FIGURE 3. A in Review of the enigmatic 'shark', Platyacrodus unicus Ameghino, 1935, from the Paleocene of Patagonia, Argentina: a history of palaeontologists, sharks and crabs

FIGURE 3. A, Photograph of Platyacrodus unicus (holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian). B, Photograph and C, interpretative drawing of the retroplumid crab Costacopluma salamanca (holotype, Colección de Paleontología de la Facultad de Ciencias Exactas y Naturales de la Universidad de Buenos Aires 17376). Not to scale. B and C, modified from Feldmann et al. (1997).