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Humeri of large extinct Monachinae. The humeri of the type specimens of ‘A. atlantica’ USNM PAL 181419 (a,d), S. magnus USNM PAL 534034 and ‘M. ambigua’ IRSNB 1156-M177 in lateral (a–c) and posterior (d–f) views. (a,c,d,f) horizontally flipped. Double-sided arrows indicate bone profile. Scale bar, 5 cm. Photo of IRSNB 1156-M177 taken by Sébastien Beaudart.
