# toothless mammal with keratin scales

What is a pangolin? » Often thought of as a reptile, pangolins are actually mammals. They are covered in distinctive scales that ward off predators in the wild.  Worldwildlife.org

Genomic and anatomical comparisons of skin support independent adaptation to life in water by cetaceans and hippos » Springer et al. perform genomic and anatomical comparisons to determine whether aquatic adaptations of the skin in hippos and cetaceans are shared derived or convergent features in these two clades. The results of these comparisons support the hypothesis that aquatic adaptations of the skin are convergent characters in hippos and cetaceans. Cell.com

(PDF) Tetrapod Teeth: Diversity, Evolution, and Function » PDF | Teeth provide an excellent model system for understanding evolutionary change and how it has led to adaptive diversity across tetrapods. Their…| Find, read and cite all the research you need on ResearchGate Researchgate.net

A review and reappraisal of the specific gravities of present and past multicellular organisms, with an emphasis on tetrapods » <em>The Anatomical Record</em> is an anatomy journal publishing new discoveries in the morphological aspects of molecular, cellular, developmental, evolutionary, and systems biology. Anatomypubs.onlinelibrary.wiley.com