A guide to the deep-water sponges of - NMFS Scientific Publications ...
A guide to the deep-water sponges of - NMFS Scientific Publications ... A guide to the deep-water sponges of - NMFS Scientific Publications ...
50 Professional Paper NMFS 12 34. Aaptos kanuux Lehnert, Hocevar, and Stone 2008 Description. Species is irregularly globular. Surface is almost smooth, microscopically slightly uneven. No oscula are visible. Consistency is firm, only slightly elastic. Diameter ranges from 9 to 19 mm. Color in life is mustard yellow. Skeletal structure. SEM images of spicules are shown in Appendix IV. Spicules are strictly radially arranged in the choanosome; spicule density is very high. Special dermal oxeas are densely arranged perpendicular to the surface and form a palisade. There are fusiform strongyloxeas (1795–2132 × 15–22 µm), subtylostyles (500–770 × 8–10 µm), and ectosomal tylostyles (104–215 × 4–8 µm). Zoogeographic distribution. Locally common. In Alaska – known only from the type locality in Pribilof Canyon, Bering Sea. Elsewhere – not reported. Habitat. Attached to pebbles in low-relief (i.e., flatbottomed) silt and sand habitat at depths between 203 and 240 m. Often found in association with several unknown species of hydroids, zoanthids, and the demosponge Stylocordyla borealis eous. Photos. 1) Specimen collected at a depth of 219 m in Pribilof Canyon, Bering Sea. 2) Same specimen as in photo 1 showing close-up detail of the radial arrangement of the choanosome. 3) Same specimen as in photos 1 and 2 in situ. The separation between the red laser marks is 10 cm.
35. Rhizaxinella clavata (Thiele, 1898) Description. Thin stalk terminates in a globular or oval body. Species is similar to Stylocordyla borealis eous. This species has a slightly thicker stalk which widens towards the body and a strongly hispid surface of the body compared to the smooth surface of S. borealis eous. Spicules are arranged radially in the interior of the sponge with dense spicule brushes at the surface. Length is up to 5.5 cm. Color in life is golden brown. Skeletal structure. There are tylostyles to subtylostyles (1050–1780 × 15–32 µm) and smaller tylostyles (180–370 × 6–10 µm). Zoogeographic distribution. Uncommon. In Alaska – Bering Sea (Zhemchug Canyon). Elsewhere – the holotype was recorded from the Sea of Japan. Habitat. In Alaska – attached to hexactinellid sponge skeletons at a depth of 915 m. Elsewhere – reported on mud bottoms at a depth of 183 m. Remarks. Rhizaxinella clavata can be distinguished from the similar Stylocordyla borealis eous by its thicker 51 stalk and hispid oval body. Also, R. clavata has tylostyles and subtylostyles while S. borealis eous has exclusively centrolyte oxeas. Photo. 1) Specimen collected at a depth of 915 m in Zhemchug Canyon, Bering Sea. Specimen is attached to an unidentified hexactinellid sponge skeleton.
