Lethabo

im 22 years old, female doing my honns in ecological informatics at csir(pretoria)

Name:
Location: pretoria, gauteng, South Africa

i completed my Bsc (microbiology physiology) degree in 2005 at University of Limpopo, now im doing my honns in ecological informatics at university of the western cape.

Tuesday, May 16, 2006

THE DIFFERENCES BETWEEN NEW AND OLD WORLD MONKEY

The scientific name for the New World monkey is Platyrrhini. The New monkeys are the four families of primates found in Central and South America. New monkeys differ slightly from the Old World monkeys in many aspects, but mostly concerning the nose. The nose is the feature that is used mostly to differentiate the New monkey from the Old monkeys. The New World monkey has a flat nose, with side facing nostrils. New World monkeys have a long, prehensile tail (their tail has adapted to be used as the fifth hand). Many of them are small (arboreal), spend most of their time in trees or in the bushes and they sleep during the day and are active during the night (nocturnal). Many New World monkeys like to form monogamous pair bonds (remain with one partner for sexual reproduction and the raising of the young) and they show a substantial paternal care (fatherly care) of their young (2).

The Old World monkeys are called the Cercopithecidae which are a group of primates. They fall into the superfamily of Cercopithecoidea in the clade Catarrhini. They are found mostly in Africa and Asia but are also known to come from Europe. The Old World monkeys are unlike apes in that most of them have tails (tailed apes) when they are viewed from the superficial point of view. Their tails are never prehensile unlike the New World monkeys. The distribution of catarrhines (Old World monkeys) from the platyrrhines (New World monkeys) depends on the structure of the nose and the distinction of Old World monkeys from apes depends on dentition (1).

Most of the Old World monkeys have anatomical oddities. For example the colobus monkeys have a stub for a thumb; the Proboscis monkey has an extraordinary nose while the snub-nosed monkeys have almost no nose at all. The male Mandrill has a red coloured penis and the scrotum is a lilac colour while the face has bright coloration like the genitals. This develops only in the dominant males of a multi-male group (1).

Old World monkeys (e.g. Mandrills) are omnivores and acquires their food by foraging (mainly plants, insects and smaller animals) and the New World monkeys like to eat nuts, berries and insects (3). New World monkeys spend most of their time in trees and the Old World monkeys climb trees occasionally especially when they are going to sleep. There is no paternal care in the Old World monkeys like in the New World monkeys the offspring are looked after by their mother until they are adults. Old World monkeys have narrow noses or they do not have noses at all while the New World monkeys have flatter noses.

New World monkeys (Howler monkeys) range from 56 to 92 cm in size and have a life span of 15 to 20 years. They live in groups of about 18 individuals (4). The Old World monkeys weighs up to 30 kg and they can grow 1 m long. Old World monkeys can survive up to 25 years (3). Old World monkeys have a longer life span than the New World monkeys. Old World monkeys are more colourful than the New World monkeys.

Reference:

1. Wikipedia contributors. Old World monkeys [internet]. Wikipedia, The Free Encyclopaedia; 2006 May 11, 18:58 PTA [cited 2006 May 12]. Available from: http://en.wikipedia.org/wiki/Old_World_monkey
2. Wikipedia contributors. New World monkeys [internet]. Wikipedia, The Free Encyclopaedia; 2006 May 7, 15:12 PTA [cited 2006 May 12]. Available from: http://en.wikipedia.org/wiki/New_World_monkey
3. Wikipedia contributors. Mandrill [internet]. Wikipedia, The Free Encyclopaedia; 2006 May 8, 01:47 PTA [cited 2006 May 12]. Available from: http://en.wikipedia.org/wiki/Mandrill
4. Wikipedia contributors. Howler monkeys [internet]. Wikipedia, The Free Encyclopaedia; 2006 May 9, 00:44 PTA [cited 2006 May 12]. Available from: http://en.wikipedia.org/wiki/Howler_monkey

Lethabo Mosomane
CSIR
Pretoria
0001
Tel: 27 12 841 2133
Fax: 27 12 842 3676
mail: lmosomane@csir.co.za
http://lmosomane.blogspot.com

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