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A Possible New Principle in Taxonomy, and its Evolutionary Implications

✍ Scribed by CROWSON, R. A.

Book ID
109573436
Publisher
Nature Publishing Group
Year
1953
Tongue
English
Weight
121 KB
Volume
171
Category
Article
ISSN
0028-0836

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## Abstract The mouthparts of anuran tadpoles are highly derived compared to those of caecilians or salamanders. The suprarostral cartilages support the tadpole's upper beak; the infrarostral cartilages support the lower beak. Both supra‐ and infrarostral cartilages are absent in other vertebrates.