Lafoea dumosa
Creators
Description
Lafoea dumosa (Fleming, 1820)
(Fig. 6 i–j)
Material examined. ANT XV/3: 48-50, one colony, up to 55 mm high; 48-194, one colony, up to 50 mm high; 48- 276, one colony, up to 10 mm high, on Sc. nana; 48-297, one colony, up to 15 mm high, on B. subrufa and ascidian; ANT XVII/3: 111-5, one colony, up to 35 mm high, on O. terranovae; 111-6, one colony, up to 40 mm high; 111-18, some stems, up to 40 mm high, on O. terranovae and polychaete tube; 111-19, one colony, up to 20 mm high, on Sc. unifurcata; ANT XXI/2: PS65/121, some stems, up to 40 mm high, on Sc. nana and Sy. curvatus; PS65/278, one colony, up to 40 mm high, on H. secundum; PS65/279, one colony, up to 10 mm high, on sponge.
Remarks. Lafoea dumosa has been considered a cosmopolitan species with a wide range of variation in colony shape, pedicel length and hydrothecal morphology [see Schuchert (2001) for a detailed account on the taxonomic history of the species]. Some authors included Lafoea fruticosa (Sars, 1851) and Lafoea gracillima (Alder, 1856) within the synonymy of L. dumosa (e.g. Cornelius 1975; Peña Cantero et al. 2004). However, recent evidence have challenged these previous concepts. Schuchert (2001) found differences in nematocyst size between pedicellate and non-pedicellate colonies of L. dumosa, but some exceptions were noticed by the author. Moura et al. (2008) found two divergent lineages within L. dumosa, suggesting the existence of cryptic species. Finally, Calder (2012) tentatively considered L. fruticosa and L. gracillima as valid species waiting for further molecular work. Given that L. dumosa was originally described from Scotland bearing “nearly sessile cups” (Fleming 1828: 548; see also Cornelius 1975), the Antarctic representatives of Lafoea, often bearing long and twisted pedicels (figs 6i–j), might belong to a different species. However, in the absence of further molecular evidence, this issue remains open.
Ecology and distribution. In Antarctic waters, reported from 12 (Stepanjants 1979, as Lafoea fruticosa) to 1157 m depth (Peña Cantero 2014a); present material was collected between 65– 417 m. Worldwide distributed, known from both East and West Antarctica (Peña Cantero et al. 2004), as well as the Scotia Arc (Soto Àngel & Peña Cantero 2015).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Lafoeidae
- Genus
- Lafoea
- Kingdom
- Animalia
- Order
- Leptothecata
- Phylum
- Cnidaria
- Scientific name authorship
- Fleming
- Species
- dumosa
- Taxon rank
- species
- Taxonomic concept label
- Lafoea dumosa (Fleming, 1820) sec. Soto & Peña, 2019
References
- Fleming, J. (1820) Observations on the natural history of the Sertularia gelatinosa of Pallas. Edinburgh Philosophical Journal, 2, 82 - 89.
- Schuchert, P. (2001) Hydroids of Greenland and Iceland (Cnidaria, Hydrozoa). Meddelelser om GrOnland, Bioscience, 53, 1 - 184.
- Cornelius, P. F. S. (1975) A revision of the species of Lafoeidae and Haleciidae (Coelenterata: Hydroida) recorded from Britain and nearby seas. Bulletin of the British Museum (Natural History), Zoology, 28, 375 - 426.
- Moura, C. J., Harris, D. J., Cunha, M. R. & Rogers, A. D. (2008) DNA barcoding reveals cyptic diversity in marine hydroids (Cnidaria, Hydrozoa) from coastal and deep-sea environments. Zoologica Scripta, 37, 93 - 108. https: // doi. org / 10.1111 / j. 1463 - 6409.2007.00312. x
- Calder, D. (2012) On a collection of hydroids (Cnidaria, Hydrozoa, Hydroidolina) from the west coast of Sweden, with a checklist of species from the region. Zootaxa, 3171, 1 - 77. http: // dx. doi. org / 10.11646 / zootaxa. 3171.1.1
- Fleming, J. (1828) A history of British animals, exhibiting the descriptive characters and systematical arrangement of the genera and species of quadrupeds, birds, reptiles, fishes, Mollusca, and Radiata of the United Kingdom. Bell & Bradfute, Edinburgh, 565 pp.
- Stepanjants, S. D. (1979) Hydroids of the antarctic and subantarctic waters. In: Biological results of the Soviet Antarctic Expedition, 6. Issledovaniya Fauny Morei, 20, 1 - 200. [in Russian]
- Pena Cantero, A. L. (2014 a) Benthic hydroids (Cnidaria, Hydrozoa) from the continental shelf and slope off Queen Mary Coast (East Antarctica). Polar Biology, 37, 1711 - 1731. https: // doi. org / 10.1007 / s 00300 - 014 - 1556 - 0
- Soto Angel, J. J. & Pena Cantero, A. L. (2015) On the benthic hydroids from the Scotia Arc (Southern Ocean): new insights into their biodiversity, ecology and biogeography. Polar Biology, 38, 983 - 1007. https: // doi. org / 10.1007 / s 00300 - 015 - 1660 - 9