A new mamenchisaurid from the Upper Jurassic Suining Formation of the Sichuan Basin in China and its implication on sauropod gigantism
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View abstract on PubMed
Summary
This summary is machine-generated.A new gigantic sauropod dinosaur, Tongnanlong zhimingi, was discovered in China's Sichuan Basin. This Upper Jurassic mamenchisaurid, estimated at 25-26m, enriches dinosaur diversity and evolution understanding.
Area Of Science
- Paleontology
- Vertebrate Paleontology
- Mesozoic Era Research
Background
- The Sichuan Basin is a rich source of Middle-Late Jurassic sauropod dinosaurs.
- Mamenchisauridae dominated the Late Jurassic dinosaur fauna in the Sichuan Basin.
Purpose Of The Study
- To describe a new sauropod dinosaur species, Tongnanlong zhimingi gen. et sp. nov.
- To analyze its phylogenetic relationships and anatomical features.
Main Methods
- Description of fossil remains: three dorsal and six caudal vertebrae, scapula, coracoid, and hindlimb bones.
- Comparative anatomical analysis with other mamenchisaurids.
- Phylogenetic analysis to determine evolutionary relationships.
Main Results
- Tongnanlong zhimingi is diagnosed by complex structures in its dorsal and anterior caudal vertebrae.
- Phylogenetic analysis places it closer to Mamenchisaurus than Omeisaurus.
- The gigantic scapula and coracoid suggest an individual length of approximately 25–26 meters.
Conclusions
- Tongnanlong zhimingi represents a new genus and species of mamenchisaurid sauropod.
- This discovery expands the known diversity within Mamenchisauridae.
- It provides valuable insights into the evolution and diversity of eusauropod dinosaurs.
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