The character state most likely is a that would be synapomorphy useful for determining evolutionary relationships within genus X is Antennae with fewer than 10 segments in species C, D, E, and F.
For example, the presence of mammary glands is a synapomorphy for mammals in link to tetrapods but is a symplesiomorphy for mammals in relation to one another rodents and primates.
Thus, Antennae with fewer than 10 segments in species C, D, E, and F.
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