Yuanyanglong, new oviraptorosaur from Lower Cretaceous of Inner Mongolia, China
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Ben Creisler
Oct 24, 2024, 6:14:26 PMOct 24
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Ben Creisler
A new paper:
Yuanyanglong bainian gen. et sp. nov.
Mingze Hao, Zhiyu Li, Zhili Wang, Shuqiong Wang, Feimin Ma, Qinggele, J. Logan King, Rui Pei, Qi Zhao & Xing Xu (2024)
A new oviraptorosaur from the Lower Cretaceous Miaogou Formation of western Inner Mongolia, China
Cretaceous Research 106023
doi: https://doi.org/10.1016/j.cretres.2024.106023
https://www.sciencedirect.com/science/article/abs/pii/S0195667124001964
Highlights
New oviraptorosaurian Yuanyanglong bainian from the Early Cretaceous Maortu, China
Early-diverging oviraptorosaur taxon showing mosaic body plan
Enigmatic combination of pelvic and hindlimb features similar to extant wading birds
Gastroliths reveal potential discrepancy of digestion mode of oviraptorosaurs
Abstract
A new oviraptorosaur, Yuanyanglong bainian gen. et sp. nov. is described based on two specimens recovered from the Lower Cretaceous Miaogou Formation of the Maortu locality in Chilantai, Inner Mongolia, China. This new species is intermediate in morphology between the earliest-diverging and late-diverging oviraptorosaurs, and our phylogenetic analysis supports it as a sister taxon to the clade formed by Avimimidae and Caenagathoidea. Notably, this new early-diverging oviraptorosaur has an ilium with an extremely short postacetabular process and hindlimbs with proportionally elongate and fused lower segments, a character combination unknown among other oviraptorosaurs but common in wading birds, suggesting a potential ecology involving wading. Preserved gastroliths similar to Caudipteryx suggest a gastric mill function in our new species, and our preliminary observations indicate potential discrepancies in the digestion mode of early- and late-diverging oviraptorosaurs.
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Yuanyanglong bainian gen. et sp. nov.
Mingze Hao, Zhiyu Li, Zhili Wang, Shuqiong Wang, Feimin Ma, Qinggele, J. Logan King, Rui Pei, Qi Zhao & Xing Xu (2024)
A new oviraptorosaur from the Lower Cretaceous Miaogou Formation of western Inner Mongolia, China
Cretaceous Research 106023
doi: https://doi.org/10.1016/j.cretres.2024.106023
https://www.sciencedirect.com/science/article/abs/pii/S0195667124001964
Highlights
New oviraptorosaurian Yuanyanglong bainian from the Early Cretaceous Maortu, China
Early-diverging oviraptorosaur taxon showing mosaic body plan
Enigmatic combination of pelvic and hindlimb features similar to extant wading birds
Gastroliths reveal potential discrepancy of digestion mode of oviraptorosaurs
Abstract
A new oviraptorosaur, Yuanyanglong bainian gen. et sp. nov. is described based on two specimens recovered from the Lower Cretaceous Miaogou Formation of the Maortu locality in Chilantai, Inner Mongolia, China. This new species is intermediate in morphology between the earliest-diverging and late-diverging oviraptorosaurs, and our phylogenetic analysis supports it as a sister taxon to the clade formed by Avimimidae and Caenagathoidea. Notably, this new early-diverging oviraptorosaur has an ilium with an extremely short postacetabular process and hindlimbs with proportionally elongate and fused lower segments, a character combination unknown among other oviraptorosaurs but common in wading birds, suggesting a potential ecology involving wading. Preserved gastroliths similar to Caudipteryx suggest a gastric mill function in our new species, and our preliminary observations indicate potential discrepancies in the digestion mode of early- and late-diverging oviraptorosaurs.
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