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Saadanius had a longer face than living catarrhines and lacked the advanced frontal sinus found in living catarrhines. However, it had a bony ectotympanic and teeth comparable to those of living catarrhines. Its discovery provided new information about the early evolution of catarrhines.
The parvorder Catarrhini / k æ t ə ˈ r aɪ n aɪ / (known commonly as catarrhine monkeys, Old World anthropoids, or Old World monkeys) consists of the Cercopithecoidea and apes (Hominoidea). In 1812, Geoffroy grouped those two groups together and established the name Catarrhini, "Old World monkeys", (" singes de l'Ancien Monde " in French ).
Catarrhini splits into 2 superfamilies, Old World monkeys (Cercopithecoidea) and apes . Human trichromatic color vision had its genetic origins in this period. Catarrhines lost the vomeronasal organ (or possibly reduced it to vestigial status). Proconsul was an early genus of catarrhine primates.
They are one of the earliest known families of catarrhines. [1] [2] They have a number of features in common with extant catarrhines, but also features that are primitive and not found in later catarrhine families. [1] There are five species, which are close enough to be often viewed as all belonging to a single genus.
Aegyptopithecus zeuxis was a species that had a dental formula of 2.1.2.3 2.1.2.3, with the lower molars increasing in size posteriorly. The molars showed an adaptation called compartmentalizing shear, which is where the cutting edges involved in the buccal phase serve to surround basins in such a way that food is cut into fragments that are ...
Dionysopithecidae is an extinct family of fossil catarrhines and the earliest-known and most primitive members of the Pliopithecoidea superfamily, with fossils in Sihong, China dating to 18–17 million years ago for species Dionysopithecus shuangouensis and Platodontopithecus jianghuaiensis.
After the LECA, some 2 billion years ago, the eukaryotes diversified into a crown group, which gave rise to animals, plants, fungi, and protists. Eukaryogenesis , the process which created the eukaryotic cell and lineage, is a milestone in the evolution of life, since eukaryotes include all complex cells and almost all multicellular organisms.
The family Pliopithecidae is an extinct family of fossil catarrhines and members of the Pliopithecoidea superfamily. Their anatomy combined primitive features such as a small braincase, a long snout, and a tail.