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Jurassic Daohugou Biota of Northeastern China dated (free pdf)

From: Ben Creisler

In the new issue of Journal of Vertebrate Paleontology (pdf is open access):

Corwin Sullivan, Yuan Wang, David W. E. Hone, Yuanqing Wang, Xing Xu &
Fucheng Zhang (2014)
The vertebrates of the Jurassic Daohugou Biota of Northeastern China.
Journal of Vertebrate Paleontology 34(2): 243-280

The Early Cretaceous Jehol Biota of northeastern China has become
famous over the last two decades as a source of feathered avialan and
non-avialan theropods, preserved alongside an array of other fossil
vertebrates, invertebrates, and plants. Still more recently, a rich
assemblage referred to in this paper as the Daohugou Biota has begun
to emerge from Jurassic strata in the same region. Like their
counterparts from the Jehol Biota, Daohugou Biota vertebrate specimens
are typically preserved in fine-grained lacustrine beds and often
retain feathers and other soft-tissue features. At present, 30
vertebrate taxa (five salamanders, one anuran, two lizards, 13
pterosaurs, five dinosaurs, and four mammals) are known from the
Daohugou Biota, which was first recognized at the Daohugou locality in
Inner Mongolia. The presence of the salamander Chunerpeton
tianyiensis, proposed in this paper as an index fossil for the
Daohugou Biota, links the Daohugou locality to five other
fossil-producing areas in the provinces of Hebei and Liaoning. The
strata containing the Daohugou Biota are close to the Middle-Upper
Jurassic boundary and belong at least partly to the regionally
widespread Tiaojishan Formation. In general, the vertebrate fauna of
the Daohugou Biota is strikingly different from that of the Jehol
Biota, although paravian dinosaurs, anurognathid pterosaurs, and
salamanders with cryptobranchid and hynobiid affinities occur in both.
Nevertheless, the Daohugou Biota and the Jehol Biota are two
successive Lagerstätte assemblages that collectively offer a
taphonomically consistent window into the Mesozoic life of northeast
Asia over a significant span of geologic time.

See also Dave Hone's blog article: