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Re: Species numbers

Maybe this article (although a bit old one) could helps:

Richard R. Strathmann and Montgomery Slatkin
The Improbability of Animal Phyla with Few Species
Paleobiology, Vol. 9, No. 2 (Spring, 1983), pp. 97-106


Roberto Takata

On Fri, Aug 8, 2008 at 2:06 AM, Mikko K. Haaramo
<mikko.haaramo@helsinki.fi> wrote:
> Hi All,
> Sorry about cross posting... :/
> Does anyone had in hand a list of number of described living genera/species
> per phylum?
> Have such a list about chordates, but have a need for other phyla also.
> I think I'll put that count in the Archive... :)
> Cheers!
> --Mikko Haaramo