(A–E) Lateral views of the same Parhyale embryo shown in Figure 4. Yellow masks indicate the left T2 limb (limb#1). (F–J) Tracked cells contributing to the T2 limb color-coded by the DV column they belong to: column three in yellow, four in orange, five in red, six in green, seven in cyan, eight in blue, and nine in magenta. Note the cell mixing and irregular clone borders between descendent cells from neighboring columns. (K–O’) Tracked cells contributing to the T2 limb belong to the E4 and E5 parasegments, and are color-coded by the AP row they belong to: a row in cyan, b rows in yellow, c row in green and d row in magenta. Note the absence of cell mixing at the AP compartment boundary between anterior E4d cells (magenta) and posterior E5a cells (cyan), as well as the absence of cell mixing at the presumptive DV boundary between ventral E4b cells (yellow) and dorsal E4c cells (green) anteriorly, and between ventral E5b cells (yellow) and dorsal E5a cells (cyan) posteriorly. (F,K) Ventral views of the limb primordium at 84 hr (h) after egg-lay (AEL). (G,L) Ventral views of the limb during early eversion at 96 hr AEL. (H,M) Dorsal views of the limb bud at 103 hr AEL. (I,N) Dorsal views of initial limb elongation at 114 hr AEL. (J,O) Dorsal views of later elongation phase at 123 hr AEL. (M’–O’) Ventral views, rotated 180˚ relative to M–O.