Open Paleo

Monkonosaurus

Dong, 1990 MONG-kon-o-SAWR-us Nomen dubium

Named for Markam County (also known as Monko), the region of Tibet where the holotype was found, combined with Greek 'sauros' meaning 'lizard'.

154.8–125.8 million years ago Kimmeridgian–Hauterivian, Late Jurassic–Early Cretaceous
Late Jurassic and Early Cretaceous stages

Monkonosaurus is a dubious genus of stegosaurian dinosaur from the Loe-ein Formation of eastern Tibet, of uncertain Late Jurassic to Early Cretaceous age. The type species is Monkonosaurus lawulacus.

Species

Monkonosaurus lawulacus Dong, 1990 Nomen dubium

Type species

Named for the Lawushan (Lawu mountains) in Tibet, the region where the holotype was found.

Holotype
Not catalogued , Institute of Vertebrate Paleontology and Paleoanthropology (uncatalogued)
Material
Two partial vertebrae, three dermal plates, and a complete ilio-sacral block.
Notes
The holotype was never assigned a catalog number. Only the ilio-sacral block has been relocated at the IVPP, damaged since it was figured by Dong (1990); the whereabouts of the vertebrae and dermal plates are unknown.
Horizon
Loe-ein Formation, Kimmeridgian–Hauterivian, Late Jurassic–Early Cretaceous , 154.8–125.8 million years ago
Locality
Lawulashan, Tibet Autonomous Region, China

References

  1. Zhao, X. (1983). Phylogeny and evolutionary stages of Dinosauria. Acta Palaeontologica Polonica 28(1-2): 295-306.

    Names the genus Monkonosaurus without a species or description, a nomen nudum.

    zhao1983a
  2. Zhao, X. (1986). [Reptiles]. Ching-kuo Ti Pao o Hsi [The Cretaceous System of China. The Stratigraphy of China] 12: 67-73. Geological Publishing House.

    Credited by Olshevsky (1991) with the binomial Monkonosaurus lawulacus, a nomen nudum; Dong (1990) instead credits the binomial to Zhao (1983), which gives only the genus.

    zhao1986a
  3. Olshevsky, G. (1991). A revision of the parainfraclass Archosauria Cope, 1869, excluding the advanced Crocodylia. Mesozoic Meanderings 2: 1-196.

    Lists Monkonosaurus Zhao, 1983 and M. lawulacus Zhao, 1986 as nomina nuda, made available by Dong (1990).

    olshevsky1991a
  4. Dong, Z. (1990). Stegosaurs of Asia. Dinosaur Systematics: Perspectives and Approaches (Carpenter, K.; Currie, P. J., eds.) 255-268. Cambridge University Press, Cambridge.

    First described the holotype, making the name available; the authorship is Monkonosaurus lawulacus Zhao in Dong, 1990.

    dong1990b
  5. Maidment, S. C. R.; Wei, G. (2006). A review of the Late Jurassic stegosaurs (Dinosauria, Stegosauria) from the People's Republic of China. Geological Magazine 143(5): 621-634. Cambridge University Press (CUP). doi:10.1017/s0016756806002500

    Reviewed the holotype, rejected each of the original diagnostic characters, and treated Monkonosaurus lawulacus as a nomen dubium.

    maidment2006a
  6. Maidment, S. C. R.; Norman, D. B.; Barrett, P. M.; Upchurch, P. (2008). Systematics and phylogeny of Stegosauria (Dinosauria: Ornithischia). Journal of Systematic Palaeontology 6(4): 367-407. Informa UK Limited. doi:10.1017/S1477201908002459

    Maintained Monkonosaurus lawulacus as a nomen dubium and listed the IVPP ilio-sacral block as Stegosauria indet.

    maidment2008a