421 bd base (1) Oral arm color pink or light brown pink or light brown (4) Gastric filaments in medusae < 8.
Few gastric filaments attached to stomach wall near opening of gonadal sac.
Gastric filaments occur only in medusae [less than or equal to] 8.
11) sole comment that gastric filaments were tiny protuberances within a "gastrogenital" sac (see reproduction in Fig.
larsoni (see also Larson, 1987) indicates that Drymonema resorbs gastric filaments between 6.
Pieces of tissue from tentacles, subumbrellar vesicles, and gastric filaments were smeared on a slide; nematocysts in these smears were examined using differential interference contrast microscopy at 100X magnification.
Gastric filaments opaque cream, long, slender, bluntly pointed, restricted to base of calyx, between gametogenic pads.
Members of Stauromedusae possess features that appear to be homologous with those of Cubozoa and Scyphozoa, such as intramesogleal muscles of the polyp, gastric filaments, hollow structures ontogenetically derived from primary polyp tentacles known as anchors or rhopalioids, and a metamorphosis from juvenile to adult morphology concentrated at their oral ends (Uchida, 1929; Hirano, 1986; Kikinger and Salvini-Plawen, 1995).
By similar reasoning, gastric filaments and a coronal muscle are features that were likely lost in the ancestry of Hydrozoa.