FIGURE 20 in SEM study of species of Oswaldella Stechow, 1919 (Cnidaria, Hydrozoa, Kirchenpaueriidae), with an annotated checklist of the species of the genus

FIGURE 20. Cauline apophysis showing axillary nematophores and, when present, 'mamelons'. A, Oswaldella laertesi; B, Oswaldella niobae; C, Oswaldella rigida; D, Oswaldella stepanjantsae; E, Oswaldella shetlandica; F, Oswaldella vervoorti; G, Oswaldella sp. Scale bar: 100 µm (G) and 20 µm (A–F).