Fig. 5
From: New insights into mesoderm and endoderm development, and the nature of the onychophoran blastopore
Expression of Tbx20/H15 In all panels, anterior is to the left, lateral views, dorsal up. Panels A´ and D´ represent SYBR Green staining of the embryos shown in panels A and D. Asterisks in panels A and B mark segmental expression. Arrows in panels B–D point to mesodermal expression in the developing appendages. Panel D represents a thin section. The arrowhead in panel E marks dorsal expression in the developing heart. Developmental stages are indicated (staging system after [9], their supplementary data). Abbreviations: e, eye; hl, head lobe; j, jaw; L, leg; sp, slime papilla