The record of euprimates during the Iberian Eocene shows a much greater diversity, being represented by two distinct groups of Paleogene "
prosimians": adapoids and omomyoids (8 and 3 genera, respectively, apart from several forms without generic ascription, which in some cases may lead to the description of new taxa after further studies).
Duke veterinarian Patricia Feeder has placed chips in 20 of the center's 500
prosimians.
The researchers' scenario holds that about 60 million years ago the earliest
prosimians leaped about in the trees, usually clinging to branches with the help of the right hand and reaching for food with the left hand.
And this puts Amphipithecus smack in the midst of a long-standing debate over which lower primate gave rise to the anthropoids: adapids or another
prosimian group called the omomyids, which are related to modern tarsiers.
Lemurs are
prosimians - primates that began to evolve before monkeys - and as such provide a crucial link to our understanding of evolution.
From an ecological point of view the low metabolic rates of
prosimians are not an evolutionary primitive feature but rather represent a mechanism to cope with environmental constraints (Muller, 1985).The Sichuan golden monkey (Rhinopithecus roxellana) is well-known as the non-human primate with the highest known altitudinal distribution.
They cover primate origins, the evolution of
prosimians, anthropoid origins and New World monkeys, the evolution of Old World monkeys and apes, Ramapithecus and human origins, early hominids, and diverse approaches in human evolution.
Hurum's claim was that, although Ida plainly resembled some
prosimians (lemurs, tarsiers, and their extinct ancestors), her fossil also revealed anthropoid-like--and thus human-like--features including a partially fused lower mandible and a talus foot bone.
Vasey in International Review of Primatology, "Available data indicate that this behavior [same-sex sexuality] is phylogenetically widespread among the anthropoid primates, but totally absent among
prosimians. ...
(66) A similar study, conducted on twenty-nine different primate taxa, including twenty
prosimians, eight Old World monkeys, and humans, again demonstrated large relative increases in gyrification in prefrontal cortical regions and in parietotemporal association cortical regions in humans (Figure 2).
The nonhuman primates fall into three groups, including small animals known as
prosimians, monkeys, and apes.
Lemurs are
prosimians, or a type of primate (group of mammals that includes humans, apes, monkeys, and lemurs).