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The Father of zoology and great Greek philospher Aristotle (384-322 B.C.) divided the animals into two main groups.
#1. Anaima:
Animals without red blood comprise this group, which is further subdivided into five sub-groups:
a. Sponges and Coelenterata
b. Insects and Spiders
c. Crustacea
d. Cephalopoda
e. Mollusca and Echinodermata.
#2. Enaimas:
Animals with red blood comprise this group, which is further subdivided into two sub-groups:
a. Vivipara: Viviparous animals.
b. Ovipara: Oviparous animals.
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Aristotle's classification of animals grouped together animals with similar characters into genera and then distinguished the species within the genera. He also divided animals in a 2-group and 3-group system. The 2 group system was blood and bloodless and the three group system was in terms of their movement: walking, flying and swimming (land, air or water). As can be seen such a system is too simple to classify the amount of animals we have today and so Aristotle's system became less useful. Just think for a moment, with a system so simple how would the millions of microorganisms found today be classified? By: A 2007 UWI Student Aristotle's classification of animals grouped together animals with similar characters into genera and then distinguished the species within the genera. He also divided animals in a 2-group and 3-group system. The 2 group system was blood and bloodless and the three group system was in terms of their movement: walking, flying and swimming (land, air or water). As can be seen such a system is too simple to classify the amount of animals we have today and so Aristotle's system became less useful. Just think for a moment, with a system so simple how would the millions of microorganisms found today be classified? By: A 2007 UWI Student
Why did Aristotle's classifications system become less useful?
Aristotle's classification of animals grouped together animals with similar characters into genera and then distinguished the species within the genera. He also divided animals in a 2-group and 3-group system. The 2 group system was blood and bloodless and the three group system was in terms of their movement: walking, flying and swimming (land, air or water). As can be seen such a system is too simple to classify the amount of animals we have today and so Aristotle's system became less useful. Just think for a moment, with a system so simple how would the millions of microorganisms found today be classified? By: A 2007 UWI Student Aristotle's classification of animals grouped together animals with similar characters into genera and then distinguished the species within the genera. He also divided animals in a 2-group and 3-group system. The 2 group system was blood and bloodless and the three group system was in terms of their movement: walking, flying and swimming (land, air or water). As can be seen such a system is too simple to classify the amount of animals we have today and so Aristotle's system became less useful. Just think for a moment, with a system so simple how would the millions of microorganisms found today be classified? By: A 2007 UWI Student
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