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Three New Genera of Fossil Noncalcareous Algae from Valmeyeran (Mississippian) Strata of Illinois

Richard L. Leary
American Journal of Botany
Vol. 73, No. 3 (Mar., 1986), pp. 369-375
Stable URL: http://www.jstor.org/stable/2444080
Page Count: 7
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Three New Genera of Fossil Noncalcareous Algae from Valmeyeran (Mississippian) Strata of Illinois
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Abstract

Three previously unknown algal forms are preserved as carbonaceous residue and impressions in basal St. Louis Formation (Valmeyeran Series) of Jersey County, Ill. On the basis of morphologic similarities the algae are considered to belong to Rhodophyta and Phaeophyta. The algae are associated with conularia. The algae and conularia probably lived in shallow marine water on the eastern flank of the Ozark Dome and southern margin of the Illinois Basin. This region would have been at approximately 20 south latitude during the Visean.

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