The remains of small embolomeres (total midline skull length not exceeding 100 mm) from the Middle Pennsylvanian (Desmoinesian) Linton and Five Points coal mines of southeastern Ohio can be distinguished from those of Leptophractus found at the same localities by the form and size of the teeth. Its well-ossified condition relative to a comparably sized juvenile specimen of the embolomere Archeria indicates a much smaller maximum adult size than that of Leptophractus, the other described embolomere from the Linton Coal Mine. Tooth form and count, shape of the squamosal and surangular crest, and stratigraphic occurrence all support tentative placement in the family Archeriidae.
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Vol. 523 • No. 1