Phialella belgicae ( Hartlaub, 1904 )

Soto, Joan J. & Peña, Álvaro L., 2019, Benthic hydroids (Cnidaria, Hydrozoa) from the Weddell Sea (Antarctica), Zootaxa 4570 (1), pp. 1-78 : 25

Phialella belgicae ( Hartlaub, 1904)

( Fig. 7d )

Material examined. ANT XV/3: 48-27, several hydrothecae, on E. generale , H. exaggeratum , S. lobata , Sy. anae and Sy. glacialis ; 48-33, several hydrothecae, on C. hicksoni and O. terranovae ; 48-36, some hydrothecae, on O. terranovae ; 48-39, several hydrothecae, on dead octocoral; 48-44, some hydrothecae, on A. elongatus , Sy. naumovi and bryozoan; 48-50, numerous hydrothecae, on C. hicksoni , H. secundum , Sc. nana and bryozoan; 48-63, some hydrothecae, on Staurotheca frigida Peña Cantero, Svoboda & Vervoort, 1997 ; 48-77, numerous hydrothecae, on H. jaederholmi ; 48-82, numerous hydrothecae, on B. subrufa , Sy. glacialis and Staurotheca polarsterni Peña Cantero, Svoboda & Vervoort, 1997 ; 48-168, two hydrothecae, on Sy. weddelli ; 48-220, numerous hydrothecae and erect stems, up to 2.5 mm high, on C. hicksoni , H. interpolatum , Sc. nana , Sy. exochus and Sy. plectilis ; 48-276, several hydrothecae, on C. hicksoni , Halecium cf. antarcticum and Sc. nana ; ANT XVII/3: 111-7, several hydrothecae, on O. terranovae and Sy. cumberlandicus ; 111-9, numerous hydrothecae, on A. grandis , E. generale , R. antarcticum and T. longstaffi ; 111-19, some hydrothecae, on H. interpolatum and Tubularia sp.1; ANT XXI/2: PS65/39, some hydrothecae, on Sc. nana , Sy. exochus and polychaete tube, with gonothecae; PS65/121, few hydrothecae, on Antarctoscyphus spiralis ( Hickson & Gravely, 1907) ; PS65/132, some hydrothecae, on B. subrufa ; PS65/175, three hydrothecae, on A. elongatus ; PS65/237, several hydrothecae, on Halecium cf. antarcticum , Sc. nana and Sy. glacialis ; PS65/248, one hydrotheca, on indeterminate hydrorhiza; PS65/274, several hydrothecae, on St. nonscripta ; PS65/278, few hydrothecae, on H. secundum and sponge; PS65/281, some hydrothecae, on Sy. curvatus ; PS65/292, several hydrothecae, on dead octocoral and bryozoan; PS65/336, some hydrothecae, on Staurotheca pachyclada ( Jäderholm, 1904) .

Ecology and distribution. Species previously reported from the low tide ( Billard 1914, as Campanulina belgicae ) to 779 m depth ( Peña Cantero 2014a); present material was collected from 62 to 598 m. Probably a Pan- Antarctic species (Peña Cantero et al. 2013).

Figures

FIGURE 7. a Lafoeina longitheca: hydrotheca. b–c Stegella lobata: b stem showing hydrothecal arrangement; c gonotheca. d Phialella belgicae: hydrotheca. e–h Campanularia hicksoni: e general view of the colony; f hydrotheca; g pioneer polyp showing planula attachment; h gonotheca. i–j Campanularia sp.: i hydrotheca; j developing gonotheca. k–m Billardia subrufa: k general view of a colony growing on Oswaldella erratum; l stem showing hydrothecal arrangement; m gonothecae.