In article <D2t2A5.627 at cix.compulink.co.uk>, colinc at cix.compulink.co.uk ("Colin Cracknell") writes:
> This may seem an odd place in which to ask a grammatical question, but
> which of the following is (are?) correct?
>
> 1) Diptera is a taxon.
> 2) Diptera are a taxon.
> 3) "Diptera" is a taxon.
>
None of the above
Answer: "Diptheria is a toxin"
:-)