Aetonyx is a dubious genus of sauropodomorph dinosaur from the Early Jurassic of southern Africa. Its only species is A. palustris, which was named by Robert Broom in 1911 based on a fragmentary skeleton from the upper Elliot Formation found near Fouriesburg, Free State Province. Broom considered it as a species of "carnivorous dinosaur". In 1924, Sydney H. Haughton assigned a second specimen to Aetonyx, which is also from Fouriesburg. In 1932, Friedrich von Huene suggested that the species Thecodontosaurus dubius, which Haughton had named in his 1924 paper, is a synonym of Aetonyx palustris.
Aetonyx is a dubious genus of sauropodomorph dinosaur from the Early Jurassic of southern Africa. Its only species is A. palustris, which was named by Robert Broom in 1911 based on a fragmentary skeleton from the upper Elliot Formation found near Fouriesburg, Free State Province. Broom considered it as a species of "carnivorous dinosaur". In 1924, Sydney H. Haughton assigned a second specimen to Aetonyx, which is also from Fouriesburg. In 1932, Friedrich von Huene suggested that the species Thecodontosaurus dubius, which Haughton had named in his 1924 paper, is a synonym of Aetonyx palustris. The species was later synonymised with Massospondylus harriesi and Massospondylus carinatus. A 2004 review lists it as an indeterminate sauropodomorph.
== Discovery == Aetonyx was named in 1911 by Robert Broom from a fragmentary skeleton excavated by A. R. Walker, who worked at the Iziko South African Museum, where the specimen is still stored (specimen number SAM-PK-2768-2770). The specimen was found near Fouriesburg, Free State Province, in sediments of the upper Elliot Formation, which was deposited during the Hettangian and Sinemurian ages of the Early Jurassic.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).