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William Alvin Clemens
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Description and comments.—P4 of KU no. 11210 has a large posterolingual cusp separated from the main cusp by a distinct groove, which deepens posteriorly. The posterolingual cusp is supported by the broad posterior root. P4 of the type specimen of Sinclairella dakotensis is described (Jepsen, 1934, p. 392) as having an oval outline at the base of the crown, and a small, posterolingual cusp. A chip of...
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