"Tanius" laiyangensis

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"Tanius" laiyangensis
Temporal range: Late Cretaceous, 72–70 Ma
Scientific classification
†"T." laiyangensis
Binomial name
"Tanius" laiyangensis
Zhen, 1976

"Tanius" laiyangensis is a dubious species of kritosaurin hadrosaur from the Late Cretaceous Wangshi Group of Shandong, China. It was originally described in 1976 as the third species in the genus Tanius, based on a sacrum and partial ilium.[1] The type species of the genus, Tanius sinensis, was later found to be a basal hadrosauroid as opposed to be a member of Hadrosauridae.[2] T. laiyangensis was, after its description, variously considered a nomen dubium or a synonym of the lambeosaur Tsintaosaurus.[3][4] In 2019, T. laiyangensis was re-evaluated, and found to be an indeterminate kritosaur, unrelated to the true Tanius. Material from the same formation, initially referred to the edmontosaur Laiyangosaurus, was also identified as being from a kritosaur, and so possibly belonged to the same species. It is the first recognized kritosaur to be found in Asia, and its closest relative was found to be Secernosaurus from Argentina.[5]


  1. ^ Zhen, S., 1976, "A new species of hadrosaur from Shandong". Vertebrata PalAsiatica, 14(3): 166-169
  2. ^ Borinder, N.H. (2015). "Postcranial Anatomy of Tanius Sinensis Wiman, 1929 (Dinosauria; Hadrosauroidea)" (PDF). Examensarbete vid Institutionen för geovetenskaper. Upsala University. ISSN 1650-6553.
  3. ^ Zhang, J.L.; Wang, Q; Jiang, S.X.; Cheng, X.; Li, N.; Qiu, R.; Zhang, X.J.; Wang, X.L. (2017). "Review of historical and current research on the Late Cretaceous dinosaurs and dinosaur eggs from Laiyang, Shandong" (PDF). Vertebrata PalAsiatica. 55 (2): 187–200.
  4. ^ Buffetaut, E. and Tong-Buffetaut, H., 1993. "Tsintaosaurus spinorhinus YOUNG and Tanius sinensis WIMAN: a preliminary comparative study of two hadrosaurs (Dinosauria) from the Upper Cretaceous of China", C.R. Academy of Science Paris, series 2, 317: 1255-1261
  5. ^ Zhang, Yu-Guang; Wang, Ke-Bai; Chen, Shu-Qing; Liu, Di; Xing, Hai (2019). "Osteological Re‐assessment and Taxonomic Revision of "Tanius laiyangensis" (Ornithischia: Hadrosauroidea) from the Upper Cretaceous of Shandong, China". The Anatomical Record. doi:10.1002/ar.24097.