Describer

You, Ji Q., Li & Li, 2003

Time

Cretaceous Early Cretaceous Late

Classification

Ornithischia Ornithopoda Hadrosauridae

Diet

Herbivore

Fossilsite

Sunjiawin Formation of Beipiao, Liaoning, China

Info

Genus - Typespecies

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. 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

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Carpenter & Ishida (2010) Early and “Middle” Cretaceous Iguanodonts in Time and Space Journal of Iberian Geology 36 (2) 145-164

Shuangmiaosaurus gilmorei You et al., 2003b

Locality

Shuangmiao Village, Beipiao County, Liaoning Provence, People’s Republic of China.

Horizon

Sunjiawan Formation.

Age

late Albian (Jiang and Sha, 2006; Sha, 2007).

Comments

The ilium is unknown.