Symplectoscyphus cumberlandicus (Jaderholm 1905)
- Dataset
- Additions to knowledge of the biodiversity of benthic hydroids (Cnidaria: Hydrozoa) in the Balleny Islands (Antarctica)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Cnidaria
- class
- Hydrozoa
- order
- Leptothecata
- family
- Sertulariidae
- genus
- Symplectoscyphus
- species
- Symplectoscyphus cumberlandicus
biology_ecology
Ecology and distribution. Present material, the first record of Symplectoscyphus cumberlandicus from the Balleny Islands, was collected at depths between 63 and 108 m off Young and Sturge islands. Gonothecae in material collected in March.
description
(Fig. 2 A – B)
description
Measurements (in µm). Hydrotheca: length abcauline wall 350 – 450, length free part of adcauline wall 140 – 200, length adnate part of adcauline wall 370, length adcauline wall 510 – 570, diameter at aperture 160 – 200.
discussion
Remarks. The polysiphonic stem, branched in one plane, and the shape and size of hydrothecae (Fig. 2 A) and gonothecae (Fig. 2 B), the latter with about 13 spirally arranged rings, make certain the identification of the material from TAN 0602 / 448. The material from TAN 0602 / 420, although consisting of small stems up to 10 mm high, also agrees in the shape and size of the hydrothecae. One of the stems has, in addition, a basal 3 - mm-long stolon, pointing to the polysiphonic condition found in larger stems.
materials_examined
Material examined. TAN 0602 / 420, three stems up to 10 mm high (NIWA 144240); TAN 0602 / 448, one stem 100 mm high, with gonothecae (NIWA 144241).