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One of three most parsimonious trees (length 1671 steps, CI 0.6924, RI 0.5577) resulting from a Fitch parsimony analysis of 244 aligned amino acid positions of a conserved part of the SPO11 genes under study. Dashed branches will collapse in the strict consensus tree. Bootstrap values (>50%) are given along the branches. Ab, archaebacteria; an, animals; ap, apicomplexa; f, fungi; p, plants.
