Fig. 5

Spatial expression pattern of raldha, raldhb, raldhc, rar, and rxr in P. pectinifera.. a–o show results of whole mount in situ hybridization of raldha, raldhb, raldhc, rar and rxr in larval stages (a–e 6 dpf, f–j 9 dpf and k–o 14 dpf) and metamorphosing larvae just after settlement (p–t). Dot line means the boundary of before and after settlement. The inset figures of k, n and o show the expression in hydrolobes. L: left view, V: ventral view and D: dorsal view. Arrow heads indicate the expression in epidermis around brachiolar arms and white arrow heads point out the expression in hydrolobes. Arrows point expression in juvenile rudiment. Non-specific expressions are indicated by asterisk