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Brachypodosaurus - Wikipedia

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Brachypodosaurus Temporal range: Late Cretaceous, 66 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	†Ornithischia (?)
Genus:	†Brachypodosaurus Chakravarti, 1934
Species:	†B. gravis
Binomial name
†Brachypodosaurus gravis Chakravarti, 1934

Brachypodosaurus (meaning "short-footed lizard") is a dubious genus of dinosaur, possibly an ornithischian, from the Late Cretaceous Lameta Formation (Maastrichtian) in India.

The only remains discovered so far for this animal consist of a single fossil bone, excavated at the Chota Simla Hill near Jabalpur. In 1934, geologist Dhirendra Kishore Chakravarti, of the Geological Museum of the Banaras Hindu University, considered it a humerus, of a stegosaurian. He named it as the type species Brachypodosaurus gravis. The generic name is derived from Greek βραχύς, brachys, "short", and πούς, pous, "foot". The specific name gravis means "heavy" in Latin.^[1] Chakravarti hereby became the first local scientist to name a dinosaur.

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Brachypodosaurus type locality in Chota Simla hill, Jabalpur, Madhya Pradesh, India

The holotype is IM V9. The bone is over a foot long. Chakravarti based his identification of the element as a humerus on the presence of a large crest on the shaft, which he took for the deltopectoral crest. The status as a (dinosaurian) humerus is problematic. The bone is flat, has a crest on the other side of the shaft also, is not twisted around its longitudinal axis, is strongly constricted above and below the crests and lacks a clear caput or condyles. In any case, it lacks stegosaurian synapomorphies.^[2] On the assumption it might at least be some member of the Thyreophora, it has been considered a possible ankylosaurian, the ankylosaurs being a sister group of the Stegosauria that survived into the Late Cretaceous. Even then, however, it was considered a nomen dubium as so few remains of the animal have been found.^[3] In 2004, Matthew Lamanna e.a. considered it unlikely that any Ornithischia were present in the Maastrichtian of India.^[4] The other Late Cretaceous genus from India originally described as a stegosaur, Dravidosaurus, is also of dubious validity, potentially based on plesiosaurian remains.

References

^ Chakravarti, D.K. (1934). "On a Stegosaurian Humerus from the Lameta Beds of Jubbulpore". The Quarterly Journal of the Geological, Mining and Metallurgical Society of India. 6 (3): 75–79.
^ Wilson, J. A., P. C. Sereno, S. Srivastava, D. K. Bhatt, A. Khosla, and A. Sahni. 2003. "A new abelisaurid (Dinosauria, Theropoda) from the Lameta Formation (Cretaceous, Maastrichtian) of India", Contributions from the Museum of Paleontology of the University of Michigan, 31:1–42
^ Maryanska T., 1977. "Ankylosauridae (Dinosauria) from Mongolia", Palaeontologia Polonica 37:85–151
^ Lamanna, Matthew C.; Smith, Joshua B.; Attia, Yousry S.; Dodson, Peter (2004). "From dinosaurs to dyrosaurids (Crocodyliformes): Removal of the post-Cenomanian (Late Cretaceous) record of Ornithischia from Africa". Journal of Vertebrate Paleontology. 24 (3): 764. doi:10.1671/0272-4634(2004)024[0764:FDTDCR]2.0.CO;2. S2CID 16525132.

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