Microhaplolepis serrata (Newberry), 1856

By oilshale

• February 14, 2022

Taxonomy

Kingdom: Animalia
Phylum: Chordata
Class: Actinopteri Cope 1871
Order: Palaeonisciformes Hay, 1929
Family: Haplolepidae Westoll, 1944
Genus: Microhaplolepis
Species: Microhaplolepis serrata
Author Citation (Newberry), 1856

Geological Time Scale

Eon: Phanerozoic
Era: Paleozoic
Period: Carboniferous
Sub Period: Pennsylvanian
Epoch: Middle
International Age: Moscovian (late)

Stratigraphy

Allegheny Formation
Upper Freeport coal bed

Provenance

Collector: T. Bastelberger
Date Collected: 06/01/1982
Acquired by: Field Collection

Dimensions

Length: 2 cm

Location

Diamond Mine dump
Jefferson County
Ohio
United States

• allegheny formation
• carboniferous;
• linton
• microhaplolepis
• moscovian
• ohio
• tff-oilshale-ch516

Comments

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