Suberites cebriones Morozov 2019

• Main Authors: Morozov, Grigori, Strelkova, Natalya Anisimova, Zimina, Olga, Sabirov, Rushan
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Suberitida; Suberitidae; Suberites; Suberites cebriones; Arctic; laptev; Laptev Sea
• Online Access: https://doi.org/10.5281/zenodo.10012509; http://treatment.plazi.org/id/03D17677FFCE194DB78FFF61F51D2BDD

Suberites cebriones Morozov et al. 2019 (Fig. 3a–h) Material analyzed. Laptev Sea, MMBI trawl survey 2014, st. A-66 (77.2316N, 137.065E), depth 33 m (1 specimen; KFU-LH-2/006); st. A-24 (76.2616N, 139.0433E), depth 15 m (1 specimen; KFU-LH-2/007); st. L-19 (75.1983N, 128.4633E), depth 45 m (1 specimen; KFU-LH-2/008). Description . Sponge has the shape of a shallow cup, up to 3.5 by 4 cm, with walls about 1.5 cm thick and the depression around 1 cm deep (Fig. 3h). Body is attached by a weak, ill-developed stalk to the substrate, usually enveloping a polychaete tube or small pebbles. Surface smooth and even. Texture firm and almost incompressible, easily cut. Oscula in young specimens are inconspicuous. In adult specimens there is a sieve pore area at the bottom of depression. Colour beige. Spicules . Megascleres fall into three distinct categories, viz . choanosomal subtylostyles and ectosomal tylostyles, with some specimens additionally containing stocky strongyles. The latter are never very abundant, usually 10–15 spicules per microscopic slide. Thus, a careful examination is required. Large cylindrical subtylostyles (Fig. 3a–a 1) with only barely visible basal swelling, straight or slightly curved, rather short-pointed: 334–418±46–527 × 6.9–8.6±1.3–10.5 (n = 60) µm. Small tylostyles (Fig. 3b–b 1), slightly fusiform, short-pointed: 173–273±58–458 × 5–7±1.5–9.7 (n = 50) µm. Large, stocky strongyles (Fig. 3c), occasionally tylostrongyles: 79–166±48–300 × 10.6–13±2–18 (n = 30). Microscleres are exclusively microspined, ranging in shape from microstrongyles to microstyles and microxeas (Fig. 3d–f). Dimensions: microstrongyles, 11– 18.3±5.8–36.8 (n = 80) µm; microxeas, 30–41±8.4–57 (n = 140) µm; microstyles, 16–25.2±3.8–35 (n = 30) µm. Skeleton. Choanosomal skeleton is a confused, almost halichondroid reticulation of large subtylostyles, cemented by a dense mass of microrhabds. In the ectosome there are well-defined bouquets of tylostyles, reinforced with a thick (up to ~ 100 µm) layer of microrhabds. Remarks . ...