Fig. 2

Pn-vasa expression patterns in the adult Pe. nuntia. a–g In situ hybridization experiment showing the Pn-vasa expressions in the parapodia of each body segment, dorsal view. h A schematic representation showing the direction of the parapodium. i A single parapodium from the posterior-body region showing the location of the Pn-vasa signal in the SNL (broken circle). Arrows (b–f) with the same colors below the parapodium represent the same segment. D, dorsal direction; V, ventral direction; P, posterior direction; A, anterior direction; SNL, superior notopodial ligule. Scale bar: a–g (1 mm); I (200 μm)