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New avian ichnogenus from Mongolia

From: Ben Creisler

A new online paper:

Martin G. Lockley, Jianjun Li, Masaki Matsukawa, & Rihui Li (2011)
Cretaceous Research (advance online publication)

The new bird track Tatarornipes chabuensis ichnogen et. ichnosp nov. is
described from the Lower Cretaceous Jingchuan Formation of Inner Mongolia.
This ichnospecies is abundant in the well-studied Chabu area of central
Inner Mongolia (Nei Mongol). In addition to the type locality (Chabu site
4), large samples are known from Chabu sites 1, 5 and 15, and the
ichnogenus also occurs in the Cretaceous of Shandong Province. More than 50
well-preserved, measured tracks and representative trackways from five
samples are illustrated to show diagnostic features and modifications
attributable to preservation. The ichnospecies, which is characterized by
robust digits that are unusually wide proximally, is easily distinguished
from smaller Cretaceous avian ichnotaxa such as Koreanaornis and
Aquatilavipes, which are smaller and more gracile in appearance.
Tatarornipes also reveals a distinctive trackway pattern often
characterized by long steps and minimal pes rotation. This ichnogenus is
typically found in fluvio-lacustrine settings in association with
saurischian (theropod and sauropod) dominated footprint assemblages.

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