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1 March 2006 TADPOLES EVOLVED AND FROGS ARE THE DEFAULT
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Abstract

The thesis of this heuristic discussion is that the frog morphotype arose via a regulatory mutation that truncated vertebrae-forming somitogenesis and not via selection on structural genes. This truncation, along with many collaborative events (e.g., other skeletal elements, viscera, jaws, and mouthparts) required to maintain a viable organism, produced the essence of a prototadpole. With the presumed confines of metamorphosis, only something resembling a frog could metamorphose from such a highly paedomorphic larva. Larvae and adults were further altered by other less deep regulatory changes and subsequent selection to produce characters correlated with systematics and ecology.

Ronald Altig "TADPOLES EVOLVED AND FROGS ARE THE DEFAULT," Herpetologica 62(1), (1 March 2006). https://doi.org/10.1655/05-23.1
Accepted: 1 September 2005; Published: 1 March 2006
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