Wonky whales: the evolution of cranial asymmetry in cetaceans

Table 1 List of cetacean specimens with the highest sum radii across the cranium (Σρ_spec)

	Species	Family	Suborder	Sum radii (Σρ_spec)
1	Monodon monoceros USNM 267959	Monodontidae	Odontocete	0.546
2	Orycterocetus crocodilinus USNM 22926	Physeteridae	Odontocete	0.518
3	Aulophyseter morricei UCMP 81661	Physeteridae	Odontocete	0.489
4	Kogia breviceps USNM 22015	Kogiidae	Odontocete	0.462
5	Kogia simus NHMUK 1952.8.28.1	Kogiidae	Odontocete	0.457
6	Physeter macrocephalus NHMUK 2007.1	Physeteridae	Odontocete	0.456
7	Delphinapterus leucas USNM 305071	Monodontidae	Odontocete	0.453
8	Platanista gangetica USNM 172409	Platanistidae	Odontocete	0.449
9	Globicephala melas NMNZ MM001946	Delphinidae	Odontocete	0.410
10	Pseudorca crassidens USNM 11320	Delphinidae	Odontocete	0.408

ρ is the radius value calculated as the Euclidean distance between the computer -mirrored landmark and the manually placed landmark. The larger the value for ρ, the longer the radii for a corresponding landmark and the more it is displaced, indicating asymmetry between the two sides of the cranium

ISSN: 1741-7007