Figure 3 in The trouble with flippers: a report on the prevalence of digital anomalies in Cetacea

Figure 3. Published reports of cetacean digital malformations. A, cartilaginous interdigital elements in a fin whale (Balaenoptera physalus; Kükenthal, 1893). B and C, polyphalangy and an accessory ossification in two harbour porpoise (Phocoena phocoena; Kunze, 1912). D, polydactyly in the vaquita (Phocoena sinus; Ortega-Ortiz et al., 2000). E, polyphalangy in a bottlenose dolphin (Tursiops truncatus; Watson et al., 1994). F, polyphalangy in the beluga (Delphinapterus leucas; Yablokov, 1974). Illustrations are not drawn to scale. Roman numerals identify digits. Key: metacarpals, dark grey; phalanges, light grey; cartilages, white; anomalous elements, black.