FIGURE 5. A in Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles

FIGURE 5. A to G: Sertularella fraseri nom. nov.—erect stem (A); portion of stem with hydrothecae, side branch, and gonotheca (B); hydrothecae (C); gonothecae inserted on stem internodes (E, F); transverse section through gonotheca, showing four apical cusps (G). H to M: Sertularia tongensis (Stechow, 1919)—portion of stem showing internodes and hydrothecae (H); fragment of stem with side branch arising from within hydrothecae (I); hydrotheca; hydrothecal aperture in apical (left) and lateral (right) views, showing pleated opercular flaps (K); gonotheca typically springing from hydrotheca (L); cnidome (M). N to P: Hincksella cylindrica (Bale, 1888)—erect stem (N); two internodes with hydrothecae (O); nematocysts (P). Scale bars: 10 µm (M, P); 100 µm (D, K); 200 µm (J); 300 µm (C, E, F, G, L, O); 400 µm (H, I); 500 µm (B); 750 µm (N); 1 mm (A).