Clytia elsaeoswaldae Stechow 1914
Creators
Description
Clytia elsaeoswaldae Stechow, 1914
Fig. 15e
Clytia elsae-oswaldae Stechow, 1914: 125, fig. 4.
Type locality. U.S. Virgin Islands: St. Thomas, Charlotte Amalie (Stechow 1914).
Voucher material. Off St. Lucie Inlet, 27°10.7’N, 80°02.7’W, on Eudendrium carneum, 23 m, vii.1975, Johnson-Sea-Link, JSL 274, one colony, up to 4 mm high, with gonophores, coll. T. Askew, ROMIZ B1134.
Remarks. Lindner et al. (2011) have been followed in recognizing Clytia elsaeoswaldae Stechow, 1914 (type locality: St. Thomas) as distinct from Clytia gracilis (M. Sars, 1850) (type locality: Norway). Suspicions had been raised earlier, on zoogeographic grounds, that the two might be distinct (Calder 1991a: 57). As with material of Lindner et al. from Brazil and type material from the U.S. Virgin Islands, gonothecae of hydroids from Florida examined here were borne on the stolons or mostly so. The species appears to be endemic to shallow-waters of the warm western Atlantic. Material earlier identified as C. gracilis by me (Calder 1991a) from Bermuda is referable to the same species. A phylogenetic analysis by Lindner et al. (2011) indicates that C. elsaeoswaldae is related phylogenetically to C. hemisphaerica (Linnaeus, 1758) and to several species resembling C. gracilis.
Clytia elsaeoswaldae is distinguished in part by the following combination of characters: (1) colonies are stolonal, or erect with monosiphonic and dichotomously branched hydrocauli; (2) hydrothecae have about 9–14 cusps that are usually inclined to the right when viewed laterally; (3) gonothecae tend to arise from the hydrorhiza, and have smooth to slightly undulated walls (Lindner et al. 2011).
The hydroid examined here was growing as an epizoite on a stem of Eudendrium carneum Clarke, 1882. Its stolons were entangled with those of a colony of C. linearis (Thornely, 1900), discussed below.
Reported distribution. Atlantic coast of Florida. First record.
Western Atlantic. Bermuda (Calder 1991a, as Clytia gracilis) to Brazil (Oliveira et al. submitted), and including the Caribbean Sea (Stechow 1914).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- ROMIZ
- Family
- Campanulariidae
- Genus
- Clytia
- Kingdom
- Animalia
- Material sample ID
- B1134
- Order
- Leptothecata
- Phylum
- Cnidaria
- Scientific name authorship
- Stechow
- Species
- elsaeoswaldae
- Taxon rank
- species
- Type status
- holotype
- Taxonomic concept label
- Clytia elsaeoswaldae Stechow, 1914 sec. Calder, 2013
References
- Stechow, E. (1914) Zur Kenntnis neuer oder seltener Hydroidpolypen, meist Campanulariden, aus Amerika und Norwegen. Zoologischer Anzeiger, 45, 120 - 136.
- Lindner, A., Govindarajan, A. F. & Migotto, A. E. (2011) Cryptic species, life cycles, and the phylogeny of Clytia (Cnidaria: Hydrozoa: Campanulariidae). Zootaxa, 2980, 23 - 36.
- Sars, M. (1850) Beretning om en i Sommeren 1849 foretagen zoologisk Reise i Lofoten og Finmarken. Nyt Magazin for Naturvidenskaberne, 6, 121 - 211.
- Calder, D. R. (1991 a) Shallow-water hydroids of Bermuda. The Thecatae, exclusive of Plumularioidea. Royal Ontario Museum, Life Sciences Contributions, 154, 1 - 140.
- 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.
- Clarke, S. F. (1882) New and interesting hydroids from Chesapeake Bay. Memoirs of the Boston Society of Natural History, 3, 135 - 142.
- Thornely, L. R. (1900) The hydroid zoophytes collected by Dr Willey in the southern seas. In: Willey, A., Zoological Results based on material from New Britain, New Guinea, Loyalty Islands and elsewhere. Part IV. Cambridge University Press, Cambridge, pp. 451 - 457.