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The ontogeny of the Mississippian blastoid Orophocrinus

Donald B. Macurda
The ontogeny of the Mississippian blastoid Orophocrinus
Journal of Paleontology (1966) 40 (1): 92-124


Plates grew by addition of calcite at their edges, but at different rates along different edges. Growth along one edge was constant, and is used as a datum for comparison of growth along other edges. Growth curves thus derived provide means of comparing ontogenies of different individuals, populations, or taxa. The genus is revised, the type species Orophocrinus stelliformis (Owen and Shumard) redescribed, and O. campanulatus (Hambach) and O. (Codaster) whitei Whitfield (non Hall, part) placed in its synonymy. Codaster whitei Hall is assigned to Hydroblastus. Orophocrinus occurs in Upper Kinderhookian and Lower Osagean series of Illinois, Iowa, Missouri, New Mexico, and Arizona, and in the Tournaisian and Visean of Europe.

ISSN: 0022-3360
EISSN: 1937-2337
Serial Title: Journal of Paleontology
Serial Volume: 40
Serial Issue: 1
Title: The ontogeny of the Mississippian blastoid Orophocrinus
Pages: 92-124
Published: 1966
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
Accession Number: 1966-002371
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus., tables
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1966
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