Filellum serratum
Creators: name: Gil, Marta
name: Ramil, Fran
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Cnidaria
Hydrozoa
Leptothecata
Lafoeidae
Filellum
Filellum serratum

description: Filellum cf. serratum (Clarke, 1879)
Lafoea serrata Clarke, 1879: 242, pl. 4 fig. 25.
Filellum serratum:? Millard, 1975: 178, fig. 59A–C.— Millard, 1978: 177.— Hirohito, 1995: 110–112, fig. 31A–C.—Calder, 1998: 1852–1853.— Peña Cantero et al., 1998: 304–308, figs 1–2.— Marques et al., 2011.
Filellum cf. serratum: Ramil & Vervoort, 1992a: 54–55.— Vervoort, 2006: 231–232.—Gil et al.,. 2020: 423–425, fig. 2C–E.
Material examined. BISSAU-0810, stn BS147, 11º08'35"– 11º08'27"N, 17º11'31"– 17º10'37"W, 186–306 m, 26-X-2008: one colony without coppiniae, growing on Nemertesia ramosa.
BISSAU-0810, stn BS152, 10º31'12"– 10º30'19"N, 17º12'34"– 17º12'32"W, 300–305 m, 27-X-2008: three colonies without coppiniae, of which one growing on Lytocarpia myriophyllum and the two others on Aglaophenia lophocarpa.
BISSAU-0810, stn BS191, 10º18'25"– 10º19'20"N, 16º08'47"– 16º08'47"W, 24–25 m, 3-XI-2008: 183 colonies without coppiniae, of which 125 growing on bryozoans, 13 on unidentified hydroids, 12 on Eudendrium capillare, 10 on Idiellana pristis, four on Diphasia digitalis, two on Bimeria vestita, two on Amphisbetia distans, one on Garveia nutans, one on Sertularella sp., one on Tridentata marginata, one on Tridentata loculosa, one on Obelia dichotoma, and one on a crustacean.
BISSAU-0810, stn BS195, 10º22'44"– 10º23'22"N, 16º15'37"– 16º16'18"W, 29 m, 3-XI-2008: seven colonies without coppiniae, of which six growing on an unidentified hydroid.
BISSAU-0810, stn BS200, 10º18'55"N, 16º25'07"W, 79 m, 4-XI-2008: two colonies without coppiniae, growing on Sertularelloides cylindritheca.
BISSAU-0810, stn BS226, 11º22'11"– 11º21'55"N, 17º02'30"– 17º01'54"W, 35–37 m, 9-XI-2008: one colony without coppiniae, growing on Halecium halecinum.
Remarks. The present material is consistent with that described by Gil et al. (2020), also as Filellum cf. serratum, and represents the first record of this species for Guinea-Bissau.
Biology. Filellum serratum has been found growing on a wide variety of invertebrates, mainly hydroids (Peña Cantero et al. 1998; Vervoort 2006; Gil et al. 2020). In the northern hemisphere, fertile material has been found in July and August (Peña Cantero et al. 1998), while in the southern hemisphere, coppinae were found in March (Ritchie 1911).
In our material, colonies were found growing on hydroids, bryozoans and crustaceans. Coppinae were not observed.
Distribution. Filellum serratum is considered as a circumglobal species (Peña Cantero et al. 1998); nevertheless, some records based on sterile material are doubtful (Vervoort 2006; Gil et al. 2020). In West Africa, it has been recorded from the Canary Islands (Vervoort 2006), Mauritania (Gil & Ramil 2017a; Gil et al. 2020) and the Cape Verde Archipelago (Vervoort 2006). Its bathymetric distribution ranges from 0–2000 m (Millard 1978; Calder 1998).
Our material was collected at depths between 24–306 m.
Genus Lafoea Lamouroux, 1821
description: Published as part of Gil, Marta & Ramil, Fran, 2025, Hydroids (Cnidaria, Hydrozoa) from Guinea Bissau, pp. 1-89 in Zootaxa 5577 (1) on page 23, DOI: 10.11646/zootaxa.5577.1.1, http://zenodo.org/record/14763362