Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-22T03:21:39.399Z Has data issue: false hasContentIssue false
  • English
  • Français

Abnormalities in Pentremites Say (Blastoidea) from the Pella Formation (Upper Mississippian) of Iowa

Published online by Cambridge University Press:  19 May 2016

Alan S. Horowitz ,
Susan Able  and
H. L. Strimple
Alan S. Horowitz
Affiliation:
1Department of Geology, Indiana University, Bloomington 47405
Susan Able
Affiliation:
1Department of Geology, Indiana University, Bloomington 47405
H. L. Strimple
Affiliation:
2Department of Geology, University of Iowa, Iowa City 52242
Get access Rights & Permissions [Opens in a new window]

Abstract

Approximately 10,000 determinable specimens of Pentremites pulchellus Ulrich (Blastoidea, Echinodermata) from a single quarry in the Pella Formation near Oskaloosa, Mahaska County, Iowa, have been examined for abnormal morphologic characters. The total frequency (2.7%) and the frequency among different types of abnormalities (ambulacral 29%; basal 46%; symmetrical 12%) are significantly different in the Pella material than in previously published studies (Wanner, 1932; Macurda, 1980). The greater frequency of abnormalities in the Pella Formation than in previous studies may reflect higher environmental stress because of variable temperatures or salinities or both. The kinds of abnormalities are the same among published studies, which suggest that the underlying biological causes of abnormalities were similar throughout the geologic history of the blastoids. Ambulacral abnormalities are symmetrically distributed, but the division and inversion of basal plates show an asymmetrical distribution as previously recorded by Macurda (1980). The Pella Formation is of Genevievian age (Upper Mississippian) based on the occurrence of Pugnoides ottumwa (White) and convex ambulacra in Pentremites pulchellus. Other unequivocal guide fossils are unknown in the Pella Formation.

