Fig. 6

The expression patterns of MIP, FRWa, FxFa and FILa in U. unicinctus larvae detected by whole-mount in situ hybridization. a, d, g and j correspond to early-trochophore (2 dpf, pelagic larva); b, e, h and k correspond to late-trochophore (25 dpf, correspond to LT in transcriptome data, pelagic larva) and (c, f, i and l) correspond to competent larva (35 dpf, correspond to SL in transcriptome data). The asterisk indicates the location of the larvae mouth; b, dorsal view; e and k, ventral view; the remaining panels are all lateral views. Scale bars: 200 μm. Negative controls with sense probe can be found in Supplementary Figure S3