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Late Mississippian (Chester) Allagecrinus (Crinoidea) from Illinois and Kentucky

Raymond C. Gutschick
Late Mississippian (Chester) Allagecrinus (Crinoidea) from Illinois and Kentucky
Journal of Paleontology (1968) 42 (4): 987-999


Three localities in southern Illinois and western Kentucky have yielded about 270 tiny crinoids, all belonging to two new species of Allagecrinus. A. coronarius, n.sp., is from the Shetlerville Member of Renault Formation and the Ridenhower (Paint Creek) Formation, low in the Chester Series; A. elegantulus n.sp., is from the Cave Hill Member of Kinkaid Limestone, high in the Chester. Ontogeny progresses from armless forms to eight-armed forms, to one specimen with 14 arms. Phylogeny of the genus shows progressive decrease in height and increase in width of the calyx. The Chester species are compared with Lower Carboniferous species of Scotland.

ISSN: 0022-3360
EISSN: 1937-2337
Serial Title: Journal of Paleontology
Serial Volume: 42
Serial Issue: 4
Title: Late Mississippian (Chester) Allagecrinus (Crinoidea) from Illinois and Kentucky
Pages: 987-999
Published: 1968
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
Accession Number: 1968-057845
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus., tables
N37°00'00" - N42°30'00", W91°30'00" - W87°30'00"
N36°30'00" - N39°10'00", W89°40'00" - W82°00'00"
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: 1968
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