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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62 Pr<strong>of</strong>essional Paper <strong>NMFS</strong> 12<br />
46. Clathria (Clathria) laevigata Lambe, 1893<br />
Description. This sponge is massive, laterally compressed,<br />
and irregularly lobate. Consistency is s<strong>of</strong>t and<br />
fragile with round, slightly elevated oscula. Diameter is<br />
<strong>to</strong> 30 cm. Color in life is golden brown. The ec<strong>to</strong>somal<br />
membrane may have a greyish tinge.<br />
Skeletal structure. Structure includes ec<strong>to</strong>somal<br />
smooth small styles (230–290 × 6–10 µm); choanosomal<br />
smooth styles (440–560 × 20–30 µm) occasionally with<br />
acanthose heads; and small acanthostyles (90–240 ×<br />
8–12 µm). Microscleres are palmate isochelae (20–25<br />
µm) and <strong>to</strong>xas (200–530 µm).<br />
Zoogeographic distribution. Locally common in<br />
North Pacific Ocean. In Alaska – central Aleutian Islands.<br />
Elsewhere – known from Kuril Strait (Russia) and<br />
near Vancouver Island (Canada).<br />
Habitat. In Alaska – attached <strong>to</strong> cobbles and pebbles<br />
at a depth <strong>of</strong> 167 m. Elsewhere – reported at depths<br />
between 72 and 138 m.<br />
Pho<strong>to</strong>s. 1) Fragment <strong>of</strong> a specimen collected at a<br />
depth <strong>of</strong> 167 m in <strong>the</strong> central Aleutian Islands. Grid<br />
marks are 1 cm 2 . 2) Same specimen as in pho<strong>to</strong> 1 (indicated<br />
by <strong>the</strong> white arrow) in situ.