|2011 GSA Annual Meeting in Minneapolis (9–12 October 2011)|
|Paper No. 27-20|
|Presentation Time: 9:00 AM-6:00 PM|
FOUR NEW CRINOIDS FROM THE LOWER DEVONIAN OF BOLIVIA
THOMPSON, Jeffrey R., Department of Earth Sciences, The University of Southern California, Columbus, OH 43235, email@example.com and AUSICH, William, School of Earth Sciences, Ohio State University, School of Earth Sciences, 155 S Oval Mall, Columbus, OH 43210-1398|
Little is known of crinoid faunas from the Lower Devonian of South America; therefore, the four new Lower Devonian crinoids reported here from Bolivia are important discoveries. Two new taxa are reposted from the Icla Formation at Cerro Kochis in the Cochabamba Department. One of these new taxa has been identified as a new genus of Rhodocrinitid, the other has been identified as a new species of Griphocrinus. Two additional camerates are reported from the Belèn Formation of the Altiplano region in the La Paz Department. One of which is a new species of Ctenocrinus and the other is a Rhotocrinitid. In addition, a poorly preserved blastoid was recovered from the Altiplano region. These crinoids are described using systematic taxonomy. These taxa were previously unknown from South America. The specimens from the Cochabamba Department are from below the Francovichia zone and preserved in a micrite matrix. The specimens from the Altiplano are from silty mudstones. The specimens give us new insight into the Lower Devonian of Bolivia, a relatively new frontier in Crinoid research. The presence and diversity of the specimens indicate that there are likely more extensive crinoid faunas in Bolivia than previously expected, and that the Emsian period of Bolivia may be important in the expansion of known Crinoid taxa.
2011 GSA Annual Meeting in Minneapolis (9–12 October 2011)
General Information for this Meeting
|Session No. 27--Booth# 61|
Paleontology (Posters) I: Ecology and Phylogeny
Minneapolis Convention Center: Hall C
9:00 AM-6:00 PM, Sunday, 9 October 2011
Geological Society of America Abstracts with Programs, Vol. 43, No. 5, p. 85
© Copyright 2011 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.