Encephalization and Brain Organization of Mobulid Rays (Myliobatiformes, Elasmobranchii) with Ecological Perspectives

Table 3: Percentages of Brain Subdivisions of Total Brain Mass in Relevant Elasmobranch Species

	Telencephalon	Diencephalon	Mesencephalon	Cerebellum	Medulla Oblongata
Hydrolagus colliei	33.3	6.5	15	22.6	22.6
Squalus acanthias	25.5	7.5	15.9	21.3	29.8
Carcharhinus taurus	30.57	11.42	9.47	25.28	23.26
Sphyrna lewini	53.75	4.44	6.53	23.71	11.57
Raja eglanteria	33	7	13	18	29
Myliobatis freminvillii	44	5.6	10	23	18
Mobula japanica	61	4.8	6.2	19.05	8.95
Sphyrna mokarran	67	3	4	18	8
Carcharhinus amblyrhynchos	64.23	4.73	8.3	13.07	9.67
Carcharhinus falciformes	63.48	4.99	8.31	12.53	10.68
Alopias superciliosus	27.19	3.15	16.19	32.09	21.39
Alopias vulpinus	26.79	1.66	15.6	30.6	33.02
Cetorhinus maximus	34	7	9	30	20

Holocephalimorph: Hydrolagus colliei [⁶]; benthopelagic sharks: Squalus acanthias [⁶], Carcharhinus taurus [⁹]; galeomorph, pelagic shark: Sphyrna lewini [⁹]; batoids:Rajiformes: Raja eglanteria [⁶], Myliobatiformes: Myliobatis freminvillii [⁶], and Mobula japanica. Sharks with larger telencephalon: Sphyrna mokarran [⁹], Carcharhinus amblyrhynchos [⁹], Carcharhinus falciformes [⁹]. Sharks with larger cerebellum: Alopias superciliosus [⁹], Alopias vulpinus [⁹], Cetorhinus maximus [⁴⁷].