One trait that is shared by the Lophotrochozoa and Ecdysozoa is. One trait that is shared by the Lophotrochozoa and Ecdysozoa is. Both groups are bilaterally symmetric triploblasts with the deuterostome pattern of development. Both groups are asymmetric triploblasts with the protostome pattern of development. Both groups are bilaterally symmetric triploblasts with the protostome pattern of development. Both groups are asymmetric triploblasts with the deuterostome pattern of development.