[Taxacom] Reproducibility of descriptive data

[Mary Barkworth]

So how often do they have to interbreed and produce how fertile an
offspring? And what if the isolating mechanism is the Atlantic Ocean -
only then some foolish biped comes along, brings two things together
than were once very effectively isolated by the ocean and find they are
interfertile! Does that negate the impact of the accumulation of other
genetic differences between them? 
Mary