Diamond Coal Mine of Linton, Ohio, and its Pennsylvanian-age vertebrates. Journal of Vertebrate Paleontology, Vol. 6, 1986, pp. 174-190. Hook, Robert W. and Baird, Donald (1988): An Overview of the Upper Carboniferous Fossil Deposit at Linton, Ohio. The Ohio Journal of Science. v88, n1, 55-60. dshamilla, May 19, 2015: Identifying Paleoniscoid Fishes From Linton Ohio, Upper Pennsylvanian - General Fossil Discussion - The Fossil Forum

Line drawing: References: Hook, Robert W. and Baird, Donald (1988): An Overview of the Upper Carboniferous Fossil Deposit at Linton, Ohio. The Ohio Journal of Science. v88, n1 (March, 1988), 55-60. R.W. Hook and J. C. Ferm (1985) A depositional model for the Linton tetrapod assemblage (Westphalian D, Upper Carboniferous) and its paleoenvironmental significance. Phil. Trans. R. Soc. Lond. B 311, 101-109 (1985) Robert W. Hook and Donald Baird (1986) The Diamond Coal Mine of Linton, Ohio, and its Pennsylvanian-age vertebrates. Journal of Vertebrate Paleontology, Vol. 6, 1986, pp. 174-190

Taxonomy from Lowney, 1980. Diagnosis for the genus Parahaplolepis from Lowney 1980, p. 944: "The body is relatively long and slender, with a ventral lateral line. There are no separate dermopterotics in the skull roof. The anterior pit line of the skull roof extends onto the frontal from the parietal. The posterior margin of the skull roof is deeply embayed for the reception of the extrascapulars and posttemporals, and the latter two pairs of bones meet in the midline. The skull roof ornament consists of broad raised rugae or low tubercles. The maxilla (in the one species where it is known) has a rather tall posterior expansion. There is a small quadratojugal present behind the maxilla." Diagnosis for the species P. tuberculata from Lowney 1980, p. 945: "The frontals are covered with a randomly arranged pattern of broad rugae and smaller coarse tubercles. Their anterior border is usually indented slightly for the reception of the postrostral, and the posterior margin is more or less straight across. The latter characters serve to distinguish P. tuberculata from the other known members of the genus, P. anglica and P. canadensis, in which the posterior margins are obliquely directed anteriorly (Westoll, 1944; Baird, 1978). The fin positions are as follows: dorsal-23, anal-18, pelvic-8, caudal-27. The anterior lateral line scales are serrate on the hinder margin, but these serrations disappear at the level of the dorsal fin. The depth of the lateral line scales is approximately four times the width." Line drawing from Westoll 1944, p. 30: Identified by TFF member dshamilla. References; Hook, Robert W. and Baird, Donald (1988): An Overview of the Upper Carboniferous Fossil Deposit at Linton, Ohio. The Ohio Journal of Science. v88, n1 (March, 1988), 55-60. R.W. Hook and J. C. Ferm (1985) A depositional model for the Linton tetrapod assemblage (Westphalian D, Upper Carboniferous) and its paleoenvironmental significance. Phil. Trans. R. Soc. Lond. B 311, 101-109 (1985) Hook, Robert W. and Baird, Donald (1986) The Diamond Coal Mine of Linton, Ohio, and its Pennsylvanian-age vertebrates. Journal of Vertebrate Paleontology, Vol. 6, 1986, pp. 174-190. Westoll, T. Stanley (1944) The Haplolepidae, a new family of late Carboniferous bony fishes : a study in taxonomy and evolution. Bulletin of the AMNH ; v. 83, article 1 Lowney, K. (1980) A Revision of the Family Haplolepidae (Actinopterygii, Paleonisciformes) from Linton, Ohio ( Westphalian D, Pennsylvanian). Journal of Paleontology, Vol. 54, No. 5, pp. 942-953. dshamilla: Identifying Linton Paleoniscoid Fish

Line drawing: References: Hook, Robert W. and Baird, Donald (1988): An Overview of the Upper Carboniferous Fossil Deposit at Linton, Ohio. The Ohio Journal of Science. v88, n1 (March, 1988), 55-60. R.W. Hook and J. C. Ferm (1985) A depositional model for the Linton tetrapod assemblage (Westphalian D, Upper Carboniferous) and its paleoenvironmental significance. Phil. Trans. R. Soc. Lond. B 311, 101-109 (1985). Robert W. Hook and Donald Baird (1986) The Diamond Coal Mine of Linton, Ohio, and its Pennsylvanian-age vertebrates. Journal of Vertebrate Paleontology, Vol. 6, 1986, pp. 174-190.