Fig. 4

A HCR in situ hybridization of the S. benedicti Hox genes at distinct developmental stages of the planktotrophic developmental mode. 2-eye and 3-eye stages are ventral view, and early planktotrophic, late planktotrophic, and juvenile are lateral view. Yellow dashed lines encircle confirmed autofluorescent regions. Scale bars = 50 µm. B HCR in situ hybridization of the S. benedicti Hox genes at distinct early developmental stages of the lecithotrophic developmental mode. 2-eye and 3-eye stages are ventral view, and early planktotrophic, late planktotrophic, and juvenile are lateral view. Yellow dashed lines encircle confirmed autofluorescent regions. Scale bars = 50 µm