The Simians originated in Asia while the crown simians were in Afro-Arabia. The divergence between strepsirrhines, simians, and tarsiers likely followed almost immediately after primates first evolved. However, some mammals have lost the ability to synthesize vitamin C, notably simians and tarsiers. Female dominance, which is rare in simians, is fairly common in lemurs. The simians are sister to the tarsiers, together forming the haplorhines. Simians and tarsiers emerged within haplorrhines some 60 million years ago. The smallest accepted taxon which contains all the monkeys is the infraorder Simiiformes, or simians. New World monkeys and catarrhine monkeys emerged within the simians some 35 million years ago. Irish people were considered brutish and (like blacks) were often compared to simians. In the simians, the uterus chambers have fused, an otherwise rare condition among mammals. Extant simians are split into three distinct groups. The Simians return and rebuild Mechagodzilla in "Terror of Mechagodzilla". Ubebas are simians, native to the planet Cholganna. Anthropoidea contained all of the simians.