| image = Notharctus Tenebrosus.jpg | image_caption = Notharctus tenebrosus | regnum = Animalia | phylum = Chordata | classis = Mammalia | ordo = Primates | familia = †Notharctidae | subfamilia = †Notharctinae | genus = †Notharctus | genus_authority = Leidy, 1870 | subdivision_ranks = Species | subdivision = †Notharctus pugnax †Notharctus robustior †Notharctus tenebrosus †Notharctus tyrannus †Notharctus venticolus }} Notharctus was an early primat… (More on Notharctus)