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Table 3 Evolution of brain size during the evolution of H. floresiensis under two phylogenetic scenarios1.

From: Reconstructing the ups and downs of primate brain evolution: implications for adaptive hypotheses and Homo floresiensis

Ancestor

H. floresiensisbody mass (kg)

Ratio of change in

log(absolute brain mass) & log(body mass)2

Change in

log(brain mass)

Change in

log(relative brain mass)

Argue Tree 1

16

0.400*

-0.171*

0.121*

 

24

0.639*

-0.171*

0.012*

 

32

1.116

-0.171*

-0.066

Argue Tree 2

16

0.428*

-0.173*

0.104*

 

24

0.709*

-0.173*

-0.006*

 

32

1.336

-0.173*

-0.084

Both trees

16

0.418*

-0.176*

0.110*

 

24

0.679*

-0.176*

-0.001*

 

32

1.225

-0.176*

-0.076

  1. 1 These are the two most parsimonious topologies obtained by Argue et al. [43] and are shown in Figure 1 b (tree 1) & c (tree 2)
  2. 2 computed as: [(brain descendant - brain ancestor)/(body descendant-body ancestor)]
  3. * indicates a result which falls within the range of decreases in brain size for Primates estimated in this study.