The protein is encoded by Act5C gene, a promising nuclear gene for insect phylogenetic. Actin is the main component of the micro lament system in all eukaryotic cells and is involved in basic cell processes including cellular motility, intracellular transport, muscle contraction and cytokinesis. Actin is also one of the most conserved proteins a property that facilitates alignment and primer design for new molecular markers. Actin sequences have been used as a phylogenetic marker in mollusks but their use in arthropod phylogenetic has been limited to a small number of species.