A guide to the deep-water sponges of - NMFS Scientific Publications ...

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60 Professional Paper NMFS 12 44. Megaciella spirinae (Koltun, 1958) Description. This irregularly massive-lobate sponge has an uneven, corrugated surface. Oscula are present on top of cylindrical elevations. Consistency is elastic, soft, and easily torn. Diameter is to 13 cm. Color in life is golden brown. Skeletal structure. Ectosomal tornotes (160–210 × 4-6 µm) have acanthose ends. There are choanosomal acanthostyles (175–212 × 12–16 µm), arcuate isochelae (28–32 µm), and toxa (90–150 µm). Zoogeographic distribution. Uncommon. In Alaska – central Aleutian Islands. Elsewhere – eastern Tartar Strait, near the Pacific Coast of the southern Kuril Islands. Habitat. In Alaska – attached to small cobbles and pebbles in generally low-relief (i.e., flat-bottomed) habitat at depths between 150 and 160 m. Elsewhere – attached to pebbles in sandy habitat at depths between 71 and 414 m and at temperatures between 2.3 and 6.6°C. Photo. 1) Specimen collected at a depth of 155 m in the central Aleutian Islands. Grid marks are 1 cm 2 .
45. Clathria (Clathria) barleei (Bowerbank, 1866) Description. This sponge is elongated and massive. It is irregularly ramified with a corrugated surface; oscula are flush with the surface. Diameter is to 15 cm. Color in life is orange-brown. Skeletal structure. Dermal styles (270–360 × 3–6 µm) have acanthose heads. There are choanosomal smooth styles (420–540 × 18–35 µm), isochelae (16–20 µm), and toxa (130–720 µm). Zoogeographic distribution. Uncommon. In Alaska – central Aleutian Islands. Elsewhere – Arctic Ocean (Barents Sea near Murmansk, Russia) and Northeast Atlantic Ocean (from Ireland to France and Norway). Habitat. In Alaska – attached to small cobbles and pebbles in generally low-relief (i.e., flat-bottomed) habitat at depths between 150 and 160 m. Elsewhere – reported at depths between 72 and 440 m and temperatures between 1 and 4.2° C. Remarks. Specimens from the Northeast Atlantic are described as flabellate with a characteristic honeycombed surface of a different color (Van Soest and Stone, 1986). The spicule complement (types and size 61 ranges) of this specimen conforms perfectly to Clathria barleei so we assume it to be another growth form of the same species in the Pacific Ocean. Van Soest and Stone (1986) report this species from the Arctic to the west coasts of Ireland and France so a circumpolar distribution seems possible. Photo. 1) Specimen collected at a depth of 155 m in the central Aleutian Islands. Grid marks are 1 cm 2 .
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CONTENTS Introduction . . . . . . .
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CONTENTS (continued) 75. Tedania (T
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2 Professional Paper NMFS 12 larly
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Page 21 and 22: 2. Leucandra poculiformis Hozawa, 1
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Page 25 and 26: 5. Farrea occa occa Bowerbank, 1862
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Page 29 and 30: 9. Aphrocallistes vastus Schulze, 1
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