In the Aglossal Xenopus, the tadpoles are likewise devoid of circular lip, horny teeth, and beak, and they are further remarkable in the following respects: There is a long tentacle or barbel on each side of the mouth, which appears to represent the "balancer" of Urodele larvae; the spiraculum is paired, one on each side; the fore limbs develop externally, like the hind limbs. [Please select]
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Association of the urodele stem with this group does not seem to have been proposed hitherto. [Please select]
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An addition to the Urodele Fauna of Kansas from the lower Pliocene. [Please select]
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The implication is that the Urodele condition is primitive, but it cannot now be supposed that Urodela are ancestral to any other group, and the rib-bearer is most probably a specialization limited to salamanders. [Please select]
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