Halcampidae Andres, 1883

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 : 41

Family Halcampidae Andres, 1883

cf. Halcampa spp.

Fig. 3K, L .

MATERIAL. LV-75-21, 55.496°N 167.272ºE – 55.4875ºN 167.2600ºE, depth 2990– 2927 m, three specimens photographed.

LV-82-5, 55.2696ºN 167.2994ºE – 55.2700°N 167.2991ºE, depth 3526– 3494 m, three specimens photographed; LV-82-6, 55.6980ºN 167.1262ºE – 55.6946ºN 167.1238ºE, depth 3906– 3753 m, two specimens photographed. LV-82-19, 61.1544°N 175. 4507ºE – 61.1570°N 175.4463ºE, depth 699– 693 m, seven specimens photographed.

REMARKS.Small (up to 2 cm in diameter of the tentacular crown) burrowing anemones living on soft bottom. Most part of the body is hidden in the mud, and only the most distal part of the column and small oral disc with small number of the tentacles are visible on the surface. Three species of this genus can be recognized in the photographs: two abyssal species and one bathyal species. Both abyssal species are white. One of them, recorded on the northern slope of the Vulcanologov Massif in 2016 at 2927– 2990 m (three specimens, Fig. 3K ), has ten tentacles. Another, photographed on the southern slope of the Vulcanologov Massif and in the Komandorsky Basin west of the Komandor Graben in 2018 at 3494– 3906 m (five specimens, Fig. 3L ) has eight tentacles. Bathyal species is white-beige with eight transparent tentacles with white tips, very inconspicuous. It was recorded on the Koryak slope in the West Bering Sea in 2018 at 693–699 m (seven specimens). Unfortunately, specimens were not collected and their assignment to Halcampa is tentative. The species with ten tentacles may belong to the genus Parahalcampa , to which only one shallow-water species from South Atlantic, P. antarctica Carlgren, 1927 , currently assigned.

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.