Genus: Ostafrikasaurus BUFFETAUT, 2011
Etymology: Ostafrikasaurus, from the name used by the Germans (/Deutsch]-Ostafrika) for the part of East Africa including Tendaguru at the time of the expeditions of the Berlin Museum, and Greek, sauros, "lizard."

Species: crassiserratus BUFFETAUT, 2011
Etymology: Latin, crassus, "thick" and Latin, serratus, "serrated"; referrig to the large size of the serrations on the carinae.
= Spinosauridae incertae sedis BUFFETAUT, 2008/JANENSCH, 1920

Holotype: MB.R.1084 ("Typus a" of Janensch, 1925)

Locality: Mahimbwi Valley, Om, Tendaguru, Mtwara, Tanzania, East Africa.

Horizon: Upper Dinosaur Member ("Oberer Sauriermergel"), Tendaguru Formation.

Biostratigraphy:

Age: Kimmeridgian Stage, uppermost Malm Epoch, Late Jurassic.

Material: Tooth.

Referred material:

MB.R.1091 ("Typus d" Janensch, 1925)