Figure 1From: Protein evolution in two co-occurring types of Symbiodinium: an exploration into the genetic basis of thermal tolerance in Symbiodiniumclade DPhylogenetic tree of Symbiodinium clades A-D used in PAML analyses investigating rates of amino acid sequence evolution. Grey branches indicate the focal lineages leading to Symbiodinium clades C and D. Numbers indicate estimated divergence times (in millions of years) based on [10, 18].Back to article page