Skip to main content

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.