FIGURE 83 in The non-Siphonophoran Hydrozoa (Cnidaria) of Salento, Italy with notes on their life-cycles: an illustrated guide

FIGURE 83. Hydranthea margarica: A, portion of a fertile colony; B, hydrotheca with desmocytes and hydrorhiza projection; C, contracted hydranth with distal nematocyst clusters; D, gonotheca containing a female medusoid; E, a free male medusoid; F, discharged and undischarged nematocysts (merotrichous haplonemes) (A drawn by C.G. Di Camillo; B, C, D, E, F modified after Boero & Sarà 1987). Scale bars: A, C, D, E, 0.5 mm; B, 0.1 mm; F, 10 µm.