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Fig. 1 | BMC Biology

Fig. 1

From: Wonky whales: the evolution of cranial asymmetry in cetaceans

Fig. 1

Average radii per landmark (x̄ρland) for each taxon group. Landmarks superimposed onto a stylised skull which represents an average specimen for that group. Cooler yellows show less asymmetry, warmer oranges and reds show more asymmetry. The white landmarks are fixed reference landmarks (1-66) and therefore show no movement. From left to right: a the average landmark radii (x̄ρland) for terrestrial artiodactyls, b the average landmark radii for archaeocetes, c the average landmark radii for odontocetes, and d the average landmark radii for mysticetes. Landmarks on skulls a and d consist of pale yellows indicating low asymmetry. The landmarks on skull b are pale yellow, with darker yellows on the jugal, orbit, and rostrum indicating a higher level of asymmetry. Oranges and red landmarks in the nasal, posterior premaxilla, and posterior maxilla on skull c (the odontocete) indicate a high level of asymmetry. Skulls not to scale

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