What to think? My solution is this:I don't mean to say that Wilkins get the final word, but just that his categorizations is most germane to the topic. I, for one, (also) think that Ernst Mayr committed several blunders when emphasizing the Biological Species Concept. And the name itself was one of them. I'm the lone evolutionary biologist in a microbial lab a the moment, and we don't like not talking about different species of bacteria, for example. Sex is great, but not always for everybody.
There is one species concept (and it refers to real species).
There are two explanations of why real species are species (see my microbial paper, 2007): ecological adaptation and reproductive reach.
There are seven distinct definitions of “species”, and 27 variations and mixtures.
And there are n+1 definitions of “species” in a room of n biologists.
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