Aristotle distinguished about 500 species of birds, mammals, actinopterygians and selachians in History of Animals and Parts of Animals. Aristotle distinguished animals with blood, Enhaima (the modern zoologist's vertebrates) and animals without blood, Anhaima (invertebrates).
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Aristotle's biology
Aristotle's biology is the theory of biology, grounded in systematic observation and collection of data, mainly zoological, embodied in Aristotle's books on the science. Wikipedia
Sep 7, 2007 · In fact, the essence of any species, according to Aristotle, consists in its genus and the differentia that together with that genus defines the ...
Feb 15, 2006 · Between the two of them they originated the science of biology, Aristotle carrying out a systematic investigation of animals, Theophrastus doing ...