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 ...
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60 Pr<strong>of</strong>essional Paper <strong>NMFS</strong> 12<br />
44. Megaciella spirinae (Koltun, 1958)<br />
Description. This irregularly massive-lobate sponge<br />
has an uneven, corrugated surface. Oscula are present<br />
on <strong>to</strong>p <strong>of</strong> cylindrical elevations. Consistency is elastic,<br />
s<strong>of</strong>t, and easily <strong>to</strong>rn. Diameter is <strong>to</strong> 13 cm. Color in life<br />
is golden brown.<br />
Skeletal structure. Ec<strong>to</strong>somal <strong>to</strong>rnotes (160–210 ×<br />
4-6 µm) have acanthose ends. There are choanosomal<br />
acanthostyles (175–212 × 12–16 µm), arcuate isochelae<br />
(28–32 µm), and <strong>to</strong>xa (90–150 µm).<br />
Zoogeographic distribution. Uncommon. In Alaska<br />
– central Aleutian Islands. Elsewhere – eastern Tartar<br />
Strait, near <strong>the</strong> Pacific Coast <strong>of</strong> <strong>the</strong> sou<strong>the</strong>rn Kuril Islands.<br />
Habitat. In Alaska – attached <strong>to</strong> small cobbles and pebbles<br />
in generally low-relief (i.e., flat-bot<strong>to</strong>med) habitat<br />
at depths between 150 and 160 m. Elsewhere – attached<br />
<strong>to</strong> pebbles in sandy habitat at depths between 71 and<br />
414 m and at temperatures between 2.3 and 6.6°C.<br />
Pho<strong>to</strong>. 1) Specimen collected at a depth <strong>of</strong> 155 m in<br />
<strong>the</strong> central Aleutian Islands. Grid marks are 1 cm 2 .