By Group‎ > ‎Choristodera‎ > ‎

Monjurosuchus splendens

The first tetrapod to be reported from the famous Yixian Formation (the holotype has been discovered in the 1930s and described in a 1940 paper) that later yields a number of feathered dinosaurs, the little lizard-like aquatic reptile Monjurosuchus remained an enigma until recently. It was successively classified as a Pseudosuchian, a Rhynchocephalian until the description of new specimen placed it confidently as a basal Choristodera. Only one species, M. splendens, has been described but some remains from Japan have been referred to the genus.


Monjurosuchus splendens


Endo, 1940

Meaning of the generic name

 Meaning of the specific name


Skull length: 5 cm, Length: 40 cm


Holotype (NMM3671): Lost during WWII
Neotype (GMV 2167): nearly complete skeleton.
Referred specimens: IVPP V13273, 13279, 13866, 14269, small juvenile individuals; IVPP V3673, sub−adult individual with skin impressions (originally attributed to Rhynchosaurus orientalis by Endo and Shikama, 1942); DR0003C, complete adult individual; BMNHC V073, nearly complete skeleton.

Age and Distribution

Horizon: Yixian Formation. Early Cretaceous (Barremian).

Type locality: Tananku, near Lingyun, Liaoning, China. Also: Niuyingzi,
Lingyuan, Liaoning, China (neotype locality), Toutai, north of Yizhou, Liaoning, China (BMNHC V073).


Diaspida Choristodera Monjurosuchidae

  Further Reading

  Endo, R. 1940. A new genus of Thecodontia from the Lycoptera beds in Manchoukou. Bulletin of the National Central Museum of Manchoukou 2: 1–14.

Endo, R. and Shikama, T. 1942. Mesozoic reptilian fauna in the Jehol mountainland, Manchoukuo. Bulletin of the Central National Museum of Manchoukuo 3: 1–19.

K.-Q. Gao and Q. Li. 2007. Osteology of Monjurosuchus splendens (Diapsida: Choristodera) based on a new specimen from the Lower Cretaceous of western Liaoning, China. Cretaceous Research 28:261-271.

  Synonyms   Rhynchosaurus orientalis Endo and Shikama, 1942

Skeleton of Monjurosuchus splendens (BMNHC V073). From Gao & Li, 2007.