Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica)
Author
Peña Cantero, Álvaro L.
Author
Marzal, Marina Fresneda
text
Zootaxa
2018
2018-06-26
4441
1
121
136
journal article
29821
10.11646/zootaxa.4441.1.7
0535eaeb-2e3b-4b6d-9ced-58a61fd02e03
1175-5326
1301927
2D48BC12-329C-4476-BF43-4648B4807E3B
Staurotheca nonscripta
Peña Cantero,
Svoboda & Vervoort, 1997a
(
Fig. 3B
)
Staurotheca nonscripta
—Peña
Cantero & Vervoort, 2003
:
2696
–2698, fig. 13 (synonymy).
Material examined.
48EV194
, fragments up to
22 mm
long, with male and female gonothecae (IK–2012–10435), and a mass of stems
70 mm
in diameter, with male and female gonothecae (IK–2009–0300).
Description.
Compact monosiphonic colonies consisting of a mass of stems and branches irregularly branched in several planes, up to
70 mm
in diameter. With anastomoses. Hydrothecae arranged in decussate pairs, forming four longitudinal rows, immersed into the branches for approXimately one-quarter of their volume and strongly curving outwards. Adcauline hydrothecal wall with a considerable free portion (
Fig. 3B
), adnate to internode for half or slightly more of its length. Free part of adcauline wall straight or slightly conveX; abcauline wall concave. Hydrothecal aperture circular; rim even and usually with numerous renovations. Gonothecae inserting at hydrothecal base. Female
gonotheca
urn-shaped; basal part ovoid, distally contracted into a short neck with distal aperture. Male
gonotheca
fusiform, with cone-shaped neck provided with a small, circular aperture.
Ecology and distribution.
Our material was collected at depths between 325 and
409 m
, basibiont of
Bimeria corynopsis
and
Campanularia hicksoni
and with gonothecae in December. Antarctic-Patagonian distribution (Peña
Cantero & Vervoort 2003
).