Named By: Robert Broom - 1911.
Classification: Chordata, Reptilia, Dinosauria, Saurischia, Sauropodomorpha, Massopoda.
Species: G. africanus (type).
Size: About 5 meters long.
Known locations: South Africa - Upper Elliot Formation.
Time period: Hettangian/Sinemurian of the Jurassic.
Fossil representation: Partial post cranial skeleton.
was first named by Robert Broom in 1911who when he described this
dinosaur thought that he was naming a theropod dinosaur. This
assessment was seconded in 1932 when Friedrich von Huene classified
Gryponyx in with the Carnosauria. By 1976 Gryponyx
to actually be a sauropodomorph
dinosaur (the group ancestral to the
and titanosaurs), however at this time Gryponyx
synonymised with a species of Massospondylus.
M. harriesi in a
study by Galton and Cluver. In 1981 M. Harriesi
in with another Massospondylus species, M.
carinatus. Then in
2004 a study by Vasconcelos and Yates resurrected Gryponyx
distinct genus separate from Massospondylus, and
referencing this decision have all supported the re-establishment of
the Gryponyx genus.
Gryponyx was a mid-sized sauropodomorph dinosaur probably roaming about on all fours, but able to adopt a bipedal posture when browsing upon plants. While other species of Gryponyx have been named, in modern times only the type species has been considered to be valid.
Another dinosaur named by Robert Broom in 1911 was Geranosaurus.
- On the dinosaurs of the Stormberg, South Africa. - Annals of the South African Museum 7(4):291-308. - Robert Broom - 1911.
- Die fossile Reptil-Ordnung Saurischia, ihre Entwicklung und Geschichte. - Monographien zur Geologie und Paläontologie, Series 1 4: 1–361. - Friedrich von Huene - 1932.
- Anchisaurus capensis (Broom) and a revision of the Anchisauridae (Reptilia, Saurischia). - Annals of the South African Museum 69(6):121-159. - P. M. Galton & M. A. Cluver - 1976.
- The prosauropod dinosaur Massospondylus carinatus Owen from Zimbabwe: its biology, mode of life and phylogenetic significance. - Occasional Papers of the National Museums and Monuments of Rhodesia, Series B, Natural Sciences 6(10):689-840. - M. R. Cooper - 1981.
- Sauropodomorph biodiversity of the upper Elliot Formation (Lower Jurassic) of southern Africa. - Geoscience Africa, Abstract Volume 2:670. - A. M. Yates - 2004.
- A New Basal Sauropod Dinosaur from the Lufeng Basin, Yunnan Province, Southwestern China. - Acta Geologica Sinica (English Edition) 84 (6): 1336–1342. - Lü Junchang, Yoshitsugu Kobayashi, Li Tianguang & Zhong Shimin - 2010.
- A new transitional sauropodomorph dinosaur from the Early Jurassic of South Africa and the evolution of sauropod feeding and quadrupedalism. - Proceedings of the Royal Society B 277 (1682): 787–794. - A. M. Yates, M. F. Bonnan, J. Neveling, A. Chinsamy & M. G. Blackbeard - 2010.