Re: Nature: Pseudo-tribosphenic vs tribosphenic mammals

[David Marjanovic <david.marjanovic@gmx.at>]

> Though I'm not absolutely certain that they came from the same beds -

They do.

> The _Pseudotribos_ paper maintains a Middle Jurassic date for this 
> formation

...which is still doubly wrong: the Daohugou beds are above the Jiulongshan 
Fm, not part of it, _and_ the Jiulongshan Fm lies above, not below, the 
volcanic layer that dates to the Middle-Late Jurassic boundary. The whole 
area, which consists of a roller-coaster landscape 1000 m above sea level, 
is so wildly folded that it really is possible to confuse above and below. 
References tomorrow... erm... later today; all have been mentioned onlist 
several times.