Aplidium eborinum Sanamyan & Sanamyan, 2011, n. sp.

• Main Authors: Sanamyan, Karen, Sanamyan, Nadya
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Ascidiacea; Enterogona; Polyclinidae; Aplidium; Aplidium eborinum; Kamchatka
• Online Access: https://doi.org/10.5281/zenodo.3502083; http://treatment.plazi.org/id/03E0C42CEC50FFEEFF4D0843FCDAFE07

Aplidium eborinum n. sp. (Figures 4,5) Aplidium glabrum : Sanamyan, 1998: 119; 2000: 213 (part, specimens from Kamchatka); Sanamyan, Sanamyan, 2010: 242. Material examined. Kamchatka, Avacha Bay: Bezimanny Point, 6–8m, 7.08.2004 (Holotype KBPIG 1442/1); Kekkurny Point, 19m, 26.07.2006 (Paratype KBPIG 1443/2, 2006-07-26-02); Piramidny Point, 18m, 14.02.2007, several large colonies; Starichkov Island, 10–11m, 18.10.2008, one colony (Paratype KBPIG 1444/3). Description. The colonies are thick encrusting masses with the surface raised into large domes or rounded stumpy lobes with large common cloacal apertures on the top. Sometimes the lobes are more separated and connected to each other only by thick anastomoses of the basal test (Figure 5 A). The largest collected colony is about 10 cm in extent and up to 5 cm thick. The colour is rather constant and varies in a limited degree from light yellowgrayish to white, sometimes with a light bluish opalescence on the underwater photographs. In preservative (formaline) all colonies are light grayish or brownish. The test is gelatinous and rather opaque, zooids are not visible well through it. The surface is always clear from foreign particles but sparse sand grains may present internally. Zooids are arranged along rather thick branching cloacal canals converging to sessile common cloacal apertures. In preservative the surface of the lobes is smooth, without depressions or ridges indicating systems. Zooids are rather short and in most preserved specimens strongly contracted, being no more than 7 mm long. They are almost parallel to each other and open at angle to the surface of the colony lobes. Branchial siphon has six lobes. Small atrial aperture has always simple and usually short atrial languet. Numerous closely set thin longitudinal muscles are on each side of the thorax. The branchial sac has 14 rows of stigmata. Cylindrical stomach has 13– 15 wide and usually very regular and prominent folds. Post pyloric part of the gut loop has usual duodenum, midintestine, ...