Filellum plicatum ( Hartlaub, 1904 )

Marques, Antonio C., Peña, Álvaro L., Miranda, Thaís P. & Migotto, Alvaro E., 2011, Revision of the genus Filellum Hincks, 1868 (Lafoeidae, Leptothecata, Hydrozoa), Zootaxa 3129, pp. 1-28 : 24

Filellum plicatum ( Hartlaub, 1904)

Lafoea plicata Hartlaub, 1904: 12 , pl. 2, fig. 3.

Type series. Holotype—“the material … is lost” ( Peña Cantero et al. 2004b: 2287).

Type locality. From the original description, “Schwabber VIII”, “N° 923”, Antarctic, 70°00’S; 80°48’W, 55 m, 18 October 1898 ( Hartlaub 1904: 12).

Remarks. Lafoea plicata was originally described by Hartlaub (1904), who remarked on the resemblance of his species with F. serratum based on the adnate part of the hydrotheca being surrounded by a thin membrane provided with fine pleats resembling indentations in lateral view (see also Peña Cantero et al. 2004b: 2287). The type material was infertile and is reportedly lost. According to Peña Cantero et al. (2004b: 2287) “the size of the hydrothecae in L. plicata is closer to that of the material here considered as F. antarcticum (e.g. 104–111 mm diameter at the aperture)”. However, based on the lack of diagnostic characters of the trophosome, we decided to consider this taxon as species inquirenda.