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Re: A Jurassic 'beaver'



>>Interestingly, however, the beastie is a docodont! If it is EK, that makes
it the youngest known docodont in the world by some 20 million years.>>

Oh no it wouldn't  (unless somebodys been redating bits of Siberia).
/Sibirotherium/ from Shetakovo 1 is a docodont.  The last I hear, the age is
anything from Berriasian-Albian, but it's certainly Lower K.  Indeterminate
docodont material has also been reported from the Aptian-Albian of Höövör
and apparently the Lower Cretaceous of the Central Colorado Plateau.  We
would also sensibly be ignoring /Reigitherium/ from the Upper Cretaceous of
Patagonia, which appears to be morphing back into a dryolestoid.

(The Höövör material is mentioned by Averianov AO & Skutschas P (2000), A
eutherian mammal from the Early Cretaceous of Russia and biostratigraphy of
the Asian Early Cretaceous vertebrate assemblages. Lethaia 33(4), p.330-340.
It's on page 340.)

/Castorocauda/ must be the Chinese docodont, which made a recent unnamed
guest appearance in Hurum JH, Luo Z-X & Kielan-Jaworowska (2006), Were
mammals originally venomous?, Acta Palaeontologica Polonica, 51(1), p.1-11.
The ankle is equipped with the required tarsal spur.
Cheers
Trevor

Woutersiisdae and Docodonta, an internet directory
http://home.arcor.de/ktdykes/doctridon.htm
The Mesozoic - more than just the dinosaur