Bomba tricincta Hentschel 1929, comb. nov.

• Main Authors: Kelly, Michelle, Sim-Smith, Carina, Stone, Robert, Reiswig, Toufiek Samaai Henry, Austin, William
• Format: Other/Unknown Material
• Language: unknown
• Published: 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Poecilosclerida; Latrunculiidae; Bomba; Bomba tricincta; Arctic; Barents Sea; Kola Peninsula; Norway; Norway Station; kola peninsula; Northern Norway; Spitzbergen
• Online Access: https://zenodo.org/record/5058031; https://doi.org/10.5281/zenodo.5058031

Bomba tricincta (Hentschel, 1929) comb. nov. (Fig. 12; Tables 6, 9) Latrunculia tricincta Hentschel, 1929: 869, 926, Pl. 12, Fig. 3. Type Material. Holotype — ZMB Por 7851, Northern Norway, Station 8, 71.583 ° N, 26.9 ° E, 198 m, 3 Jul 1898, microscope slide annotated as “ Latrunculia 7851 tricincta, Hentschel MS, Olga Expedition”. Type location. Northern Norway. Distribution. West Spitzbergen to Northern Norway, to Russia’s far northeast Kola Peninsula (Murmanküste), north of the Arctic Circle, and bordered by the Barents Sea. Description. Hentschel (1929: 869) stated that the specimen he examined was a teased preparation from W. Weltner which precluded information on the shape and other details. The specimen was illustrated in Table 12, Fig. 3, stating that it was “at the natural size” (which was not given) and appears to be pedunculate with a collapsed apex and wrinkled stem (Fig. 11 A). No information on the surface is given. Skeleton. Hentschel (1929: 869) states that the skeleton is formed of strong, thick, bifurcating tracts about 80– 150 µm wide. Examination of small pieces of tissue on the microscope slide of the holotype reveal several large, robust tracts tapering from 100 to 350 µm wide, and 75 to 375 µm, splitting in two at the thicker end (Fig. 12 B). Bundles of megascleres are also apparent, ranging in thickness from 50–100 µm. Spicules. Megascleres (Fig. 12 C–E; Table 6), anisostyles with smooth heads, shaft slightly sinuous, 603 (580‒635) × 10 (8‒10) µm. Microscleres (Fig. F–G; Table 6), anisodiscorhabds, composed of three whorls of bifurcating or trifurcating spines. Under light-microscopy the basal, median and apical whorls are sharply spinose, not blunt as in B. endeavourensis gen. et sp. nov., and all are bifurcate. The basal and median whorls appear to be orientated virtually perpendicular to the shaft whereas the apical whorl is oblique to the shaft and pointing forwards. No apex or manubrium is discernible even in the protorhabds. Development of the anisodiscorhabds is symmetrical, with ...