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A New Species of Astraeospongia from the Middle Ordovician of Northern Illinois
R. C. Gutschick
Journal of Paleontology
Vol. 28, No. 4 (Jul., 1954), pp. 430-433
Published by: SEPM Society for Sedimentary Geology
Stable URL: http://www.jstor.org/stable/1300159
Page Count: 4
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Astraeospongia dixonensis n. sp., based upon eleven isolated octactinellid sponge spicules, occurs in Middle Ordovician rocks of Dixon, Illinois. The genus has previously been known in North America only from the Silurian and Devonian.
Journal of Paleontology © 1954 SEPM Society for Sedimentary Geology