WoRMS taxon details
Tricyclusa singularis (Schulze, 1876)
235735 (urn:lsid:marinespecies.org:taxname:235735)
accepted
Species
Margelopsis stylostoma Hartlaub, 1903 · unaccepted (synonym)
Tiarella singularis Schulze, 1876 · unaccepted (basionym)
marine, brackish, fresh, terrestrial
recent only
(of Tiarella singularis Schulze, 1876) Schulze, F.E. (1876). <i>Tiarella singularis</i>, ein neuer Hydroidpolyp. <em>Zeitschrift für wissenschaftliche Zoologie.</em> 27: 403-416., available online at https://www.biodiversitylibrary.org/page/42626593
page(s): 403, pls 29-30 [details]
page(s): 403, pls 29-30 [details]
Distribution Northeastern Atlantic.
Distribution Northeastern Atlantic. [details]
Schuchert, P. (2024). World Hydrozoa Database. Tricyclusa singularis (Schulze, 1876). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=235735 on 2024-04-18
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original description
(of Tiarella singularis Schulze, 1876) Schulze, F.E. (1876). <i>Tiarella singularis</i>, ein neuer Hydroidpolyp. <em>Zeitschrift für wissenschaftliche Zoologie.</em> 27: 403-416., available online at https://www.biodiversitylibrary.org/page/42626593
page(s): 403, pls 29-30 [details]
original description (of Margelopsis stylostoma Hartlaub, 1903) Hartlaub C. (1903). Dendy, A., On a free-swimming hydroid, Pelagohydra mirabilis n. g., n. sp. <em>Zoologisches Zentralblatt.</em> 10: 27-34., available online at https://biodiversitylibrary.org/page/1784107
page(s): 28, fig. 2 [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. <em>Rapports et Procès-Verbaux Réunion Commission Internationale pour l'Exploration scientifique de la Mer Méditerranée.</em> 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 Rees. (1941). [details]
additional source Rees. (1957). [details]
additional source Avian, M.; Boero, F.; Mills, C.; Rossi, L.; Rottini-Sandrini, L. (1995). Cnidaria, Ctenophora. <em>In: Checklist delle specie della Fauna Italiana a cura di A. Minelli, S. Ruffo, S. La Posta.</em> 3: 1-38. (look up in IMIS) [details] Available for editors
[request]
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 Bouillon, Jean; Medel, Maria Dolores; Pagès, Francesc; Gili, Josep-Maria; Boero, Ferdinando ; Gravili, Cinzia. (2004). Fauna of the Mediterranean Hydrozoa. <em>Scientia Marina.</em> 68: 5-438. (look up in IMIS) [details]
redescription Schuchert, P. (2006). The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Capitata Part 1. <em>Revue suisse de Zoologie.</em> 113: 325-410., available online at https://www.biodiversitylibrary.org/page/41227513
page(s): 353 [details]
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] Available for editors [request]
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 [request]
page(s): 403, pls 29-30 [details]
original description (of Margelopsis stylostoma Hartlaub, 1903) Hartlaub C. (1903). Dendy, A., On a free-swimming hydroid, Pelagohydra mirabilis n. g., n. sp. <em>Zoologisches Zentralblatt.</em> 10: 27-34., available online at https://biodiversitylibrary.org/page/1784107
page(s): 28, fig. 2 [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. <em>Rapports et Procès-Verbaux Réunion Commission Internationale pour l'Exploration scientifique de la Mer Méditerranée.</em> 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 Rees. (1941). [details]
additional source Rees. (1957). [details]
additional source Avian, M.; Boero, F.; Mills, C.; Rossi, L.; Rottini-Sandrini, L. (1995). Cnidaria, Ctenophora. <em>In: Checklist delle specie della Fauna Italiana a cura di A. Minelli, S. Ruffo, S. La Posta.</em> 3: 1-38. (look up in IMIS) [details] Available for editors
[request] 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 Bouillon, Jean; Medel, Maria Dolores; Pagès, Francesc; Gili, Josep-Maria; Boero, Ferdinando ; Gravili, Cinzia. (2004). Fauna of the Mediterranean Hydrozoa. <em>Scientia Marina.</em> 68: 5-438. (look up in IMIS) [details]
redescription Schuchert, P. (2006). The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Capitata Part 1. <em>Revue suisse de Zoologie.</em> 113: 325-410., available online at https://www.biodiversitylibrary.org/page/41227513
page(s): 353 [details]
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] Available for editors
[request] 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
[request] 
Present Present in aphia/obis/gbif/idigbio 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]