- Page 7: CONTENTS (continued) 75. Tedania (T
- Page 10 and 11: 2 Professional Paper NMFS 12 larly
- Page 12 and 13: 4 Professional Paper NMFS 12 Figure
- Page 14 and 15: 6 Professional Paper NMFS 12 struct
- Page 16 and 17: 8 Professional Paper NMFS 12 Bering
- Page 19 and 20: 11 CLASS CALCAREA
- Page 21 and 22: 2. Leucandra poculiformis Hozawa, 1
- Page 23 and 24: 15 CLASS HEXACTINELLIDA
- 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
- Page 43: 21. Caulophacus (Caulophacus) sp. n
- Page 46 and 47: 38 Professional Paper NMFS 12 22. P
- Page 48 and 49: 40 Professional Paper NMFS 12 24. C
- Page 50 and 51: 42 Professional Paper NMFS 12 26. C
- Page 52 and 53: 44 Professional Paper NMFS 12 28. E
- Page 54 and 55: 46 Professional Paper NMFS 12 30. P
- Page 56 and 57: 48 Professional Paper NMFS 12 32. P
- Page 60 and 61: 52 Professional Paper NMFS 12 36. S
- Page 62 and 63: 54 Professional Paper NMFS 12 38. S
- Page 64 and 65: 56 Professional Paper NMFS 12 40. C
- Page 66 and 67: 58 Professional Paper NMFS 12 42. I
- Page 68 and 69: 60 Professional Paper NMFS 12 44. M
- Page 70 and 71: 62 Professional Paper NMFS 12 46. C
- Page 72 and 73: 64 Professional Paper NMFS 12 48. E
- Page 74 and 75: 66 Professional Paper NMFS 12 50. A
- Page 76 and 77: 68 Professional Paper NMFS 12 52. A
- Page 78 and 79: 70 Professional Paper NMFS 12 54. I
- Page 80 and 81: 72 Professional Paper NMFS 12 56. L
- Page 82 and 83: 74 Professional Paper NMFS 12 58. L
- Page 84 and 85: 76 Professional Paper NMFS 12 60. M
- Page 86 and 87: 78 Professional Paper NMFS 12 62. C
- Page 88 and 89: 80 Professional Paper NMFS 12 64. H
- Page 90 and 91: 82 Professional Paper NMFS 12 66. P
- Page 92 and 93: 84 Professional Paper NMFS 12 68. M
- Page 94 and 95: 86 Professional Paper NMFS 12 70. M
- Page 96 and 97: 88 Professional Paper NMFS 12 72. S
- Page 98 and 99: 90 Professional Paper NMFS 12 74. E
- Page 100 and 101: 92 Professional Paper NMFS 12 76. T
- Page 102 and 103: 94 Professional Paper NMFS 12 77. A
- Page 104 and 105: 96 Professional Paper NMFS 12 79. C
- Page 106 and 107: 98 Professional Paper NMFS 12 81. B
35. Rhizaxinella clavata (Thiele, 1898)<br />
Description. Thin stalk terminates in a globular or<br />
oval body. Species is similar <strong>to</strong> Stylocordyla borealis eous.<br />
This species has a slightly thicker stalk which widens <strong>to</strong>wards<br />
<strong>the</strong> body and a strongly hispid surface <strong>of</strong> <strong>the</strong> body<br />
compared <strong>to</strong> <strong>the</strong> smooth surface <strong>of</strong> S. borealis eous. Spicules<br />
are arranged radially in <strong>the</strong> interior <strong>of</strong> <strong>the</strong> sponge<br />
with dense spicule brushes at <strong>the</strong> surface. Length is up<br />
<strong>to</strong> 5.5 cm. Color in life is golden brown.<br />
Skeletal structure. There are tylostyles <strong>to</strong> subtylostyles<br />
(1050–1780 × 15–32 µm) and smaller tylostyles<br />
(180–370 × 6–10 µm).<br />
Zoogeographic distribution. Uncommon. In Alaska<br />
– Bering Sea (Zhemchug Canyon). Elsewhere – <strong>the</strong><br />
holotype was recorded from <strong>the</strong> Sea <strong>of</strong> Japan.<br />
Habitat. In Alaska – attached <strong>to</strong> hexactinellid sponge<br />
skele<strong>to</strong>ns at a depth <strong>of</strong> 915 m. Elsewhere – reported on<br />
mud bot<strong>to</strong>ms at a depth <strong>of</strong> 183 m.<br />
Remarks. Rhizaxinella clavata can be distinguished<br />
from <strong>the</strong> similar Stylocordyla borealis eous by its thicker<br />
51<br />
stalk and hispid oval body. Also, R. clavata has tylostyles<br />
and subtylostyles while S. borealis eous has exclusively<br />
centrolyte oxeas.<br />
Pho<strong>to</strong>. 1) Specimen collected at a depth <strong>of</strong> 915 m in<br />
Zhemchug Canyon, Bering Sea. Specimen is attached <strong>to</strong><br />
an unidentified hexactinellid sponge skele<strong>to</strong>n.
Change language