Filellum cf. serratum

Moura, Carlos J., 2015, The hydrozoan fauna (Cnidaria: Hydrozoa) from the peaks of the Ormonde and Gettysburg seamounts (Gorringe Bank, NE Atlantic), Zootaxa 3972 (2), pp. 148-180 : 159

Filellum cf. serratum

(fig. 3G)

Lafoëa serrata Clarke, 1879: 242 , pl. 4 fig. 25.

Material studied. Ormonde, stn 1: few polyps found on the hydrocaulus of Aglaophenia kirchenpaueri ; DBUA 1516.03. Ormonde, stn 4: few polyps on cauli of Zonaria tournefortii , DBUA 1516.01. Gettysburg, stn 9: some polyps encrusting Zonaria tournefortii , DBUA 1516.02.

Remarks. Transversal perisarc ridges visible on the basal upper-parts of hydrothecae. The absence of coppinia impeded an accurate identification of this material. Furthermore, the type locality of Filellum serratum is Cuba and the recent molecular evidences of many cryptic diversity within the genus Filellum ( Moura et al. 2012b) increase doubt on the nominal identity of this taxon herein reported from the Gorringe.

The unique morphological traits of this biological material confirms it is a distinctive species not previously detected in the Gorringe.

Reported distribution. Dubious. Filellum serratum is regarded as cosmopolitan species but previous records of this nominal species likely correspond to a complex of species ( Peña Cantero et al. 1998; Marques et al. 2011; Moura et al. 2012b).