English: The hands of oviraptorosaurs, showing basal oviraptorosaurs (A-B), Caenagnathidae (C-G) and Oviraptoridae (H-R). Colors signify diagnostic attributes of each group, with blue representing caenagnathid features (1-7), red representing oviraptorid features (8-15), green representing “ingeniine” features (16-21), light orange representing other features (22-25) not evenly distributed among taxa, and violet representing features basal to or restricted to non-caenagnathoid oviraptorosaurs (26-31). See text for clarification.

• A, Protarchaeopteryx robusta, based on NGMC 2127;
• B, Caudipteryx sp., based on IVPP V12430;
• C, Anzu wyliei, based on CM 78000;
• D, Gigantoraptor erlianensis, based on LH V0011;
• E, Chirostenotes pergracilis, based on CMN 2367 and RTMP 1979.20.1;
• F, Hagryphus giganteus, based on UMNH VP 12765;
• G, Elmisaurus rarus, based on ZPAL MgD-I/98;
• H, Wulatelong gobiensis, based on IVPP V18409;
• I, Oviraptor philoceratops, based on AMNH FABR 6517;
• J, the Bayan Mandahu “oviraptorine,” IVPP V9608;
• K, the Zamyn Khondt “oviraptorid,” MPC-D 100/42;
• L, Citipati osmolskae, based on MPC-D 100/979;
• M, Conchoraptor gracilis, based on MPC-D 100/20;
• N, Khaan mckennai, based on MPC-D 100/1127;
• O, Machairasaurus leptonychus, based on IVPP V15979;
• P, Nemegtomaia barsboldi, based on MPC-D 107/15 and 107/16;
• Q, “Ingenia“ yanshini, based on MPC-D 100/30;
• R, Heyuannia huangi, based on HYMV1-2.