analogous structures have the same function but do not share a common ancestry.
what types of structures have the same function but do not share a common ancestry?
analogous structures
na
na
a 2018 study of the remains of two small jurassic-age pterosaurs from inner mongolia, china, found that pterosaurs had a wide array of pycnofiber shapes and structures, as opposed to the homogenous structure generally considered to cover them. the analysis found that at least some of these were very similar in structure to 4 different feather structures commonly known from birds and dinosaurs but almost never known from pterosaurs prior to the study. it is unknown if these "feathers" share a common ancestry with bird feathers or independently evolved from them, but the study's senior author, mike benton, has stated that despite heavy analysis, there was virtually no recorded difference between the structures and bird or dinosaur feathers, and they thus likely share a common ancestry with them.
pterosaur