Eudendrium annulatum Norman, 1864

Picture: Fig. 1

Picture: Fig. 2

DESCRIPTION

Colonies large, stems and branches polysiphonic with bark-like covering formed by a layer of coalesced stolonal tubes (Fig.1). Hydranths large (>0.4 mm diameter), with 16-22 tentacles. Perisarc thick, often annulated (Fig.2). Gonophores on short pedicels, often in aggregations on upper side of monosiphonic hydrocladia, with distal nematocyst buttons. Male sporosacs densly grouped on pedicels. Female gonophores with curved spadix in clusters on atrophied hydranths or on pedicels.

Nematocysts: in hydranths large microbasic euryteles located in the basal ring; in tentacles - small microbasic euryteles.

DISTRIBUTION IN SVALBARD

Heleysundet, Hornsund

WORLD DISTRIBUTION

Greenland, Norway, White Sea, Barents Sea, Kara Sea, Bering Sea, Japan

DEPTH

5-147 m

SUBSTRATE

algae, rock

REPRODUCTION

fixed gonophores

present