WoRMS taxon details

Tricyclusa singularis (Schulze, 1876)

235735  (urn:lsid:marinespecies.org:taxname:235735)

accepted
Species
marine, brackish, fresh, terrestrial
recent only
Schulze, F.E., 1876. Tiarella singularis, ein neuer Hydroidpolyp. Z. wiss. Zool. 27 : 403-416., available online at http://www.biodiversitylibrary.org/item/135763#page/523/mode/1up
page(s): 403 [details]  OpenAccess publication 

(ofTiarella singularis Schulze, 1876) Schulze, F.E., 1876. Tiarella singularis, ein neuer Hydroidpolyp. Z. wiss. Zool. 27 : 403-416., available online at http://www.biodiversitylibrary.org/item/135763#page/523/mode/1up
page(s): 415 [details]  OpenAccess publication 
Distribution Northeastern Atlantic.  
Distribution Northeastern Atlantic. [details]
Schuchert, P. (2018). World Hydrozoa Database. Tricyclusa singularis (Schulze, 1876). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=235735 on 2018-07-23
Date
action
by
2006-12-14 09:10:20Z
created
2008-01-16 10:35:54Z
changed
2011-10-07 10:37:49Z
changed

Creative Commons License The webpage text is licensed under a Creative Commons Attribution 4.0 License


original description Schulze, F.E., 1876. Tiarella singularis, ein neuer Hydroidpolyp. Z. wiss. Zool. 27 : 403-416., available online at http://www.biodiversitylibrary.org/item/135763#page/523/mode/1up
page(s): 403 [details]  OpenAccess publication 

original description  (ofTiarella singularis Schulze, 1876) Schulze, F.E., 1876. Tiarella singularis, ein neuer Hydroidpolyp. Z. wiss. Zool. 27 : 403-416., available online at http://www.biodiversitylibrary.org/item/135763#page/523/mode/1up
page(s): 415 [details]  OpenAccess publication 

additional source Bouillon, Jean; Medel, Maria Dolores; Pagès, Francesc; Gili, Josep-Maria; Boero, Ferdinando ; Gravili, Cinzia. (2004). Fauna of the Mediterranean Hydrozoa. Scientia Marina. 68: 5-438. (look up in IMIS[details]  OpenAccess publication 

additional source Vervoort, W.; Schuchert, P. & van der Land, J. (2000-2007). as a contribution to UNESCO-IOC Register of Marine Organisms. (look up in IMIS[details]   

additional source Petersen (1990)
page(s): 146, Fig. 15. [details]   

additional source Picard, J., 1958. Origines et affinités de la faune d'hydropolypes (Gymnoblastes et Calyptoblastes) et d'hydroméduses (Anthoméduses et Leptoméduses) de la Méditerranée. Rapp. P.-v. Réun. Commn int. Explor. scient. Mer Méditerr., 14: 187-199. [details]   

additional source Boero, F. & J. Bouillon, 1993. Zoogeography and life cycle patterns of Mediterranean hydromedusae (Cnidaria). Biol. J. Linn. Soc., 48(3): 239-266. (look up in IMIS[details]   

additional source Avian, M.; Boero, F.; Mills, C.E.; Rossi, L.; Rottini-Sandrini, L. (1995). Cnidaria, Ctenophora. Checklist delle specie della fauna italiana, 3. 1-38 pp. (look up in IMIS[details]   

additional source Rees. (1941).  [details]   

additional source Rees. (1957).  [details]   

redescription Vervoort, W., 1949. Notes on a small collection of hydroids from Jersey (Channel Islands). Zool. Meded., Leiden 30 11: 133-162.
page(s): Vervoort, 1949: 138, figs 1-2 [details]  Available for editors  PDF available [request] 

redescription Schuchert, P. (2006). The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Capitata Part 1. Revue suisse de Zoologie. 113: 325-410., available online at http://www.biodiversitylibrary.org/item/128494#page/101/mode/1up
page(s): 353 [details]  OpenAccess publication 

redescription Schuchert, P. 2012. North-West European Athecate Hydroids and their Medusae. Synopses of the British Fauna (New Series) 59. The Linnean Society of London, London, pp. i-viii, 1-364.
page(s): 86 [details]   
 
 Present  Inaccurate  Introduced: alien  Containing type locality 
 

From regional or thematic species database
Basionym Tiarella singularis Schulze, 1876. [details]

Biology Tricyclusa is a rather unique hydroid presenting a pedal disk comparable to what is found in some Limnomedusae hydroids (i.e. Oustromovia, Moerisia). In the northeastern Atlantic Tricyclusa appears in May-June attached to seaweeds and Zostera and they become generally very abundant during all spring period by forming asexual lateral polypoid buds resembling to actinulae giving rise to new colonies. The name actinulae, is however inadequate for these structure since they are merely polypoid buds, whereas true actinulae are sexual produce larvae. In July Tricyclusa gives rise to fixed gonophores and from August disappears during all winter. This seasonal appearance suggests that Tricyclusa has presumably an encysted winter stage, perhaps represented by the remaining of the pedal disk. [details]

Diagnosis Hydroid pear-shaped, with three whorls of capitate tentacles (oral, middle and proximal whorls). Between the middle and oral whorl the body narrows to form a slender neck. Four oral tentacles, each with a terminal knob of cnidocysts; six tentacles in the middle whorl; proximal whorl near the posterior end of the body, with 12 tentacles in two closely approximated whorls of six tentacles pointing upwards and six tentacles pointing downwards. Middle and proximal whorls of tentacles with two groups of cnidocysts on their distal half in addition to the terminal knob. Gonophores cryptomedusoids. [details]

Distribution Northeastern Atlantic. [details]

From other sources
Biology solitary on algae; gonophores [details]