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Morphometric study of the genus Ancyrodelloides (Lower Devonian, conodonts), central Nevada

Published online by Cambridge University Press:  19 May 2016

Michael A. Murphy  and
M. Kemal Cebecioglu
Michael A. Murphy
Affiliation:
Department of Earth Sciences, University of California, Riverside 92521
M. Kemal Cebecioglu
Affiliation:
Department of Earth Sciences, University of California, Riverside 92521
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Abstract

This paper presents a morphometric study of the conodont genus Ancyrodelloides. It is one of a series of such papers whose goal is to increase the precision of correlation within the Lower Devonian by refining the taxonomic basis of its biostratigraphic units. Ancyrodelloides species are confined to the delta Zone and may be used to divide it into three parts. Morphometrics verify the species rank of A. eleanorae, A. limbacarinatus, A. trigonicus, and A. transitans. Ancyrodelloides delta and A. omus are retained as species on qualitative grounds, but need larger samples for statistical evaluation. Ancyrodelloides asymmetricus and A. kutscheri are classified as varieties, but lack adequate samples.

Type
Research Article
Information
Journal of Paleontology , Volume 61 , Issue 3 , May 1987 , pp. 583 - 594
Copyright
Copyright © The Paleontological Society 

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References

Barnett, S. 1971. Biometric determination of the evolution of Spathognathodus remscheidensis: a method of precise intrabasinal time correlations in the northern Appalachians. Journal of Paleontology, 45:274–300.Google Scholar
Berry, W. B. N., and Murphy, M. A. 1975. Silurian and Devonian graptolites of central Nevada. University of California Publications in Geological Sciences, 110, 109 p.Google Scholar
Eldredge, N., and Gould, S. J. 1972. Punctuated equilibria: an alternative to phyletic gradualism, p. 82–115. In Schopf, T. J. M. (ed.), Models in Paleobiology. Freeman-Cooper, San Francisco, California.Google Scholar
Klapper, G., and Murphy, M. A. 1975. Silurian–Lower Devonian conodont sequence in the Roberts Mountains Formation of central Nevada. University of California Publications in Geological Sciences, 111, 62 p.Google Scholar
Klapper, G., and Murphy, M. A. 1980. Conodont zonal species from the delta and pesavis Zones (Lower Devonian) in central Nevada. Neues Jahrbuch für Geologie und Paläeontologie, Monatshefte, 1980 H8, p. 490–504.Google Scholar
Lane, H. R., and Ormiston, A. R. 1979. Siluro–Devonian biostratigraphy of the Salmontrout River area, east-central Alaska. Geologica et Palaeontologica, 13:39–96.Google Scholar
Murphy, M. A. 1987 [in press]. The possibility of a Lower Devonian equal-increment time scale based on lineages of Lower Devonian conodonts, p. 287–296. In Austin, R. L. (ed.), Conodonts Investigative Techniques and Applications. Ellis Horwood Ltd, Chichester, England.Google Scholar
Murphy, M. A. and Berry, W. B. N. 1983. Early Devonian conodont-graptolite collation and correlations with brachiopod and coral zones, central Nevada. American Association of Petroleum Geologists Bulletin, 67:371–379.Google Scholar
Murphy, M. A. and Cebecioglu, M. K. 1984. Icriodus steinachensis and I. claudiae lineages (Devonian conodonts). Journal of Paleontology, 58:1399–1411.Google Scholar
Murphy, M. A. and Matti, J. C. 1983 [imprint 1982]. Lower Devonian conodonts (hesperius–kindlei Zones), central Nevada. University of California Publications in Geological Sciences, 123, 82 p.Google Scholar
Shaw, A. B. 1964. Time in Stratigraphy. McGraw-Hill, New York, 365 p.Google Scholar
Simpson, G. G. 1961. Principles of Animal Taxonomy. Columbia University Press, New York, 247 p.CrossRefGoogle Scholar