Figure 2.

Schematic summary of cell proliferation pattern and twist expression in Solenogastres. Apical/anterior is up in (A–E); dorsal is up in (A′–E′). Note that cell proliferation areas are not shown in (A) and (E) because no EdU labeling data are available for these stages. In stages where twist expression was not fully consistent, the maximum expression domain is depicted. (A–D) Ventral views of larvae. (E) Ventral view of juvenile. (A′–E′) Cross‐sections of corresponding stages at the position of the dashed lines in (A–E). at, apical tuft; pis, periimaginal space (sensu Salvini‐Plawen, 1980), that is, the cavity between the calymma and the outgrowing trunk of the animal; g, gut; pt, prototroch; t, trunk; tt, telotroch.