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Mississippian and Pennsylvanian Sponges from the Ouachita Mountains of Oklahoma

J. Keith Rigby, C. Kent Chamberlain and B. Allen Black
Journal of Paleontology
Vol. 44, No. 5 (Sep., 1970), pp. 816-832
Stable URL: http://www.jstor.org/stable/1302715
Page Count: 20
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Mississippian and Pennsylvanian Sponges from the Ouachita Mountains of Oklahoma
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Abstract

The new species Haplistion apletum, large specimens of Phacellopegma schizoderma Finks, and the new large brachiospongid hexactinellid Arakespongia mega are described from specimens collected from the Morrowan Wapanucka Limestone, near Hartshorne, Oklahoma. The new genus, Arakespongia, is a large, open bowl-shaped, thick-walled sponge whose walls contain large parietal gaps and are armoured with large reflected, somewhat nodose pentacts. A nearly complete, though somewhat poorly preserved Dictyospongia sp. is described from the middle Atoka Formation. Other protospongioid fragments and hexactine spiculites are described from the Johns Valley and Wesley formations of Upper Mississippian and Lower Pennsylvanian ages.

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