Circle ecology composition with cartoon style drawn earth globe divided into two halves clean and polluted vector illustrationBrowse unique items from craftylittlenodes on etsy, global marketplace of handmade, vintage and creative goods. Drunk old woman stock photos, illustrations, and vector art () Evolution. the delicate skeletons of bats do not fossilise well, and it is estimated that only % of bat genera that lived, have been found in the fossil record. most of the oldest known bat fossils were already very similar to modern microbats, such as archaeopteropus ( million years ago). the extinct bats palaeochiropteryx tupaiodon .