Sinankylosaurus

Sinankylosaurus (meaning "Chinese fused lizard") is a dubious genus of dinosaurs, originally described as an ankylosaur, from the Late Cretaceous Hongtuya Formation of Shandong, China. The genus contains a single species, Sinankylosaurus zhuchengensis, known from a nearly complete right ilium.

Sinankylosaurus Temporal range: Late Cretaceous (Campanian), ~77.3–73.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Clade:	incertae sedis
Genus:	†Sinankylosaurus Wang et al., 2020
Species:	†S. zhuchengensis
Binomial name
†Sinankylosaurus zhuchengensis Wang et al., 2020

Discovery and naming

The holotype specimen, ZJZ-183, was discovered in the Hongtuya Formation (Wangshi Group) in Zhucheng, Shandong Province, China. The fossil, a partial right ilium, was described in 2020 as belonging to an ankylosaur of uncertain affinities.^[1]

In a 2021 publication, Zheng et al. deemed Sinankylosaurus a nomen dubium with no anatomical characters uniting it with the Ankylosauria.^[2]

Paleoecology

Sinankylosaurus is known from the Hongtuya Formation, part of the Wangshi Group of southern China. Other dinosaurs from this group include ceratopsians (Ischioceratops, Sinoceratops, and Zhuchengceratops), the large hadrosaurid Shantungosaurus, the titanosaur Zhuchengtitan, the tyrannosaurid Zhuchengtyrannus, and the oviraptorosaur Anomalipes.^[1]