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- Title
A new basal eusauropod from the Middle Jurassic of Yunnan, China, and faunal compositions and transitions of Asian sauropodomorph dinosaurs.
- Authors
LIDA XING; TETSUTO MIYASHITA; CURRIE, PHILIP J.; HAILU YOU; JIANPING ZHANG; ZHIMING DONG
- Abstract
Many sauropod ghost lineages cross the Middle Jurassic, indicating a time interval that requires increased sampling. A wide taxonomic spectrum of sauropodomorphs is known from the Middle Jurassic of China, but the braincase of a new sauropod, named here Nebulasaurus taito gen. et sp. nov., is distinct. Nebulasaurus is sister taxon to Spinophorosaurus from the Middle Jurassic of Africa and represents a clade of basal eusauropods previously unknown from Asia. The revised faunal list indicates dramatic transitions in sauropodomorph faunas from the Jurassic to Cretaceous of Asia; these are consistent with geographic isolation of Asia through the Late Jurassic. Non-sauropod sauropodomorphs, non-mamenchisaurid eusauropods (including basal macronarians), and mamenchisaurids successively replaced previous grades through the Jurassic, and titanosauriforms excluded all other sauropod lineages across the Jurassic--Cretaceous boundary.
- Subjects
YUNNAN Sheng (China); JURASSIC Period; MESOZOIC Era; SAUROPODOMORPHA; SAURISCHIA
- Publication
Acta Palaeontologica Polonica, 2015, Vol 60, Issue 1, p145
- ISSN
0567-7920
- Publication type
Article
- DOI
10.4202/app.2012.0151