Georges Cuvier iyo kuwa kale waxay sameeyeen horumar ballaaran oo ku saabsan isbarbardhigga isbarbardhigga iyo paleontology dabayaaqadii 1790s iyo horraantii qarnigii 19aad. In taxane ah oo muxaadarooyin iyo waraaqaha in sameeyey isbarbardhig faahfaahsan oo u dhexeeya naasleyda nool iyo haraaga ah ee la helay Cuvier ahaa awoodaan si ay u dhisaan in haraaga ah ee noocyada in ay noqdeen extinct halkii ay ka haray noocyada weli nool meelo kale oo adduunka ah, sida la ballaaran loo sheegay.
anatomiyada isbarbardhiga ah iyo cilmiga duugista