FIGURE 4 in SEM study of species of Oswaldella Stechow, 1919 (Cnidaria, Hydrozoa, Kirchenpaueriidae), with an annotated checklist of the species of the genus

FIGURE 4. Oswaldella erratum Peña Cantero & Vervoort, 1997. A, hydrocladial branching and disposition of hydrothecae; B, cauline apophysis with axillary nematophores; C, unforked hydrocladial internode showing hydrothecal aperture and mesial superior and mesial inferior nematophores; D–E, unforked hydrocladial internodes (D frontal view, E lateral view); F, detail of mesial inferior nematotheca; G, gonotheca. Scale bar: 400 µm (A), 200 µm (F), 80 µm (D–E), 50 µm (B–C) and 20 µm (G).