One more example of morphological convergence: similarity between the architectonics of feather and hair.
Chernova
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Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 117071 Russia.
D000818:Animals; D005075:Biological Evolution; D005241:Feathers / Q000648:ultrastructure*; D006197:Hair / Q000648:ultrastructure*; D008322:Mammals; D008855:Microscopy, Electron, Scanning; D008954:Models, Biological