| 词条 | Liaoningotitan |
| 释义 |
| name = Liaoningotitan | fossil_range = {{fossilrange|Barremian}} | display_parents = 2 | genus = Liaoningotitan | parent_authority = Zhou et al., 2018 | species = sinensis | authority = Zhou et al., 2018 }}Liaoningotitan is a genus of titanosauriform sauropod from the Early Cretaceous (Barremian) Yixian Formation in Liaoning, China.[1] DescriptionDistinguishing features of Liaoningotitan include a ventral margin of the maxilla that is convex, a 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] ClassificationZhou et al. (2018) recover Liaoningotitan as a somphospondylan titanosauriform more derived than Euhelopus.[1] PaleoecologyLiaoningotitan 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]References1. ^1 2 3 {{cite journal|first=C.-F. |last=Zhou |first2=W.-H. |last2=Wu |first3=T. |last3=Sekiya |first4=Z.-M. |last4=Dong |year=2018 |title=A new Titanosauriformes dinosaur from Jehol Biota of western Liaoning, China |journal=Global Geology |volume=37 |issue=2 |page=327–333 |doi=10.3969/j.issn.1004-5589.2018.02.001}} 3 : Macronarians|Cretaceous dinosaurs of Asia|Fossil taxa described in 2018 |
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