Lafoea dumosa

• Main Authors: Soto, Joan J., Peña, Álvaro L.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Lafoeidae; Lafoea; Lafoea dumosa; Antarc*; Antarctic
• Online Access: https://doi.org/10.5281/zenodo.5934919; http://treatment.plazi.org/id/03B887B7A478FFE4E983FC65FEC69DA0

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 ...