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

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58 Professional Paper NMFS 12 42. Iophon piceum abipocillus Koltun, 1959 Description. This sponge is massively encrusting. It is very similar to Iophon piceum except the ectosome is white rather than golden-brown and the oscula are distinctly conical. Diameter is to 25 cm. Color in life is white; turns completely brown with darker brown oscula in ethanol. Skeletal structure. It is very similar to Iophon piceum except that bipocillae are absent. Zoogeographic distribution. Uncommon. In Alaska – central Aleutian Islands. Elsewhere – Sea of Okhotsk. Habitat. In Alaska – attached to boulders, cobbles, and pebbles at depths between 82 and 192 m. Elsewhere – reported at a depth of 1240 m. Photos. 1) Specimen collected at a depth of 100 m in the central Aleutian Islands. Grid marks are 1 cm 2 . 2) Same specimen as in photo 1 in situ.
43. Megaciella anisochela Lehnert, Stone and Heimler, 2006 Description. This sponge has clusters of 4–8 tubes with a common stalk. The surface is finely hispid with no recognizable oscula. The consistency is soft and elastic. The dimensions of the short stalk are 2.0 × 0.5 cm and the tubes are approximately 11 × 5 cm. Color in life is light yellow; golden brown after freezing; beige in ethanol. Skeletal structure. SEM images of spicules are shown in Appendix IV. The ectosome is a thin translucent membrane with tangentially arranged tylotes, singly or in small bundles, facing in all directions within the tangential plane. The ectosome contains many isochelae and is supported by underlying styles. The choanosome is a combination of a unispicular reticulation of single spicules and ascending paucispicular tracts connected by single spicules. Ascending tracts of styles penetrate the ectosomal membrane and cause the hispidation. Ectosomal tylotes (245–380 × 4–9 µm) have acanthose heads. Smooth choanosomal styles measure 490–615 × 18–22 µm. Microscleres are palmate isochelae (13–17 µm) with narrow extensions, a small category of palmate isochelae (6–8 µm), and a small category of distorted anisochelae (4–6 µm). Zoogeographic distribution. In Alaska – locally abundant in central Aleutian Islands. Elsewhere – not reported. Habitat. Attached to bedrock, boulders, and cobbles at depths between 702 and 750 m. Photos. 1) Specimen collected at a depth of 702 m in the central Aleutian Islands. Grid marks are 1 cm 2 . 2) Same specimen as in photo 1 in situ. 59
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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
Page 27 and 28: 7. Family Euretidae; Genus nov., sp
Page 29 and 30: 9. Aphrocallistes vastus Schulze, 1
Page 31 and 32: 10. Heterochone calyx calyx Schulze
Page 33 and 34: 11. Regadrella okinoseana Ijima, 18
Page 35 and 36: 13. Acanthascus (Rhabdocalyptus) da
Page 37 and 38: 15. Acanthascus (Staurocalyptus) so
Page 39 and 40: 17. Acanthascus (Staurocalyptus) sp
Page 41 and 42: 19. Aulosaccus schulzei Ijima, 1896
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