Tridentata loculosa
Creators
Description
Tridentata loculosa (Busk, 1852)
Fig. 9d
Sertularia loculosa Busk, 1852: 393.
Type locality. Australia: Bass Strait (Busk 1852: 393).
Voucher material. Off Fort Pierce Inlet, 27°28.8’N, 80°14.5’W, 15 m, 13.ii.1974, R/ V Gosnold Station 220/ 224, 10-foot otter trawl, four colony fragments, on bryozoans and algae, up to 1.3 cm high, without gonophores, ROMIZ B1078.
Remarks. Contrary to information in synonymy lists of several papers reporting on this species, the original description of Sertularia loculosa by Busk (1852) was not accompanied by illustrations. Busk’s unfortunate omission of them led to much confusion over the identity and synonymy of the species. The first published figures of S. loculosa were by Bale (1884: pl. 4, figs. 5–6, pl. 9, fig. 12, pl. 19, fig. 9), drawn from sketches sent to him by Busk, but they too were misleading in that they showed pronounced marginal cusps bordering the rim of each hydrotheca. Those inaccurate drawings led Billard (1909) to mistakenly assume that S. loculosa was conspecific with S. turbinata (Lamouroux, 1816). A more representative drawing of S. loculosa, based on type material, was not published until later (Bale 1913, pl. 12, fig. 6, under S. turbinata). Problems surrounding the history and synonymy of the species were reviewed and clarified by Billard (1927), who concluded that S. loculosa was indeed valid and that S. ligulata Thornely, 1904 was identical to it. Migotto (1996) examined type material and confirmed the identity and validity of the species.
A strap-like “ligula” or nematophore, extending from the adcauline side of the hydranth and curving towards the hydrothecal orifice, is diagnostic of the species. It was poorly preserved in most hydranths of the colony examined here.
Sertularia loculosa has been assigned here provisionally to Tridentata Stechow, 1920. Besides the presence of a characteristic ligula, marginal cusps are inconspicuous and the valves of the operculum differ greatly in size, as noted by Schuchert (2003). Molecular studies are needed to better establish its generic identity. It is clearly not congeneric with Sertularia argentea Linnaeus, 1758, type species of Sertularia Linnaeus, 1758.
Reported distribution. Atlantic coast of Florida. First record.
Western Atlantic. Florida (this study) to Brazil (Oliveira et al. submitted, as Sertularia loculosa), including Bermuda (Calder 2000) and the Caribbean Sea (Calder & Kirkendale 2005; Galea 2008, as S. loculosa).
Elsewhere. Warm eastern Atlantic; Indo-Pacific (Schuchert 2003, S. loculosa).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- ROMIZ
- Event date
- 1974-02-13
- Family
- Sertulariidae
- Genus
- Tridentata
- Kingdom
- Animalia
- Material sample ID
- B1078
- Order
- Leptothecata
- Phylum
- Cnidaria
- Scientific name authorship
- Busk
- Species
- loculosa
- Taxon rank
- species
- Type status
- holotype
- Verbatim event date
- 1974-02-13
- Taxonomic concept label
- Tridentata loculosa (Busk, 1852) sec. Calder, 2013
References
- Busk, G. (1852) Appendix IV. An account of the Polyzoa, and sertularian zoophytes, collected in the voyage of the Rattlesnake, on the coasts of Australia and the Louisiade Archipelago, & c. In: Macgillivray, J. (Ed.), Narrative of the voyage of H. M. S. Rattlesnake, commanded by the late Captain Owen Stanley, R. N., F. R. S. & c., during the years 1846 - 1850. Vol. 1. T. & W. Boone, London, pp. 343 - 402.
- Bale, W. M. (1884) Catalogue of the Australian hydroid zoophytes. Australian Museum, Sydney, 198 pp.
- Billard, A. (1909) Revision des especes types d'hydroides de la collection Lamouroux conservee a l'Institut Botanique de Caen. Annales des Sciences Naturelles, 9 e serie, Zoologie, 9, 307 - 336.
- Lamouroux, J. V. F. (1816) Histoire des polypiers coralligenes flexibles, vulgairement nommes zoophytes. F. Poisson, Caen, 560 pp.
- Bale, W. M. (1913) Further notes on Australian hydroids. - II. Proceedings of the Royal Society of Victoria, new series, 26, 114 - 147.
- Billard, A. (1927) Question de synonymie (Sertularia turbinata, S. loculosa, S. ligulata). Bulletin de la Societe Zoologique de France, 51, 512 - 513.
- Thornely, L. R. (1904) Report on the Hydroida collected by Professor Herdman, at Ceylon, in 1902. In: Herdman, W. A., Report to the Government of Ceylon on the pearl oyster fisheries of the Gulf of Manaar, with supplementary reports upon the marine biology of Ceylon. Part 2, pp. 107 - 126.
- Migotto, A. E. (1996) Benthic shallow-water hydroids (Cnidaria, Hydrozoa) of the coast of Sao Sebastiao, Brazil, including a checklist of Brazilian hydroids. Zoologische Verhandelingen, 306, 1 - 125.
- Stechow, E. (1920) Neue Ergebnisse auf dem Gebiete der Hydroidenforschung. Sitzungsberichte der Gesellschaft fur Morphologie und Physiologie in Munchen, 31, 9 - 45.
- Schuchert, P. (2003) Hydroids (Cnidaria, Hydrozoa) of the Danish expedition to the Kei Islands. Steenstrupia, 27, 137 - 256.
- Linnaeus, C. (1758) Systema naturae per regna tria naturae, secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis. Editio decima, reformata. Laurentii Salvii, Holmiae, 823 pp.
- Calder, D. R. (2000) Assemblages of hydroids (Cnidaria) from three seamounts near Bermuda in the western North Atlantic. Deep-Sea Research I, 47, 1125 - 1139. http: // dx. doi. org / 10.1016 / S 0967 - 0637 (99) 00093 - X
- Calder, D. R. & Kirkendale, L. (2005) Hydroids (Cnidaria, Hydrozoa) from shallow-water environments along the Caribbean Coast of Panama. Caribbean Journal of Science, 41, 476 - 491.
- Galea, H. R. (2008) On a collection of shallow-water hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles. Zootaxa, 1878, 1 - 54.