Hydroid mostly stolonal, occasionally branched, one oral whorl of four to five capitate tentacles, with or without ... [details]
Hydroid with one oral whorl of capitate tentacles, each with up to ten gastrodermal cells, with one aboral whorl ... [details]
Cladonematidae with branched oral tentacles; umbrella bell-shaped,with an apical cavity above manubrium. [details]
Hydroid with an oral whorl of up to ten capitate tentacles, without aboral filiform tentacles; medusae buds carried ... [details]
Eleutheria medusa without brood-chamber, medusae buds within subumbrella, usually eight tentacles, tentacles ... [details]
Eleutheria medusa with brood-chamber, medusae buds outside on bell rim or exumbrella, normally six tentacles, ... [details]
Capitata with solitary, pelagic hydroids; hydrocaulus absent or reduced to a small process; hydranth vasiform, ... [details]
Hydroid stolonal or sessile, hydranths with an oral whorl of capitate tentacles, with or without aboral filiform ... [details]
Solitary, usually benthic hydroids, having a conical to pear-shaped hydranth and tapering pedicel ending in a small ... [details]
Publication date of Vigurs name is most likely 1850 and not 1849. [details]
Stechow (1921: 248) pointed out that the genus Candelabrum de Blainville, 1830 has priority over Myriothela Sars, ... [details]
Taxonomic status unclear, polyp stage unknown, usually regarded as synonym of Cladonema radiatum [details]
This is an invalid name. McCrady used Nemopsis gibbesi for a medusa and a pelagic polyp (which proved to be ... [details]
The type material came from Osterfjord and Herløfjord in Norway, 0-400 m [details]
Vico Equense in the Gulf of Sorrento, Italy, Mediterranean. [details]
Acauloides ammisatum Bouillon, 1965 strongly resembles the vegetative reproduction stage of A. ilonae ... [details]