Calcigorgia gigantea

Matsumoto, Asako K., Van Ofwegen, Leen P. & Bayer, Frederick M., 2019, A revision of the genus Calcigorgia (Cnidaria, Octocorallia, Acanthogorgiidae) with the description of three new species, Zootaxa 4571 (1), pp. 1-27: 6

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Calcigorgia gigantea

sp. n.

Calcigorgia gigantea  sp. n.

Figures 1aView FIGURE 1, 2View FIGURE 2 c–d, 4–5 7050EC0C-7AE5-439C-AE76-3997997ABEFC

Material examined. Holotype, USNM 1013069View Materials, Tanaga Pass west of Tanaga Island , Andreanof Islands , Aleutian Islands , Bering Sea , 51°N 137.64'N 178°19.2'W, depth 375 m, bottom temp. 4 °C, F/ V Pacific Knight, cruise 94-1, haul 121, 5 July, 1994 ( Figure 2cView FIGURE 2); paratypes USNM 1004615View Materials Amchitka Pass , Rat Islands , Aleutian Islands , 51.2885°N 178.947°E, depth 347–391 m, field number AB01-65, coll. McCluskey, P. ( Figure 2dView FIGURE 2); USNM 1010177View Materials, Semisopochnoi Island , Rat Islands , Aleutian Islands, West Bering Sea, 52.1756°N 179.608°E, depth 128–135 m, R/ V Dominator, st. 135, 24 June 2000.GoogleMaps 

Description. The holotype is 7 cm wide and 10 cm high ( Figure 2cView FIGURE 2). The stem is 2 cm long and about 6 mm wide. The polyps are about 9–10 mm high and 5–6 mm wide. Tentacles without sclerites. Polyps with poorly developed clubs ( Figure 4aView FIGURE 4), up to 0.60 mm long and spindles up to 0.90 mm long ( Figure 4View FIGURE 4 b–c); all with simple tubercles. The coenenchyme with smaller spindles, 0.20–0.50 mm long, with more developed tubercles ( Figure 4cView FIGURE 4).

Etymology. From the Latin gigantea  , giant or very large, referring to the large polyps and sclerites

Colour. The preserved holotype is white, all sclerites are colorless.

Distribution. Aleutian Islands, both East and West Bering Sea in 128–391 m ( Figure 1aView FIGURE 1).

Remarks. The colony of USNM1004615 is rather slender and has smaller polyps than the holotype ( Figure 2dView FIGURE 2) but its polyp sclerites ( Figure 5View FIGURE 5 a–b) are very much like those of the holotype. The coenenchyme has smaller spindles, up to 0.20 mm long, and some capstans ( Figure 5cView FIGURE 5). Calcigorgia gigantea  sp. n. is unique in the genus by its large polyps and sclerites.