Diagnosis

English

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Hydroid with one oral whorl of capitate tentacles, each with up to ten gastrodermal cells, with one aboral whorl with usually four filiform tentacles. Medusa tentacles branched several times, two and more adhesive branches in fully mature animals, two and more capitate branches; manubrium shorter than bell cavity, mouth with four to five spherical nematocyst clusters, gonads on manubrial pouches and on manubrium, radial canals bifurcated or not.

Schuchert, P. (2006). The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Capitata Part 1. <em>Revue suisse de Zoologie.</em> 113: 325-410.