Thenea levis

• Main Authors: Cárdenas, Paco, Rapp, Hans Tore
• Format: Other/Unknown Material
• Language: unknown
• Published: 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Astrophorida; Theneidae; Thenea; Thenea levis; Norway; Tromsø; Rockall Bank; Røst; Northern Norway; University of Tromsø
• Online Access: https://zenodo.org/record/6166255; https://doi.org/10.5281/zenodo.6166255

Thenea levis von Lendenfeld, 1907 (Figures 18 C–D, 19, 20) Synonymy. Thenea levis von Lendenfeld, 1907: von Lendenfeld 1907, p. 215; Steenstrup & Tendal 1982, p. 259; Klitgaard 1995, p. 1; Cárdenas et al. 2011, Table S 1. Material. ZMBN 85230, 85249, West of Marstein, western Norway, 60 ° 8 ' 18 ''N, 4 ° 50 ' 47 ''E, 300 m, Agassiz trawl; NTNU-VM 55838, 55839, 55842, Haltenbanken, western Norway, 64 ° 14 ' 56 ''N, 9 °0' 3.7 ''E; ZMBN 85250, Røst reef, northern Norway, 67 ° 30.41 'N, 9 ° 25.60 'E, 312 m, large boxcore; ZMBN 85229, Sotbakken, northern Norway, 70 ° 45.32 'N, 18 ° 40.11 'E, 286 m, large boxcore; University of Tromsø, Marbank, field# M07GOS0081- 7, off Tromsø, 71 °08'N, 18 ° 39.33 'E, 190 m, beamtrawl. Comparative material. Thenea levis, ZMAPOR 21501, SW of Rockall Bank, 55 ° 31 ' 7.9 "N, 15 ° 48 ' 27.54 "W, 844- 857 m. Description. Outer morphology. Massive elongated sponge. ZMBN 85230 is straight (8 cm long, 2 cm high) (Fig. 19 A) while ZMBN 85249 (6.5 cm long, 2.5 cm high) is slightly bent. Both have a minutely hispid surface. ZMBN 85251 (3 cm long, 2 cm high) is very hispid with very long hair-like oxeas. Specimens are not compressible. Color alive and in ethanol is brown. Choanosome is whitish to brownish (alive and in ethanol). Pore and oscule areas (both with sieves) are along the longitudinal sides, opposite to each other. They are more or less long and high. A thick overhang protects the pore area (Fig. 19 B). Small roots extend from the base of the sponge. Skeleton (Fig. 19 C–D). Like T. abyssorum except for the presence of many protriaenes (below the ectosome) and abundance of plesiasters, especially near the poral area (Fig. 19 C). Spicules (ZMBN 85230) (Figs. 18 C–D, 19 D–F). (a) oxeas, stout, straight or slightly bent, length: 3375- 5311.5 - 7750 µm (N= 13); width: 35- 70 - 95 µm (N= 17). (b) dichotriaenes (Fig. 19 D), straight rhabdome, length: 4500- 5187 - 6500 µm (N= 4); width: 33- 58.6 - 85 µm; protoclad length: 130- 196.3 - 260 µm; deuteroclad length: 230- 574.8 - 950 µm. (c) ...