# toothless mammal with keratin scales

The coevolution of rostral keratin and tooth distribution in dinosaurs » Teeth evolved early in vertebrate evolution, and their morphology reflects important specializations in diet and ecology among species. The toothless jaws (edentulism) in extant birds likely coevolved with beak keratin, which functionally replaced teeth.… Ncbi.nlm.nih.gov

(PDF) Tooth vs. Beak: The Evolutionary Developmental Control of the Avian Feeding Apparatus » PDF | Recent discoveries of exquisitely preserved nonavialan and avialan theropod dinosaurs have not only prompted studies of theropod tooth…| 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

Take pangolins off the menu now! » The pangolin played a tragic role in the COVID-19 pandemic when the deadly virus was believed to have made the leap from pangolins to humans in a Chinese market. Pangolin scales are used in traditional Chinese medicine and their meat is in demand among status-conscious Asian “gourmets”, making them the most trafficked animal ever. Rainforest-rescue.org

Heterochronic truncation of odontogenesis in theropod dinosaurs provides insight into the macroevolution of avian beaks | PNAS » Beaks are innovative structures characterizing numerous tetrapod lineages, including birds, but little is known about how developmental processes i… Pnas.org

Are Birds Dinosaurs? A Critical Analysis of Fossil Findings » The putative descent of birds from dinosaurs has become established as one of the most popular evolutionary transitions. Answersingenesis.org