Garrdimalga mcnamarai was named by Shute et al. (2017) [Species in other genera differ from Garrdimalga as follows. Carpometacarpus: (i) In all other genera apart from Progura, the processus extensorius is orientated more cranially. Progura is distinguished by having a processus that is relatively wider dorsoventrally (more than half the width of the adjacent trochlea carpalis). (ii) The processus pisiformis is relatively longer and more cranially protuberant in Leipoa, Alectura and Megapodius. In all extant and extinct genera examined, the caudal portion of the processus pisiformis is less protuberant relative to the cranial portion than in Garrdimalga, as seen in proximal aspect. (iii) In all genera examined besides Alectura, the ventral rim of the trochlea carpalis projects further caudally relative to the os metacarpale minus, and in all genera, the ventral rim of the trochlea is orientated about 30° to the long axis of the os metacarpale majus in caudal aspect, rather than aligned with the long axis as in Garrdimalga. (iv) In all other genera examined, the distal margin of the articular facet of the trochlea carpalis traverses the caudal facies at a shallower angle. Tibiotarsus: In all other genera, (i) the shaft proximal of the epicondylus medialis and the condylus medialis is concave, and (ii) the pons supratendineus overlaps proximodistally with the condylus lateralis. In all genera apart from Progura, the pons is placed relatively further distally on the shaft (proximal margin of the pons is a little further proximal in Progura). The only other genus in which the pons is constricted medially is Latagallina, but in this genus, it is placed slightly further distally on the shaft, thus the distal opening of the canalis extensorius is relatively smaller. For visual comparison, the diagnostic material is depicted alongside the bones of other extinct species in the electronic supplementary material, figure S1.]. Its type specimen is SAM P42711, a limb element (right carpometacarpus, missing os metacarpale minus), and it is a 3D body fossil. Its type locality is Curramulka Quarry, which is in a Pleistocene fissure fill horizon in Australia.