In 1948 and 1949 Father Edgar Oehler, a Catholic priest working for the Fu Jen Catholic University at Beijing, excavated fossils near the village of Da Di in Yunnan. Among them was the jaw bone of a herbivorous dinosaur. In 1965 David Jay Simmons named and described it as the type speciesTatisaurus oehleri. The generic name is derived from Da Di, then more usually spelled as "Ta Ti". The specific name honours Oehler.[2] The holotype, FMNH CUP 2088, was found in the Zhangjiawa Beds of the Lufeng Formation, dating from the Sinemurian. It consists of a partial left mandible with teeth. The lower jaw bone fragment is, lacking the tip, six centimetres long. The teeth are eroded. It is the only specimen known of the species.
Simmons assigned Tatisaurus to the Hypsilophodontidae, though this group was seen by him as an evolutionary grade of "primitive" Ornithopoda, ancestral to several ornithischian groups. He felt that Tatisaurus' affinities were with Scelidosaurus or the Ankylosauria. Later, in 1990, the specimen was reviewed by Dong Zhiming, who noted it had similarities with Huayangosaurus. He placed the two genera in the same subfamily, the Huayangosaurinae, within the Stegosauria.[3]
Later still, in 1996, Spencer Lucas reclassified Tatisaurus oehleri as a species of Scelidosaurus, S. oehleri, in order to use Scelidosaurus for a biochron.[4] In 2007, David B. Norman and colleagues regarded this as unfounded. They instead found Tatisaurus to be a dubiousbasalthyreophoran, showing a single thyreophorean synapomorphy; a ventrally deflected mesial end of the dentary. If considered a thyreophoran, it would be one of the oldest known members of the group.[5]
In 2019 a study concluded that Bienosaurus was a nomen dubium, possibly identical to Tatisaurus from the same formation.[6]
^Simmons D.J. (1965), The non-therapsid reptiles of the Lufeng Basin, Yunnan, China. Field Geol 15; 1-93.
^Z. Dong. (1990). "Stegosaurs of Asia". In: K. Carpenter and P. J. Currie (eds.), Dinosaur Systematics: Perspectives and Approaches, Cambridge University Press, Cambridge pp. 255-268
^Lucas S.G. (1996). The thyreophoran dinosaur Scelidosaurus from the Lower Jurassic Lufeng Formation, Yunnan, China. pp. 81-85, in Morales, M. (ed.), The Continental Jurassic. Museum of Northern Arizona Bulletin 60.
^Norman, David B.; Butler, Richard J.; Maidment, Susannah C.R. (2007). "Reconsidering the status and affinities of the ornithischian dinosaur Tatisaurus oehleri Simmons, 1965". Zoological Journal of the Linnean Society. 150 (4): 865–874. doi:10.1111/j.1096-3642.2007.00301.x.
^Raven, T.J., Barrett, P.M., Xu, X., and Maidment, S.C.R. (2019). "A reassessment of the purported ankylosaurian dinosaur Bienosaurus lufengensis from the Lower Lufeng Formation of Yunnan, China". Acta Palaeontologica Polonica64
tatisaurus, genus, ornithischian, dinosaur, from, early, jurassic, from, lower, lufeng, formation, yunnan, province, china, little, known, remains, fragmentary, type, species, oehleri, temporal, range, early, jurassic, sinemurian, preꞒ, njawscientific, classif. Tatisaurus is a genus of ornithischian dinosaur from the Early Jurassic from the Lower Lufeng Formation in Yunnan Province in China Little is known as the remains are fragmentary 1 The type species is T oehleri TatisaurusTemporal range Early Jurassic Sinemurian PreꞒ Ꞓ O S D C P T J K Pg NJawScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClade DinosauriaClade OrnithischiaClade ThyreophoraGenus TatisaurusSimmons 1965Species T oehleriBinomial name Tatisaurus oehleriSimmons 1965SynonymsBienosaurus lufengensis Dong 2001 Scelidosaurus oehleri Simmons 1965 Lucas 1996Discovery and species editIn 1948 and 1949 Father Edgar Oehler a Catholic priest working for the Fu Jen Catholic University at Beijing excavated fossils near the village of Da Di in Yunnan Among them was the jaw bone of a herbivorous dinosaur In 1965 David Jay Simmons named and described it as the type species Tatisaurus oehleri The generic name is derived from Da Di then more usually spelled as Ta Ti The specific name honours Oehler 2 The holotype FMNH CUP 2088 was found in the Zhangjiawa Beds of the Lufeng Formation dating from the Sinemurian It consists of a partial left mandible with teeth The lower jaw bone fragment is lacking the tip six centimetres long The teeth are eroded It is the only specimen known of the species Simmons assigned Tatisaurus to the Hypsilophodontidae though this group was seen by him as an evolutionary grade of primitive Ornithopoda ancestral to several ornithischian groups He felt that Tatisaurus affinities were with Scelidosaurus or the Ankylosauria Later in 1990 the specimen was reviewed by Dong Zhiming who noted it had similarities with Huayangosaurus He placed the two genera in the same subfamily the Huayangosaurinae within the Stegosauria 3 Later still in 1996 Spencer Lucas reclassified Tatisaurus oehleri as a species of Scelidosaurus S oehleri in order to use Scelidosaurus for a biochron 4 In 2007 David B Norman and colleagues regarded this as unfounded They instead found Tatisaurus to be a dubious basal thyreophoran showing a single thyreophorean synapomorphy a ventrally deflected mesial end of the dentary If considered a thyreophoran it would be one of the oldest known members of the group 5 In 2019 a study concluded that Bienosaurus was a nomen dubium possibly identical to Tatisaurus from the same formation 6 References edit Dong Zhiming 1992 Dinosaurian Faunas of China China Ocean Press Beijing ISBN 978 3 540 52084 9 Simmons D J 1965 The non therapsid reptiles of the Lufeng Basin Yunnan China Field Geol 15 1 93 Z Dong 1990 Stegosaurs of Asia In K Carpenter and P J Currie eds Dinosaur Systematics Perspectives and Approaches Cambridge University Press Cambridge pp 255 268 Lucas S G 1996 The thyreophoran dinosaur Scelidosaurus from the Lower Jurassic Lufeng Formation Yunnan China pp 81 85 in Morales M ed The Continental Jurassic Museum of Northern Arizona Bulletin 60 Norman David B Butler Richard J Maidment Susannah C R 2007 Reconsidering the status and affinities of the ornithischian dinosaur Tatisaurus oehleri Simmons 1965 Zoological Journal of the Linnean Society 150 4 865 874 doi 10 1111 j 1096 3642 2007 00301 x Raven T J Barrett P M Xu X and Maidment S C R 2019 A reassessment of the purported ankylosaurian dinosaur Bienosaurus lufengensis from the Lower Lufeng Formation of Yunnan China Acta Palaeontologica Polonica 64 nbsp Dinosaurs portal nbsp This article related to ornithischian dinosaurs is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Tatisaurus amp oldid 1168111670, wikipedia, wiki, book, books, library,
