Fig. 5
From: The development of the adult nervous system in the annelid Owenia fusiformis
Expression of neural genes in the competent larvae. Differential Interference Contrast (DIC) images showing expression of soxC, pou4, six3/6, otx, nk2.1 and ChAt. a, c, e, g, i, k lateral views; b, d, f, h, j, l apical views. Insets are close ups of the corresponding larger images in anterior view. All genes, except for otx g–h, have a bilateral expression in the brain (br). a–b soxC is strongly expressed in the juvenile rudiment (jr), the mouth (mo), and the anterior part of the foregut (fg). g–l otx, nk2.1 and ChAt have some weaker expression in the foregut. g–h in addition otx is expressed in the prototroch. an: anus; br: brain; cs: chaetal sac; fg: foregut; jr: juvenile rudiment; mo: mouth; pgo: parapodial glandular organ; pt: prototroch