WoRMS taxon details
From editor or global species database
Diagnosis Hydroid colony forming a chitinized hydrorhizal stolonal plate; hydranths columnar, with thickened, ridged mesogloeal lamella; tentacles hollow, capitate, in one or five to six close-set whorls around a conical hypostome; gonophores in clusters on proximal part of hydranth body or developing from from hydrorhiza. Gonophores free medusae or sessile sporosacs.
Medusa umbrella evenly rounded; with or without gastric peduncle; four marginal tentacles with scattered nematocyst knobs and a small capitation; tentacular bulbs clasping, with ocelli; manubrium broadly flask-shaped or tubular, quadrate or cruciform; oral part of manubrium prismatic, ending in a cruciform mouth with or without nematocyst clusters; gonads interradial, without longitudinal groove, surrounding nearly the whole manubrium. [details]
From editor or global species database
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