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The earliest known (Namurian A, E1) haplolepids (Osteichthyes: Actinopterygii)

Published online by Cambridge University Press:  03 November 2011

Karen A. Lowney
Karen A. Lowney
Affiliation:
Geology Department, Royal Scottish Museum, Chambers Street, Edinburgh EH1 1JF, Scotland.
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Abstract

Two new genera and species of haplolepids (Chondrostei), Protohaplolepis scotica and Blairolepis loanheadensis, are described from the ironstones of Loanhead, Midlothian (Namurian A, E1); this represents the earliest known record of the family. Protohaplolepis scotica (= Traquair's nomen nudum “Eurylepis scoticus”) shows many features in common with Westoll's hypothetical haplolepid “common ancestor X”, and is possibly ancestral to the Haplolepis–Microhaplolepis line within the family. Blairolepis loanheadensis, known only from a skull roof, shows greater similarities to Parahaplolepis and Pyritocephalus, but differs from these genera in having separate dermopterotics and parietals. Two subfamilies, the Haplolepinae and the Parahaplolepinae, are suggested to reflect the distinct evolutionary lines within the family.

A new species, Parahaplolepis westolli, is also described from Newsham, Northumberland (Westphalian B). This species shows a close resemblance to the American species Parahaplolepis tuberculata from Linton, Ohio.

A brief discussion of the evolutionary history of the family is presented, along with a summary of its stratigraphical and geographical distribution.

Keywords

ActinopterygiiancestryBorough LeeChondrosteigeographyLoanheadNewshamstratigraphy.
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 74 , Issue 2 , 1983 , pp. 69 - 78
Copyright
Copyright © Royal Society of Edinburgh 1983

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References

Baird, D. 1962. A haplolepid fish fauna in the early Pennsylvanian of Nova Scotia. PALAEONTOLOGY 5, 22–9.Google Scholar
Baird, D. 1978. Studies on Carboniferous freshwater fishes. AM MUS NOVIT 1641, 1–22.Google Scholar
Bardack, D. 1979. Fishes of the Mazon Creek fauna. In Nitecki, M. H. (ed.) Mazon Creek fossils, 501–528. New York: Academic Press.CrossRefGoogle Scholar
Carroll, R. & Gaskill, P. 1978. The Order Microsauria. MEM AM PHILOS SOC 126, 1–211.Google Scholar
Fritsch, A. 1893. Fauna der Gaskohle und der Kalksteire der permformation Böhmens, Vol. 3 (whole vol. dated 1895), pp. 1–132, figs 189–310, plates 91–132.Google Scholar
Gardiner, B. G. 1967. Further notes on palaeoniscoid fishes, with a classification of the Chondrostei. BULL BR MUS NAT HIST (GEOL) 14, 145–206.Google Scholar
Hancock, A. & Atthey, T. 1868. Notes on the remains of some reptiles and fishes from the shales of the Northumberland coal-field. NAT HIST TRANS NORTHUMBERLAND, DURHAM, AND NEWCASTLE-UPON-TYNE 3, 66–120.Google Scholar
Henrichsen, I. C. G. 1970. A catalogue of fossil vertebrates in the Royal Scottish Museum, Edinburgh. Pt. 1: Actinopterygii. R SCOTT MUS INF SER, GEOL 1, 1–102.Google Scholar
Land, D. H. 1974. The geology of the Tynemouth district. MEM GEOL SURV U K.Google Scholar
Lowney, K. A. 1980a. A revision of the family Haplolepidae (Actinopterygii, Paleonisciformes) from Linton, Ohio (West-phalian D, Pennsylvanian). J PALEONTOL 54, 942–53.Google Scholar
Lowney, K. A. 1980b. Certain Bear Gulch (Namurian A, Montana) Actinopterygii (Osteichthyes) and a reevaluation of the evolution of the Paleozoic actinopterygians. Unpublished Ph.D. Dissertation, New York University.Google Scholar
Newberry, J. S. 1856. Description of several new genera and species of fossil fishes from the Carboniferous strata of Ohio. PROC ACAD NAT SCI PHILADELPHIA 8, 96–100.Google Scholar
Newberry, J. S. & Worthen, H. A. 1870. Description of fossil vertebrates. GEOL SURV ILLINOIS 4, 347–74.Google Scholar
Panchen, A. L. 1973. Carboniferous tetrapods. In Hallam, A. (ed.) Atlas of Paleobiogeography, 117–26. Amsterdam: Elsevier.Google Scholar
Rayner, D. 1971. Data on the environment and preservation of late Paleozoic tetrapods. PROC YORK GEOL SOC 38, 437–95.CrossRefGoogle Scholar
Traquair, R. H. 1903. On the distribution of fossil fish remains in the Carboniferous remains of the Edinburgh district. TRANS R SOC EDINBURGH 14, 687–707.Google Scholar
Tulloch, W. E. & Walton, W. 1958. The geology of the Midlothian coalfield. MEM GEOL SURV U K.Google Scholar
Westoll, T. S. 1944, The Haplolepidae, a new family of late Carboniferous bony fishes. BULL AM MUS NAT HIST 85, 1–122.Google Scholar