. 2019 Jun 27;9:9323. doi: 10.1038/s41598-019-45888-4

Table 1.

Endocast, calculated brain size and Manger’s EQ⁷ for the proboscideans used in the analyses.

	Endocast volume (cm³)	Brain size (g)	Body mass (g)	EQ Manger
Elephas maximus	4550^b	4181	2267430^b	1,83
Elephas maximus	5220^b	4798	3216000^b	1,62
Elephas maximus	5000^b	4595	3450400^b	1,48
Elephas maximus	6075^b	5584	3190098^b	1,90
Loxodonta africana	5712^b	5250	6654000^b	1,05
Loxodonta africana	9000^b	8274	4380000^b	2,23
Loxodonta africana	4000^b	3676	5174400^b	0,88
Loxodonta africana	4050^b	3722	1793300^b	1,93
Loxodonta africana	4420^b	4062	3505000^b	1,29
Loxodonta africana	5300^b	4871	5550000^b	1,11
Loxodonta africana	4480^b	4117	2750000^b	1,56
Loxodonta africana	4210^b	3869	4000000^b	1,12
Loxodonta africana	4100^b	3768	2160000^b	1,70
Loxodonta africana	4000^b	3676	2537000^b	1,48
Palaeoloxodon falconeri	1800^a	1652	168000⁴	4,81
Palaeoloxodon antiquus	5446^a	5005	3649880^a	1,54
Palaeoloxodon antiquus	9000^a	8274	11000000^c	1,14
Mammuthus primigenius	4687^a	4307	6000000^d	0,92
Mammuthus meridionalis	5828^a	5357	11000000^d	0,74
Mammuthus columbi	6232^a	5728	9800000^d	0,86
Mammut americanum	3862^a	3549	6384056^a	0,73
Mammut americanum	4630^a	4255	8000000^d	0,74
Stegodon insignis	3838	3527	2000000^d	1,69
Zygolophodon borsoni	5133	4718	16000000^d	0,50
Palaeomastodon beadnelli	771	706	2500000^d	0,29
Moeritherium lyonsi	240^a	218	810000^d	0,20
Prorastomus sirenoides	87^b	90	98156^b	0,39
Seggeurius amourensis	5^b	5	2932^b	0,29

The sirenian Prorastomus and the hyracoid Seggeurius were added for comparative purposes but were not included in the analyses. Sources of data: ^a ¹⁰; ^b ³⁶;^c ³⁴;^d ³⁷.