Type
Research Article
Information
Journal of Paleontology , Volume 60 , Issue 2 , March 1986 , pp. 390 - 399
Copyright
Copyright © The Paleontological Society 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Avcin, M. J. and Koch, D. L. 1979. The Mississippian and Pennsylvanian (Carboniferous) systems in the United States—Iowa. United States Geological Survey Professional Paper 1110-M, p. M1–M13.Google Scholar
Berninghausen, W. H. 1949. Upper Mississippian ostracodes from the Pella beds of south-central Iowa. Unpublished M.S. thesis, University of Iowa, Iowa City, 42 p.Google Scholar
Broadhead, T. W. 1981. Carboniferous camerate crinoid subfamily Dichocrininae. Palaeontographica, Abteilung A, 176(4–6):81–157.Google Scholar
Broadhead, T. W. and Strimple, H. L. 1980. Hyrtanecrinus, a new Carboniferous camerate crinoid genus from eastern North America. Journal of Paleontology, 54(1):35–44.Google Scholar
Craig, L. C. et al. 1979. Paleotectonic investigations of the Mississippian system in the United States. United States Geological Survey Professional Paper 1010, 559 p.Google Scholar
Frest, T. J. and Strimple, H. L. 1977. Praepholidocidaris, a new echinoid from the Pella Formation (Mississippian) of Iowa. Proceedings of the Iowa Academy of Science, 84:98–105.Google Scholar
Horowitz, A. S., Able, Susan and Strimple, H. L. 1982. Abnormalities in a population of Pentremites Say from the Pella Formation of Iowa. Geological Society of America, Abstracts with Programs, 14(5):262.Google Scholar
Horowitz, A. S., Macurda, D. B. Jr. and Waters, J. A. 1981. Taxonomic revision of Pentremites Say (Blastoidea). Geological Society of America, Abstracts with Programs, 13(6):281.Google Scholar
Johnson, G. D. and Vondra, C. F. 1969. Lithofacies of Pella Formation (Mississippian), southeastern Iowa. American Association of Petroleum Geologists Bulletin, 53(9):1894–1908.Google Scholar
Lane, N. G. and Webster, G. D. 1967. Symmetry planes of Paleozoic crinoids. University of Kansas Paleontological Contributions, Paper 25, p. 14–16.Google Scholar
Lees, J. H. and Thomas, A. O. 1919. The Ste. Genevieve marls near Fort Dodge and their fauna. Proceedings of the Iowa Academy of Science, 25:599–616.Google Scholar
Macurda, D. B. Jr. 1975. The Pentremites (Blastoidea) of the Burlington Limestone (Mississippian). Journal of Paleontology, 49(2):705–710.Google Scholar
Macurda, D. B. Jr. 1978a. Abnormalities and asymmetries in blastoids—a key to larval bilateral symmetry? Geological Society of America, Abstracts with Programs, 10(7):449.Google Scholar
Macurda, D. B. Jr. 1978b. The Mississippian blastoid genus Cribroblastus . Journal of Paleontology, 52(6):1288–1293.Google Scholar
Macurda, D. B. Jr. 1980. Abnormalities of the Carboniferous blastoid Pentremites . Journal of Paleontology, 54(6):1155–1162.Google Scholar
Rexroad, C. B. and Furnish, W. M. 1964. Conodonts from the Pella Formation (Mississippian), south-central Iowa. Journal of Paleontology, 38(4):667–676.Google Scholar
Rohlf, F. J. and Sokal, R. R. 1969. Statistical Tables. W. H. Freeman and Company, San Francisco, 253 p.Google Scholar
Siegal, Sidney. 1956. Nonparametric Statistics for the Behavioral Sciences. McGraw-Hill Book Company, New York, 312 p.Google Scholar
Sokal, R. R. and Rohlf, F. J. 1969. Biometry, the Principles and Practice of Statistics in Biological Research. W. H. Freeman and Company, San Francisco, 776 p.Google Scholar
Strimple, H. L. 1968. A new edrioasteroid. Proceedings of the Iowa Academy of Science 1966, 73:260–262.Google Scholar
Strimple, H. L. 1974. A preliminary study of echinoderms with the aid of a scanning electron microscope. Proceedings of the Iowa Academy of Science, 81(2):51–55.Google Scholar
Ulrich, E. O. 1890. Palaeozoic Bryozoa. Geological Survey of Illinois, 8:283–688.Google Scholar
Van Tuyl, F. M. 1925. The stratigraphy of the Mississippian formations of Iowa. Annual Reports 1921 and 1922, Iowa Geological Survey, 30:33–374.Google Scholar
Wanner, Johannes. 1932. Neue Beiträge zur Kentniss der Permischen Echinodermen von Timor. VII. Die Anomalieen der Schizoblasten. Dienst van den Mijnbouw in Nederlandsch-Indië Wetenschappelijke Mededeelingen, 20, 46 p.Google Scholar
Waters, J. A. 1980. Paleoecology of the lower Bangor Limestone (Mississippian: Chesterian) from northwestern Alabama, p. 56–68. In Tull, J. F. (ed.), Field trips for the southeastern section of the Geological Society of America, Southeastern Section, Guidebook 29th Annual Meeting.Google Scholar
Weller, J. M. et al. 1948. Correlation of the Mississippian formations of North America. Bulletin of the Geological Society of America, 59(2):91–196.CrossRefGoogle Scholar
Weller, Stuart. 1909. Correlation of the Middle and Upper Devonian and the Mississippian faunas of North America. V. Journal of Geology, 17(3):257–286.CrossRefGoogle Scholar
Weller, Stuart. 1914. The Mississippian Brachiopoda of the Mississippi Valley Basin. Illinois State Geological Survey Monograph 1, 508 p.Google Scholar
Weller, Stuart. 1920. The geology of Hardin County and the adjoining part of Pope County. Illinois State Geological Survey Bulletin, 41, 416 p.Google Scholar
Weller, Stuart. 1921. Geology of the Golconda Quadrangle, a detailed report on the stratigraphy and structure of that portion of the Golconda Quadrangle lying in Kentucky. Kentucky Geological Survey, series 6, v. 4, 148 p.Google Scholar
Weller, Stuart. 1923. Geology of the Princeton Quadrangle, a detailed report on the stratigraphy and structure of the Princeton, Kentucky region. Kentucky Geological Survey, series 6, v. 10, 126 p.Google Scholar
Weller, Stuart. 1926. Faunal zones, standard Mississippian section. Journal of Geology, 34(4):320–335.CrossRefGoogle Scholar
Weller, Stuart. 1927. Geology of the Cave in Rock Quadrangle, a detailed report on the stratigraphy, structure and areal distribution of rocks south of the Ohio River and in the vicinity of Marion, Kentucky. Kentucky Geological Survey, series 6, v. 26, 128 p.Google Scholar
Weller, Stuart. and van Tuyl, F. M. 1915. The Ste. Genevieve Formation and its stratigraphic relations in southeastern Iowa. Proceedings of the Iowa Academy of Science for 1915, 22:241–247.Google Scholar
White, C. A. 1862. Description of new species of fossils from the Devonian and Carboniferous rocks of the Mississippi Valley. Proceedings of the Boston Society of Natural History, 9:8–33.Google Scholar
White, C. A. 1883. Contributions to invertebrate paleontology. No. 8: fossils from the carboniferous rocks of the interior states. Twelfth Annual Report of the United States Geological and Geographical Survey of the Territories: a report of progress of the exploration in Wyoming and Idaho for the year 1878. In two parts. Part I, p. 155–171.Google Scholar