World Hydrozoa Database

Hydrozoa taxon details

Tricyclusidae Kramp, 1949

235733  (

Genus Tricyclusa Stechow, 1919

Genus Tiarella Schulze, 1876 accepted as Tricyclusa Stechow, 1919 (preoccupied by Tiarella Swainson 1840 [Mollusca])
marine, brackish, fresh, terrestrial
recent only
Not documented
Schuchert, P. (2018). World Hydrozoa Database. Tricyclusidae Kramp, 1949. Accessed at: on 2018-11-17
2006-12-14 09:10:20Z
2008-01-10 07:31:11Z
2009-04-28 06:22:10Z

basis of record Petersen (1990) [details]   

additional source 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. (look up in IMIS[details]   
From regional or thematic species database
Diagnosis Solitary, usually benthic hydroids, having a conical to pear-shaped hydranth and tapering pedicel ending in a small attachment disc. Pedicel covered in a loose, filmy or gelatinous perisarc. Tentacles in three whorls, one oral whorl, one in middle of hydranth body, and one near base of body. Oral tentacles capitate, other tentacles also capitate but bearing additional nematocyst clusters. Vegetative budding of hydranths below proximal tentacles. Gonophores develop above proximal set of tentacles and remain fixed. Male gonophores medusoid, with radial canals and circular canal. Female ones without canal system. Cnidome: Stenoteles, desmonemes, and heteronemes. [details]