Apomorphic and shared with other taxa. A synapomorphic character state is a not plesiomorphic character state which occurs in at least two taxa in a phylogeny containing those taxa.
cladogram of six taxa, t1 to t6, with character states indicated by bullets; the characters states 4 and 10 are synapomorphic with respect to the red taxa t3, t4, t5, and t6. It is important to note that in a cladogram only comprising the red taxa the cha