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Re: Nature: Pseudo-tribosphenic vs tribosphenic mammals

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.