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Re: on-line fossil birds list

Scansoriopterygidae, Epidendrosaurus (Early Cretaceous)

Might be Middle or Late Jurassic; this hinges on the age of the Daohugou Bed.

Which is... drum roll... Early Cretaceous. It lies below the Yixian Fm, but above the Tuchengzi Fm. A radiometric date from "the upper part" of the latter is very close to the Berriasian-Valanginian boundary, so the Daohugou Bed could be anything from Valanginian to Barremian in age. I posted on this last summer.