Table 1 Endocast, calculated brain size and Manger’s EQ7 for the proboscideans used in the analyses.

From: Brain evolution in Proboscidea (Mammalia, Afrotheria) across the Cenozoic

  Endocast volume (cm3) Brain size (g) Body mass (g) EQ Manger
Elephas maximus 4550b 4181 2267430b 1,83
Elephas maximus 5220b 4798 3216000b 1,62
Elephas maximus 5000b 4595 3450400b 1,48
Elephas maximus 6075b 5584 3190098b 1,90
Loxodonta africana 5712b 5250 6654000b 1,05
Loxodonta africana 9000b 8274 4380000b 2,23
Loxodonta africana 4000b 3676 5174400b 0,88
Loxodonta africana 4050b 3722 1793300b 1,93
Loxodonta africana 4420b 4062 3505000b 1,29
Loxodonta africana 5300b 4871 5550000b 1,11
Loxodonta africana 4480b 4117 2750000b 1,56
Loxodonta africana 4210b 3869 4000000b 1,12
Loxodonta africana 4100b 3768 2160000b 1,70
Loxodonta africana 4000b 3676 2537000b 1,48
Palaeoloxodon falconeri 1800a 1652 1680004 4,81
Palaeoloxodon antiquus 5446a 5005 3649880a 1,54
Palaeoloxodon antiquus 9000a 8274 11000000c 1,14
Mammuthus primigenius 4687a 4307 6000000d 0,92
Mammuthus meridionalis 5828a 5357 11000000d 0,74
Mammuthus columbi 6232a 5728 9800000d 0,86
Mammut americanum 3862a 3549 6384056a 0,73
Mammut americanum 4630a 4255 8000000d 0,74
Stegodon insignis 3838 3527 2000000d 1,69
Zygolophodon borsoni 5133 4718 16000000d 0,50
Palaeomastodon beadnelli 771 706 2500000d 0,29
Moeritherium lyonsi 240a 218 810000d 0,20
Prorastomus sirenoides 87b 90 98156b 0,39
Seggeurius amourensis 5b 5 2932b 0,29
  1. The sirenian Prorastomus and the hyracoid Seggeurius were added for comparative purposes but were not included in the analyses. Sources of data: a10; b36;c34;d37.