简介(Brief Introduction)

[A]英文版：A new hadrosauroid dinosaur, Shuangmiaosaurus gilmorei gen. et sp. nov., is described based on a complete left maxilla with articulated premaxilla and lacrimal fragments, and a complete left dentary from the mid-Cretaceous Sunjiawan Formation of Beipiao City, Liaoning Province, northeast China. Cladistic analysis shows that Shuangmiaosaurus is a basal hadrosauroid, and comprises the sister taxon to Hadrosauridae. In both Shuangmiaosaurus and Hadrosauridae, the maxilla-jugal suture is butt-jointed, rather than finger-in-recess articulation as in other basal hadrosauroids. However, Shuangmiaosaurus does not possess such hadrosaurid synapomorphies as the diamond-shaped maxillary crowns with reduced primary ridges and reduced marginal denticles.

You, H.-L., Q. Ji, J.-L. Li, and Y.-X. Li. 2003. A new hadrosauroid dinosaur from the mid-Cretaceous of Liaoning Province, P. R. China. Acta Geologica Sinica (English Edition) 77(2): 148-154.

IVPP V12745: Partial dentary w/ teeth Hypodigm APK:5/5: IVPP V12746-2 dorsal vertebra and LPM 101-1–4 postcrania, in addition to holotype specimen 

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