Fig. 5
Lox5 expression in the development of P. californiensis. Larval anterior is to the left. Stage of development is marked in the upper right corner of each image. Images in the right column show a different focal plane of the same larva as in the left column. Frontal views in all except b and bʹ. b and bʹ are lateral views. a, b Invagination-stage larva. c Rudiment-stage larva. d Late-rudiment stage. e Early-vermicular stage. Arrowheads indicate paired posterior invaginations. Asterisk indicates apical organ.