Figure 4 in On the enigmatic symbiotic polychaete 'Parasyllidea' humesi Pettibone, 1961 (Hesionidae): taxonomy, phylogeny and behaviour

Figure 4. Oxydromus humesi. SEM photographs of the specimens from Congo (A, C, E) and Cádiz Bay (B, D, F). A, B, anterior end, dorsal view. C, D, detail of the anterior end, dorsal view; white arrow indicates the position of the nuchal organ. E, F, detail of the prostomium, dorsal view; the arrows indicate the prostomial median ridge and the expected position of the minute central antennae (visible only in F). Scale bars are micrometres.