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Yanbeilong

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(Redirected from Yanbeilong ultimus) Genus of stegosaurian dinosaurs

Yanbeilong
Temporal range: Early Cretaceous, Albian PreꞒ O S D C P T J K Pg N
Skeletal reconstruction
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Ornithischia
Clade: Thyreophora
Clade: Stegosauria
Family: Stegosauridae
Genus: Yanbeilong
Jia et al., 2024
Species: Y. ultimus
Binomial name
Yanbeilong ultimus
Jia et al., 2024

Yanbeilong (meaning "north of Yanmen Pass dragon") is an extinct genus of stegosaurian dinosaur from the Early Cretaceous (Albian) Zuoyun Formation of Shanxi, China. The type and only species is Y. ultimus. It is considered one of the youngest definitive records of the group, alongside Mongolostegus from Mongolia and possible Stegosaurus remains from the Hekou Group of China, both of which date to the AptianAlbian.

Discovery and naming

Yanbeilong is located in ChinaYanbeilongclass=notpageimage| Map of China with Zuoyun County indicated (near the Yanbeilong type locality)
Speculative life restoration

The Yanbeilong holotype specimen, SXMG V 00006, was discovered in 2011 in sediments of the Zuoyun Formation near Madaotou Township in Zuoyun County of Datong City, Shanxi Province, China. The specimen consists of the sacrum, both ilia, the left ischium, right pubis, seven dorsal vertebrae (two of which were isolated, the other five found in association with the ilio-sacral block), and a caudal vertebra.

In 2024, Jia et al. described Yanbeilong ultimus as a new genus and species of stegosaur based on these fossil remains. The generic name, "Yanbeilong", combines the Chinese "Yanbei", meaning "North of Yanmen Pass"—referencing the general area of the type locality—and "long", meaning "dragon". The specific name, "ultimus", is a Latin word meaning "last", referencing the fact that this taxon represents a late-surviving member of the stegosaur lineage.

Classification

Jia et al. (2024) recovered Yanbeilong as a deeply-nested member of the Stegosauria, as the sister taxon to a clade containing Stegosaurus stenops and Wuerhosaurus. The results of their phylogenetic analyses are shown in the cladogram below:

Stegosauria
Bashanosaurus
Chungkingosaurus
Huayangosaurus
Isaberrysaura
Gigantspinosaurus
Alcovasaurus
Jiangjunosaurus
Tuojiangosaurus
Paranthodon
Kentrosaurus
Adratiklit
Dacentrurus
Hesperosaurus
Miragaia
Loricatosaurus

Yanbeilong

Wuerhosaurus
Stegosaurus stenops

References

  1. ^ Jia, Lei; Li, Ning; Dong, Liyang; Shi, Jianru; Kang, Zhishuai; Wang, Suozhu; Xu, Shichao; You, Hailu (2024-01-31). "A new stegosaur from the late Early Cretaceous of Zuoyun, Shanxi Province, China". Historical Biology: 1–10. doi:10.1080/08912963.2024.2308214. ISSN 0891-2963.
  2. Tumanova, T. A.; Alifanov, V. R. (2018-12-01). "First Record of Stegosaur (Ornithischia, Dinosauria) from the Aptian–Albian of Mongolia". Paleontological Journal. 52 (14): 1771–1779. Bibcode:2018PalJ...52.1771T. doi:10.1134/S0031030118140186. ISSN 1555-6174. S2CID 91559457.
  3. Li, Ning; Li, Daqing; Peng, Guangzhao; You, Hailu (2024). "The first stegosaurian dinosaur from Gansu Province, China". Cretaceous Research. 158 (in press). 105852. Bibcode:2024CrRes.15805852L. doi:10.1016/j.cretres.2024.105852. S2CID 267286799.
  4. Dong, Liyang; Yi, Jian; Liu, Yingchao; Xu, Shichao; Wang, Suozhu; Zhang, Cai (2018-03-24). "山西左云地区下白垩统左云组沉积相及其古气候意义" [Sedimentary Facies of Lower Cretaceous Zuoyun Formation and Paleoclimate of Early Cretaceous]. Geological Review (in Chinese). 64 (2): 392–404. doi:10.16509/j.georeview.2018.02.007. ISSN 0371-5736.
Stegosauria
Avemetatarsalia
Ornithischia
Stegosauria
    • see below↓
Stegosauria
Stegosauria
Huayangosauridae
Stegosauridae
Dacentrurinae
Stegosaurinae
Stegosaurus stenops
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