Trestman (2013a) argues that the evolution of complex active bodies requires a capacity for integrated, embodied spatial cognition, and that this capacity evolved independently in each of the three phyla in which it is currently found (vertebrates, arthropods and mollusks). If Merker (2005) is right that consciousness represents a solution to the neural-logistics problems posed by controlling a complex body in space, it may be a good bet that these three lineages are likely suspects for possessing consciousness. This line of reasoning can be bolstered by considering the role of temporal integration of perceptual information in consciousness and in action-selection and object-oriented perception (Trestman 2013b). Perhaps each of these three lineages evolved consciousness independently during the transition from a relatively simple worm-like body morphology to having complex active bodies.