Gypaetinae, Storr, 1784

Mather, Ellen K., Lee, Michael S. Y. & Worthy, Trevor H., 2022, A new look at an old Australian raptor places “ Taphaetus ” lacertosus de Vis 1905 in the Old World vultures (Accipitridae: Aegypiinae), Zootaxa 5168 (1), pp. 1-23 : 10

Gypaetinae

(1) The dorsal facies between the tuberculum supracondylare dorsale and epicondylus dorsalis is less inflated as a convex surface compared to the fossil, barely projecting dorsal of these two points; (3) the insertion point for the m. extensor digitorum communi does not form a distinct pit; (4) the attachment scar for the proximal head of pronator superficialis is small and deep; (5) the epicondylus ventralis forms a moderate, rounded peak; (8) the palmar attachment scar of the m. extensor metacarpi radialis is small, circular and shallow in all species except Polyboroides typus , where it is circular, rather than broad, robust and elevated, as in the fossil; (13) the tuberculum supracondylare ventrale is more flattened, not elevated cranially; (14) the interior margin of the tuberculum supracondylare ventrale is oriented at a lower angle across the shaft; (15) the insertion scars of the distal m. pronator superficialis and profundus are roughly the same depth in G. angolensis , while that of m. pronator profundus is shallower in P. typus and N. percnopterus ; (16) the incisura intercondylaris is broad in N. percnopterus (as in the fossil) and narrow in P. typus ; (17) the distal margin forms a deep narrow notch between the condyles; (19) the two parts of the sulcus m. humerotricipitalis are shallow in all taxa, with the dorsal sulcus roughly one third of shaft width in N. percnopterus and half the width in P. typus and G. angolensis . The sulcus for the ventral belly is a third to a quarter of the shaft width in all species.