[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
But if you don't have a coherent idea of how to define a
>species the issue is moot. Two groups of fish with different chromosome
>counts are certainly different species.
I'm not I would say this is true. My specialty is plant
biochemistry/physiology and my work specializes in orchids. There are many
instances where the same species of orchid can vary in chromosome count,
especially from region to region or maybe more importantly bioclime to
bioclime. I'm not a systemist by any means but I just published a paper
defining evolution of oncidium orchids by chromosome count (it was taken by
many as an attack on systematics). Regardless of chromosome number they
interbred and those species with the different numbers were define
taxinomically through molecular systematics.
My point is, I have seen it first hand where identical species have varying
chromosome numbers and would like to know if the same is true for killies,
especially between the gardneri types.