Externally, _toltecus_ differs from _aztecus_ in being smaller and darker; cranially, _toltecus_ also is the smaller and the P2 and M2 are more angular lingually than in _aztecus_, in which the teeth are rounded. [Please select]
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3/3; when two upper premolars present, anterior one minute, peglike, and displaced lingually; M3 much reduced, area of its crown less than a third that of M1. [Please select]
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