the holotype, mnhn 1961-28, was found in a layer of the tiouraren formation dating from the bathonian-oxfordian. de lapparent had presumed that the strata dated from the early cretaceous. it consists of a cervical vertebra, seven pieces of the dorsals, three pieces of the sacrum, five tail vertebrae, a humerus, the lower end of a pubic bone, the lower end of a thighbone, a piece of a shinbone, a piece of a fibula, a metatarsal, four additional pieces of the metatarsus and a phalanx of a toe. the paratypes were an ulna, a metatarsal and a second partial skeleton consisting of vertebrae and limb elements. in 2004, sereno e.a. referred a third skeleton, specimen mnn tig6 consisting of a series of cervical and dorsal vertebrae together with some ribs.