Paleonet: New Publication Available

FELDMANN, RODNEY rfeldman at
Wed Mar 9 13:34:56 GMT 2011

Paula.  Wow! I opened this up and thought,"those guys are dead."  Sure enough, and then I saw that this was a leftover from the Hoover days.  I am glad to see that it is published.  Frest and Strimple did some great work. I am glad this is out. Rod
Dr. Rodney M. Feldmann
Department of Geology
Kent State University
Kent, OH 44242 USA
Phone: 330-672-2506
FAX: 330-672-7949
e-mail: rfeldman at<mailto:rfeldman at>

From: paleonet-bounces at [paleonet-bounces at] On Behalf Of Paula M Mikkelsen [pmm37 at]
Sent: Tuesday, March 08, 2011 2:55 PM
To: PaleoNet
Subject: Paleonet: New Publication Available

Paleontological Research Institution is proud to announce publication of Bulletins of American Paleontology, no. 380, "The North American Holocystites Fauna (Echinodermata: Blastozoa: Diploporita): Paleobiology and Systematics," by T. J. Frest, H. L. Strimple, and C. R. C. Paul (142 pp., 14 pls., ISBN 978-0-87710-493-3). See abstract below. The retail price is US $60.00. Please order online at<> or email me directly for a proforma invoice. Members of PRI and booksellers should contact me first to receive discount prices for this and other publications of PRI.

Abstract: The Holocystites fauna of central North America includes most known Silurian Diploporita (Echinodermata: Blastozoa). This distinctive diploporite association, widespread in the Wenlockian of Wisconsin, Illinois, Indiana, Kentucky, Ohio, and Tennessee, consists of eight genera in the Aristocystitidae, Sphaeronitidae, and Holocystitidae. Species of Holocystites Hall, 1864, and Triamara Tillman, 1967, are particularly characteristic. The fauna is best known from the Osgood Member, Salamonie Dolomite (late Llandoverian-early Wenlockian) of southeastern Indiana. Expanded quarrying operations near Napoleon, Ripley County, Indiana, add materially to knowledge of the Holocystites fauna. Thousands of specimens were recovered, including some in life position. Information from this and other localities allows formulation of a paleoecological model for the Holocystites fauna, which is tested against previously known distributional information. Most Silurian diploporites were low-level feeders with relatively inefficient subvective systems as compared with co-occurring camerate crinoids. In the Osgood, they required firm attachment sites in comparatively quiet, offshore, dominantly soft-bottomed environments with a moderate rate of continuous terrigenous sedimentation, conditions limited in southeastern Indiana to the Ripley Island positive area. Two major adaptive strategies are recognized: one relatively eurytopic group comprising species with free adults with elongate thecae, narrow bases, and aboral, stem-like processes, and a more stenotopic group of globular, large-based, completely sessile (attached) species. New taxa include a species of Holocystites Hall, 1864 (H. clavus n. sp.), a new genus (Paulicystis n. gen.) related to Trematocystis Jaekel, 1899, but with uniquely large ambulacral facets, and a new Pentacystis-like genus (Osgoodicystis n. gen.). The fauna also has an advanced sphaeronitid (Finitiporus n. gen.), the only Silurian sphaeronitid yet known. Both the Sphaeronitidae and Holocystitidae are revised. Subfamilies are established in both (Sphaeronitidae: Sphaeronitinae and Herpetocystinae; Holocystitidae: Holocystitinae, Pentacystinae, and Trematocystinae), based largely on peristome morphology. Holocystites is divided into three new subgenera (Holocystites, Megacystites n. sgen., and Sepulticystis n. sgen.) on the basis of pore morphology. Evolutionary trends are noted in the Holocystitidae toward reduction in number of thecal and peristomial plates, enlargement of the subvective system, elevation of the theca. Humatipore morphology becomes more specialized and efficient, but average size decreased. Detailed specific and generic phylogenies are constructed, using both traditional and quantitative phenetic methods. All produced similar results. Osgood diploporite biostratigraphy is revised and a zonal scheme presented. Osgood diploporites are strongly endemic.

Paula M. Mikkelsen, Ph.D.
Associate Director for Science
and Director of Publications
Paleontological Research Institution
1259 Trumansburg Road
Ithaca, NY 14850
Tel. (607) 273-6623, ext. 20
Fax (607) 273-6620
email  pmm37 at<mailto:pmm37 at>

"No passion in the world is equal to the passion to alter someone else's draft."  -H. G. Wells

See "Seashells of Southern Florida: Living Marine Mollusks of the Florida Keys and Adjacent Regions: Bivalves<>" and BivAToL - Assembling the Bivalve tree of Life<>.

On Exhibit at Museum of the Earth:
Maize - Mysteries of an Ancient Grain, March 11 - May 22, 2011. Made possible by the National Science Foundation.
Mon.-Sat. 10 am - 5pm and Sun. 11 am - 5 pm.
Closed Tuesday and Wednesday (Labor Day to Memorial Day).

PRI and its Museum of the Earth<> are part of Ithaca's Discovery Trail<>.

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