Primate heritage, Biology

Table provides you the classification of the living primates. The primate fossil history dates back to 60 million years i.e. to Paleocene times, more specifically to the cretaceous age, The fossils of mammals of this period, their teeth, jaws and skulls bear affinities with Lemuroids.

In all these fossils apart from the structure of the molar teeth which is of primate character, there is a tendency in the skulls towards the expansion of the brain. Further there is a shortening of the face in these skulls, and the eyes which were initially laterally placed get a frontal

position. Also, there is a relative increase in the size of the cranium to accommodate a larger volume of brain.
The Lemurs found in the fossil records of the Eocene times were comparable to modern lemurs except that their brain was smaller and teeth specialisations were not found. Eocene times also showed tarsiers, the fossils of which showed primitive skulls, brain and limbs, significantly the number of teeth were reduced from 44 to 32, which is an anthropoid characteristic. Besides the numbers, the structure of the teeth with bicuspid premolars and tricuspid molars were typically anthropoid an in nature. Primates were abundant in North America and Europe until the end of Eocene and then disappeared completely.

There is a poor fossil record of primates in Oligocene times i.e. some 30 million years ago. In Egypt, in a place called Fayum a considerable diversity of primate remains were obtained. These primates belong to the genera Aegyptopithecus, Apidium, Aelopithecus and Oligopithecus. These fossils were clearly distinct from lemuroid fossils of Eocene times. All of them were small mammals and anthropoid in their characters. A nearly complete fossil of the skull jaws and other skeletal parts were obtained for Aegyptopithecus. The skeleton resembled that of a tree dweller, possessed a tail and was not a brachiator. The fossil suggested that the animal had along .snout, small bony eye sockets, sexual dimorphism of the canine and its teeth resembled those of apes. Possibly this animal was an ancestor of gibbons.

Posted Date: 4/5/2013 3:30:43 AM | Location : United States







Related Discussions:- Primate heritage, Assignment Help, Ask Question on Primate heritage, Get Answer, Expert's Help, Primate heritage Discussions

Write discussion on Primate heritage
Your posts are moderated
Related Questions
what is relationship between numbers CPH in photon and frequency of photon? Answer; the photon contains n CPH and its energy is E=hν, when photons energy increases that the num

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4


Q. What are the structures that participate in the human auditory sensitivity? The structures of the human auditory sensitivity are the ears (middle and internal, external) the

Which of these lists contains the four postulates  of natural selection? Which of these lists contains the four postulates of natural selection? Uniform population, heritable trait

Define in brief about the Golgi bodies In a cell is achieved in a remarkable fashion by the Golgi bodies. The latter receive the newly synthesised proteins from the rough endop


Types specimens of echpnodermata Before we begin the study of the selected specimens of the following echinoderms - Feather star, Brittle star, Sea urchin, Sea cucumber and Star

Theories are import because they can be used to a. Test research hypothesis b. Develop questions which will facilitate more effective research c. Conduct more meaningful and useful

Pound cake test In some cases, oil or margarine creaming volume is most accuratelymeasured by preparing a regular pound cake, omitting the chemical leavener andmeasuring the vo