What is a Species?

  • Bernard Marcus
Part of the SpringerBriefs in Evolutionary Biology book series (BRIEFSEVOLUTION)


A number of years ago, I had a student who was convinced that she had a pet that was half cat and half rabbit. She was certain that her pet had a parent of each species, and when I could not convince her that was impossible, I challenged her to bring the animal in so I could have a look at it. As it turned out, the animal was a variety of stub-tailed cat known as a Manx, which we will talk about in the following chapter. I offered to open it up and show her that its internal anatomy was all cat, but she declined, ostensibly, at any rate, accepting my argument.


Rainbow Trout Separate Species Cutthroat Trout Canis Lupus Familiaris Gila Trout 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. IJdo JW, Baldini A, Ward DC, Reeders ST, Wells RA (1991) Origin of human chromosome 2: an ancestral telomere–telomere fusion. Proc Natl Acad Sci U S A 88:9051–9055PubMedCrossRefGoogle Scholar

Copyright information

© The Author(s) 2012

Authors and Affiliations

  • Bernard Marcus
    • 1
  1. 1.Genesee Community CollegeUSA

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