Fig. 2
From: On the taxonomy and osteology of the Early Eocene North American Geranoididae (Aves, Gruoidea)
Proximal tarsometatarsi and distal tibiotarsi of geranoidids from the Willwood Formation and extant Gruoidea. Proximal ends of right tarsometatarsi in plantar view: a ?Palaeophasianus sp. (AMNH 5156). b Psophia crepitans (Psophiidae). c Aramus guarauna (Aramidae). Proximal ends of tarsometatarsi in proximal view: d Palaeophasianus meleagroides (holotype, AMNH 5128), left tarsometatarsus. e ?Palaeophasianus sp. (AMNH 5156), right tarsometatarsus. f Eogrus aeola (holotype, AMNH 2936), right tarsometatarsus. g P. crepitans, left tarsometatarsus. h A. guarauna, left tarsometatarsus. i Balearica regulorum (Gruidae), left tarsometatarsus. Left tibiotarsus of P. meleagroides (holotype, AMNH 5128) in j cranial and k medial view. l Right tibiotarsus of ?Palaeophasianus sp. (AMNH 5156). Left tibiotarsus of AMNH 5127 (cf. “Eogeranoides campivagus”) in m cranial and n medial view. o Right tibiotarsus of Eogrus aeola (AMNH 2946). Distal ends of left tibiotarsi of extant Gruoidea: p, q P. crepitans. r, s A. guarauna. t B. regulorum. clt crista lateralis, cmd crista medialis, eic eminentia intercotylaris, fbl sulcus for musculus fibularis longus, fdl sulcus/canal for tendon of musculus flexor digitorum longus, fhl sulcus for tendon of musculus flexor hallucis longus, fp2 sulcus for tendon of musculus flexor perforatus digiti 2, fpp2 sulcus for tendon of musculus flexor perforans et perforatus digiti 2, imc intermediate crest, ntc notch in distal rim of condylus medialis, and tbc tubercle laterodistal of pons supratendineus. Scale bars 10 mm