Figure 5

Inferred evolution of chelicerate hemocyanin, assuming minimization of duplication events. Circles indicate gene duplication (blue), gene losse (yellow), observed extant copy (green), or unknown (white). Grey boxes indicate inferred ancestral copies; enclosed text indicates descendent hemocyanin paralogs. Line drawings indicate orders wherein hemocyanin has been discovered. Basal relationships are shown for spiders (Araneae).