World Hydrozoa Database

Hydrozoa taxon details

Rhysiidae (Hickson & Gravely, 1907)

231546  (

Not documented
Schuchert, P. (2018). World Hydrozoa Database. Rhysiidae (Hickson & Gravely, 1907). Accessed at: on 2019-02-23
2006-05-29 14:23:10Z
2009-04-28 06:22:10Z

basis of record RAMS Hydrozoa checklist from Dr. Álvaro L. Peña Cantero (look up in IMIS[details]   
From editor or global species database
Diagnosis Hydroid stolonal or sessile, polymorphic; hydrorhiza tubular, covered with perisarc; gastrozooid naked, columnar, with either one whorl of filiform tentacles or with nematocyst clusters and a few thick filiform tentacles around hypostome; dactylozooids, when present, covered with perisarc up to capitate tip; gonads on hydranth resembling gastrozooid, on one side of the body, no gonophores; male hydranth with 3 or 4 filiform tentacles, female hydrants with or without tentacles and transforming into a sporosac-like structure with the endoderm forming a spadix, one egg, developing into a planula. [details]