(A-D) Late expression of aUbx in Glomeris marginata. All embryos have anterior to the left. Asterisks mark anal valves. White arrows point to lack of expression in limb buds of T4 and T5. an, Antennal segment; st, embryonic stage; T1-T3, first to third trunk segment; T2a, anterior part of T2; T2p, posterior part of T2.