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The Middle Ear of the Genus Uma Compared to Those of the Other Sand Lizards
Alvin M. Earle
Vol. 1962, No. 1 (Apr. 11, 1962), pp. 185-188
Stable URL: http://www.jstor.org/stable/1439496
Page Count: 4
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The columella auris of Uma is smaller in comparison to that of the other sand lizards and does not articulate firmly with the quadrate. The depressor mandibulae anterior of Uma is smaller than those of Holbrookia and Callisaurus, while the constrictor colli is much larger than the same muscle of the other two genera. Apparently the genus Uma represents a very early offshoot of the basic sand lizard progenitor.