Spinostropheus is a genus of carnivorous neotheropod theropod dinosaur that lived in the Middle Jurassic period and has been found in the Tiouraren Formation, Niger.

In 1959, Albert-Félix de Lapparent excavated fossils near Oued Timmersöi, west of In Tedreft in the Agadez desert.

In 2004, Sereno et al. referred a third skeleton, specimen MNN TIG6 consisting of a series of cervical and dorsal vertebrae with some ribs.

[8] Subsequent studies have recovered it as a basal ceratosaur based on the specimen MNN TIG6, outside of Neoceratosauria, more closely in the evolutionary tree to Elaphrosaurus.

[11] In their 2020 description of the abelisaurid Spectrovenator, Zaher et al. recovered the Spinostropheus holotype as the sister taxon to the Averostra.