Figure 5 in New fossil mousebird (Aves: Coliiformes) with feather preservation provides insight into the ecological diversity of an Eocene North American avifauna

Figure 5. Details of the skeletal anatomy of Celericolius acriala. A, distal elements of left wing. B, pelvis, pygostyle, and left hindlimb. C, right foot. Abbreviations: cmc, carpometacarpus, dI, pedal digit I; dII, pedal digit II; dIII, pedal digit III; dIV, pedal digit IV; ext, impression of processus extensorius; hyp, cristae hypotarsi; isch, ischium; mpI-1, manual phalanx I-1; mpII-1, manual phalanx II-1; mpIII-1, manual phalanx III-1; pc, processus costales; pi, processus intermetacarpalis; pt, processus transversus vertebrae; pu, pubis; py, pygostyle; rad, radiale; tmt, tarsometatarsus; uln, ulnare. Scale bars: 5 mm.