Lewisuchus admixtus (Romer 1972; Bittencourt et al. 2014; Ezcurra et al. 2019) Middle Triassic (235 mya, UNLR 01; CRILAR-Pv 552) ~70 cm, was a small bipedal crocodylomorph close to SMNS 12591.
The skull of Lewisuchus was more gracile with larger fenestrae. Distinct from Gracilisuchus, the cervicals were more gracile with smaller neural spines. The dorsal ribs were smaller.
The scapulocoracoid was gracile, as was the humerus. Only two fingers are known of the manus. The tibia is robust. The blue pelvis and femur are based on Pseudhesperosuchus.
Nesbitt et al. 2014 suggested that Pseudolagosuchus was a possible junior synonym of Lewisuchus, but the two partial specimens share no bones in common. The were coeval and found not far from one another.
Ezcurra et al. 2019 found associated bones, including a pelvis and hind limb (sans pes) that also match those of Lewisuchus.
UNLR = Universidad Nacional de La Rioja, La Rioja, Argentina
CRILAR-Pv = Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja, Argentina
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