Liaoningotitan

Liaoningotitan (meaning "Liaoning giant") is a genus of titanosauriform sauropod from the Early Cretaceous (Barremian) Yixian Formation in Liaoning, China.[1]

Liaoningotitan
Temporal range: Early Cretaceous, Barremian
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Scientific classification
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Suborder: †Sauropodomorpha
Clade: †Sauropoda
Clade: †Somphospondyli
Genus: †Liaoningotitan
Zhou et al., 2018
Species:
†L. sinensis
Binomial name
†Liaoningotitan sinensis
Zhou et al., 2018

Description

Distinguishing features of Liaoningotitan include a ventral margin of the maxilla that is convex, an upper tooth row that is short and anteriorly positioned; an anterior extension of the jugal that nearly reaches the level of the anterior margin of the antorbital fenestra; a basally constricted quadrate wing of the pterygoid; imbricated upper teeth, with narrow spatulate crowns that are D-shaped in cross section, and no labial grooves or denticles; nine reduced and un-imbricated lower teeth; asymmetric lower tooth crowns which are elliptical-like in cross section, with lingual grooves and ridges and a lingually bulbous basal crown; a proximal expansion of the humerus that is about 54.9% the length of the humerus; and an ilium with a pointed preacetabular process.[1]

Classification

Zhou et al. (2018) recover Liaoningotitan as a somphospondylan titanosauriform more derived than Euhelopus.[1]

Paleoecology

Liaoningotitan is one of two titanosauriforms from the Yixian Formation of Liaoning, the other being Dongbeititan. These two forms co-existed with feathered dinosaurs in the Early Cretaceous lacustrine environment of present-day Liaoning.[1]

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References
  1. Zhou, C.-F.; Wu, W.-H.; Sekiya, T.; Dong, Z.-M. (2018). "A new Titanosauriformes dinosaur from Jehol Biota of western Liaoning, China". Global Geology. 37 (2): 327–333. doi:10.3969/j.issn.1004-5589.2018.02.001.
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