… Eocene epoch (just after the Paleocene), the first fossil bat appears suddenly in the fossil record. When it does, it is unquestionably a bat, capable of true flight. Yet, we find nothing … bat described by Simmons et al. (2008). Modified image used with permission. Scale bar = 1 cm. …
… the lineage. Vertebrate limb homology: Image produced by Jerry Crimson Mann, and released under the … ancestor; that similarity is a homology. The bones in the bat wing have the same arrangement as the bones in your … the wing itself is independently derived within each group. Image by J. Rosenau. Birds have the same arm bones …
… wing itself is independently derived within each group. Image by J. Rosenau. The claim of consistency because … Because of the basic physics of flight, bird wings, bat wings and pterosaur wings must all be similarly shaped. … body, with the thumb and three fingers free of the wing. Bat wings consist of skin stretched across all 4 fingers and …
… . Homology of vertebrate limbs: Image produced by Jerry Crimson Mann , and released under … and maintaining equilibrium during swimming. In the bat, the forelimbs have turned into wings for flying by …