Figure 1. Hydroschendyla submarina, 3D in The preoral chamber in geophilomorph centipedes: comparative morphology, phylogeny, and the evolution of centipede feeding structures

Figure 1. Hydroschendyla submarina, 3D reconstructions of the head (antennae cut off at their base and forcipules removed) based on histological sections (volume rendering), showing the position of the regions of interest of the present study. A, complete head reconstruction in oblique-frontal view; rectangle indicates the position where heads were sliced into two halves to examine epi- and hypopharynx by SEM; B, anterior half of the head, oblique view from behind on epipharynx; C, posterior half of the head, same view as in A but with the anterior half removed to show the hypopharynx and mandibular gnathal lobes. Abbreviations: an, antenna; br, brain; ep, epipharynx; hy, hypopharynx; md, mandible; mo, mouth; mx I, first maxilla; mx II, second maxilla.