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The role of phyletic change in the evolution of Pseudocubus vema (Radiolaria)

Published online by Cambridge University Press:  25 May 2016

Davida E. Kellogg
Davida E. Kellogg*
Affiliation:
Department of Geology, University of Maine at Orono, Orono, Maine 04473
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Abstract

While the importance of allopatric speciation in the fossil record has long been underestimated, phyletic change within single unbranching lineages also occurs. The 50% increase in thoracic width observed in the radiolarian species Pseudocubus vema from an Antarctic deep-sea core is a clear example of a long-term phyletic trend in a continuous fossil sequence. Phyletic change in P. vema occurred at varying rates, but changes in the morphologic rate of evolution do not correspond to any obvious breaks in the fossil record such as would be indicated by missing segments of the core's magnetic stratigraphy. Variation in thoracic width, as measured by the coefficient of variation, does not depend on the morphologic rate of evolution, proportional rate of evolution, nor the amount of time required for the width to change by one standard deviation, so much as it depends on whether change was accomplished by addition or removal of extreme phenotypes to or from the population.

Type
Research Article
Information
Paleobiology , Volume 1 , Issue 4 , Fall 1975 , pp. 359 - 370
Copyright
Copyright © The Paleontological Society 

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References

Literature Cited

Bandy, O. L., Casey, R. E., and Wright, R. C. 1971. Late Neogene planktonic zonation, magnetic reversals, and radiometric dates, antarctic to the tropics. pp. 1–26. In: Reid, J., ed. Antarctic Oceanology, I. Antarct. Res. Ser. 15. Am. Geophys. Union.Google Scholar
Casey, R. E., Partridge, T. M., and Sloan, J. R. 1970. Radiolarian life spans, mortality rates, and seasonality gained from recent sediment and plankton samples. pp. 159–165. In: Farinacci, A., Proc. of the II Plankton Conf. Roma 1970.Google Scholar
Dumitrica, P. 1973. Cretaceous and Quaternary Radiolaria in deep-sea sediments from the northwest Atlantic Ocean and Mediterranean Sea. pp. 829–901. In: Ryan, W. B. F. et al. Initial Reports of the Deep Sea Drilling Project, v. 13. U.S. Gov. Print. Off.; Washington.Google Scholar
Eldredge, N. 1971. The allopatric model and phylogeny in Paleozoic invertebrates. Evolution. 25:156–167.Google Scholar
Eldredge, N. and Gould, S. J. 1972. Punctuated equilibria: an alternative to phyletic gradualism. pp. 82–115. In: Schopf, T. J. M., ed. Models in Paleobiology. Freeman, Cooper and Co.; San Francisco, Calif.Google Scholar
Flessa, K. W., Powers, K. V., and Cisne, J. L. 1975. Specialization and evolutionary longevity in the Arthropoda. Paleobiology. 1:71–81.CrossRefGoogle Scholar
Gordon, A. L., Goldberg, R. D., and Hunkins, K. 1970. Circumpolar characteristics of Antarctic waters and sound channels in Antarctic waters. Folio 13. Antarctic Map Folio Series. Am. Geog. Soc.Google Scholar
Haldane, J. B. S. 1949. Suggestions as to quantitative measurements of rates of evolution. Evolution. 3:51–56.CrossRefGoogle ScholarPubMed
Hays, J. D. 1965. Radiolaria and late Tertiary and Quaternary history of Antarctic Seas. pp. 125–184. In Biology of the Antarctic Seas II, Antarct. Res. Ser. 5. Am. Geophys. Union.Google Scholar
Hays, J. D. and Opdyke, N. D. 1967. Antarctic Radiolaria, magnetic reversals and climatic change. Science. 158:1001–1011.CrossRefGoogle Scholar
Keany, J. and Kennett, J. P. 1972. Pliocene-early Pleistocene paleoclimatic history recorded in Antarctic-Subantarctic deep-sea cores. Deep-Sea Res. 19:529–548.Google Scholar
Kellogg, D. E. In press. Character displacement in the radiolarian genus Eucyrtidium.Google Scholar
Neumann, G. and Pierson, W. J. 1966. Principles of Physical Oceanography. 545 pp. Prentice-Hall; Englewood Cliffs, N. J.Google Scholar
Opdyke, N. D. 1972. Paleomagnetism of deep-sea cores. Rev. of Geophys. and Space Phys. 10:213–249.Google Scholar
Riedel, W. R. 1971. Cenozoic radiolarian evolution and biostratigraphy (abstract). Geol. Soc. Am. Annu. Meet.Google Scholar
Rowe, A. W. 1899. An analysis of the genus Micraster as determined by rigid zonal collecting from the zone of Rhynchonella curvieri to that of Micraster coranguinum. Q. J. Geol. Soc. Lond. 55:494–547.Google Scholar
Schopf, T. J. M., Raup, D. M., Gould, S. J., and Simberloff, D. S. 1975. Genomic versus morphologic rates of evolution: influence of morphologic complexity. Paleobiology. 1:63–70.Google Scholar
Simpson, G. G. 1951. Horses. 247 pp. Oxford Univ. Press; New York.Google Scholar
Simpson, G. G. 1953. The Major Features of Evolution. 434 pp. Simon and Schuster; New York.CrossRefGoogle Scholar
Westoll, T. S. 1950. Some aspects of growth studies in fossils. Proc. R. Soc., B. 137:490–509.Google Scholar