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Re: Platypuses may be older than we think...

Tim Williams writes:

Yep, Rowe &c refer to _Teinolophos_ as a "basal platypus", so perhaps we could substitute "platypodan". _Teinolophos_, _Steropodon_, and _Kollikodon_ would all be "basal platypodans". Tachyglossans, AFAIK, are known only from the crown-group.

It depends on exactly what *Kryoryctes cadburyi* was. I've found at least one phylogeny that places it within Tachyglossa:

http://www.fmnh.helsinki.fi/users/haaramo/metazoa/Deuterostoma/Chordata/Syna psida/Basal_Mammalia/Prototheria.htm

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Dann Pigdon
GIS / Archaeologist              geo cities.com/dannsdinosaurs
Melbourne, Australia             heretichides.soffiles.com
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