Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-22T03:33:05.088Z Has data issue: false hasContentIssue false
  • English
  • Français

A microcrinoid colony from a cephalopod body chamber (Chesterian: Arkansas)

Published online by Cambridge University Press:  19 May 2016

Royal H. Mapes ,
N. Gary Lane  and
Harrell L. Strimple
Royal H. Mapes
Affiliation:
Department of Geology, Ohio University, Athens 45701
N. Gary Lane
Affiliation:
Department of Geology, Indiana University, Bloomington 47405
Harrell L. Strimple
Affiliation:
Department of Geology, University of Iowa, Iowa City 52242
Get access Rights & Permissions [Opens in a new window]

Abstract

An unusual occurrence of a colony of microcrinoids from shale within a fragment of a large orthoconic nautiloid body chamber is described from the Imo Formation (Mississippian, Chesterian) near Elba, Arkansas. The colony, about 70 individuals, consists principally of immature specimens that lack facets for the arms, and a few mature specimens with four or five arm facets. The crinoids are interpreted as record of a census population that was engulfed suddenly by mud. The crinoids are assigned to Allagecrinus coronarius Gutschick, 1968. The body chamber may have been broken during predation by other large cephalopods, or sharks, known from the Imo, or by post-mortem transport. The shell served as a firm substrate on which the microcrinoid larvae could settle and the convex sides may have provided some protection from currents.

Type
Research Article
Information
Journal of Paleontology , Volume 60 , Issue 2 , March 1986 , pp. 400 - 404
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

Burdick, D. W. and Strimple, H. L. 1973. New Late Mississippian crinoids from northern Arkansas. Journal of Paleontology, 47:231–243.Google Scholar
Chamberlain, J. A., Ward, P. D. and Weaver, J. S. 1981. Post-mortem ascent of Nautilus shells: implications for cephalopod paleobiogeography. Paleobiology, 1(4):494–509.Google Scholar
Gordon, Mackenzie Jr. 1965 [1964]. Carboniferous cephalopods of Arkansas. United States Geological Survey, Professional Paper, 460, 322 p.Google Scholar
Gutschick, R. C. 1968. Late Mississippian (Chester) Allagecrinus (Crinoidea) from Illinois and Kentucky. Journal of Paleontology, 42:987–999.Google Scholar
Gutschick, R. C. and Sandberg, C. A. 1983. Mississippian continental margins of the conterminous United States. Society of Economic Paleontologists and Mineralogists, Special Publication, 33:79–90.Google Scholar
Haven, Norine. 1972. The ecology and behavior of Nautilus pompilius in the Philippines. The Veliger, 15(2):75–80.Google Scholar
Lane, N. G. 1981. A near-shore sponge spicule mat from the Pennsylvanian of west-central Indiana. Journal of Sedimentary Petrology, 55:197–202.Google Scholar
Lane, N. G. and Sevastopulo, G. D. 1981. Functional morphology of a microcrinoid: Kallimorphocrinus punctatus n. sp. Journal of Paleontology, 55:13–28.Google Scholar
Mapes, R. H. 1979. Carboniferous and Permian Bactritoidea (Cephalopoda) in North America. University of Kansas, Paleontology Contribution, 64, 75 p.Google Scholar