Ophiodiscus bukini N. Sanamyan, K. Sanamyan, Galkin, Ivin et Bocharova, 2021

Sanamyan, N. P., Sanamyan, K. E., Bocharova, E. S., Morozov, T. B. & Galkin, S. V., 2023, Sea anemones (Actiniaria, Corallimorpharia and Zoantharia) from the Western Bering Sea (Northwest Pacific), Invertebrate Zoology 20 (1), pp. 27-56 : 36

Ophiodiscus bukini N. Sanamyan, K. Sanamyan, Galkin, Ivin et Bocharova, 2021

Fig. 3B .

Ophiodiscus bukini Sanamyan et al., 2021: 427 .

MATERIAL. LV-75-21, 55.4796ºN 167. 2534ºE – 55.4751ºN 167.2523ºE, depth 2810– 2673 m, one specimen collected (sample 9) and three specimens photographed.

REMARKS. Large disc-shaped sea anemone freely lying on the bottom. The short column is completely hidden under the oral disc, about 20 cm in diameter. Short, conical, with pointed tips tentacles are all of the same shape and arranged in a single cycle on the margin of the disc, that makes this anemone unusually looking and easily recognizable in underwater photographs. Its shape somewhat resembles Sicyonis heliodiscus Sanamyan et al., 2015 , another disc-shaped species recently described from material collected by Monterey Bay Aquarium Research Institute ( USA) in the eastern Pacific Ocean ( Sanamyan et al., 2015a). Sicyonis heliodiscus , however, has much more numerous tentacles and they are blunt and arranged in two cycles. Four specimens Ophiodiscus bukini were photographically documented on the soft bottom and also on the rock covered by sediment on the northern slope of the Vulcanologov Massif at 2673–2810 m. This depth rang between the bathyal and abyssal zones is stated to be the depth of the largest community changes, or the largest turnover of dominant species in this region (see Rybakova et al., 2020).

Figures

Fig. 3. A — Sicyonis sp.; B — Ophiodiscus bukini; C — Actinostola faeculenta; D — Actinostola sp.1; E — Actinostola sp.2; F — Actinostola sp.3; G — Actinostola sp.4; H — Actinostola sp.5 (photo of N. Sanamyan); I — Stomphia sp.; J — Tealidium konoplinorum; K — cf. Halcampa sp. from the northern slope of the Piip Volcano; L — cf. Halcampa sp. from the southern slope of the Piip Volcano. Рис. 3. A — Sicyonis sp.; B — Ophiodiscus bukini; C — Actinostola faeculenta; D — Actinostola sp.1; E — Actinostola sp.2; F — Actinostola sp.3; G — Actinostola sp.4; H — Actinostola sp.5 (фото Н. СанамЯн); I — Stomphia sp.; J — Tealidium konoplinorum; K — cf. Halcampa sp. на северном склоне вулкана Пийпа; L — cf. Halcampa sp. на южном склоне вулкана Пийпа.