Diagnosis
provided by World Register of Marine Species
Colonies erect, monosiphonic or polysiphonic, arising from creeping, rootlike, or disc-shaped hydrorhiza; hydrocauli branched or unbranched, hydrocladia alternate, opposite or in verticils, arising in polysiphonic hydrocauli from a single axial tube; hydrothecae typically small, uniseriate, usually at least partially adnate, occurring only on hydrocladia, with or without marginal cusps; nematophores with well developed nematothecae, not as naked sarcostyles; all nematothecae (axillar, cauline or hydrothecal) usually two-chambered (bithalamic) and movable, a minimum of three nematothecae adjacent to hydrothecae, one mesial inferior and a pair of lateral ones; gonophores as fixed sporosacs, exceptionally as swimming gonophores; gonothecae solitary, without nematothecae; with or without phylactocarps.
- license
- cc-by-4.0
- copyright
- WoRMS Editorial Board
- bibliographic citation
- Bouillon, J.; Gravili, C.; Pagès, F.; Gili, J.-M.; Boero, F. (2006). An introduction to Hydrozoa. Mémoires du Muséum national d'Histoire naturelle, 194. Muséum national d'Histoire naturelle: Paris, France. ISBN 2-85653-580-1. 591 + 1 cd-rom pp.
- contributor
- Schuchert, Peter, P.
