Analong
Named for the village of A'na in Yunnan, China, where the fossils were discovered.
Middle Jurassic stages
Analong is an extinct genus of mamenchisaurid sauropod from the Chuanjie Formation in Yunnan, China. The type and only species is Analong chuanjieensis.
Diagnosis
- Caudal transverse processes persisting only until the 10th caudal vertebra (autapomorphy)
- Angle between ulnar anterolateral and anteromedial processes approximately 45 degrees (autapomorphy)
- Proximal width of metacarpal II is 7% the length of the radius, the lowest value among mamenchisaurids (autapomorphy)
- Distal width approximately 40% of the total length of the pubis, the greatest value among mamenchisaurids (autapomorphy)
- Weakly developed posterior condylar ball in anterior caudal vertebrae
- Ulnar proximal condylar processes sub-equal in length
Species
Analong chuanjieensis Ren et al., 2020
Type species
Named for the town of Chuanjie in Lufeng County, Yunnan, China, where the fossils were unearthed.
- Holotype
- LFGT LCD 9701-1 , Bureau of Natural Resources of Lufeng County (formerly Bureau of Land and Resources of Lufeng County)
- Material
- 11 articulated cervical vertebrae (axis-cervical 12), 8 middle-posterior dorsal vertebrae, 4-5 sacral vertebrae, first 24 caudal vertebrae, chevrons, some dorsal ribs, pubes, left humerus, ulna, radius, metacarpals, ilium, and femur.
- Horizon
- lower Chuanjie Formation, Bajocian, Middle Jurassic , 170.9–168.2 million years ago
- Locality
- Laochangqing, Yunnan, China
References
- Ren, X. X.; Sekiya, T.; Wang, T.; Yang, Z. W.; You, H. L. (2020). A revision of the referred specimen of Chuanjiesaurus anaensis Fang et al., 2000: a new early branching mamenchisaurid sauropod from the Middle Jurassic of China. Historical Biology 33(9): 1872-1887. Informa UK Limited. doi:10.1080/08912963.2020.1747450 ren2020a
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Jones, B. (2026). The Princeton Encyclopedia of Dinosaurs: Sauropods. Princeton University Press.
Source of the body length, mass, and hip height estimates.
jones2026b