The oldest of these fossils that can be assigned to eukaryotes date back to the late Palaeoproterozoic in the acritarchs Tappania and Shuiyousphaeridium.[2] Findings of other fossils exhibiting structural complexity, albeit not taxonomically resolved, consolidate the fact of pre-Ediacaran eukaryotic life. The oldest unambiguous crown eukaryote is dated in the late Mesoproterozoic and is the Bangiomorpha, which can be recognized as a red algae.