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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86 Pr<strong>of</strong>essional Paper <strong>NMFS</strong> 12<br />
70. Myxilla (Bur<strong>to</strong>nanchora) pedunculata Lundbeck, 1905<br />
Description. This sponge is globular or lobate, usually<br />
with a stalk. The surface is slightly hispid. Irregularly<br />
scattered circular oscula are flush with <strong>the</strong> surface. Consistency<br />
is s<strong>of</strong>t and elastic. Height and width are <strong>to</strong> 12<br />
cm. Color in life is yellow <strong>to</strong> bright yellow.<br />
Skeletal structure. Spicules are arranged in long ascending<br />
fibers, connected by shorter spicule tracts and<br />
single spicules. There are smooth or slightly acanthose<br />
styles (270–551 × 10–20 µm), ec<strong>to</strong>somal <strong>to</strong>rnotes (220–<br />
380 × 6–10 µm), and microscleres that are anchorate<br />
isochelae (42–75 µm).<br />
Zoogeographic distribution. Widespread but uncommon.<br />
In Alaska – Bering Sea (Pribil<strong>of</strong> Canyon).<br />
Elsewhere – Arctic Ocean (Kara Sea – Vilkitsky Strait,<br />
Laptev Sea) and North Atlantic Ocean (Iceland and<br />
Faroe Islands).<br />
Habitat. In Alaska – attached <strong>to</strong> pebbles and cobbles<br />
at depths between 204 and 236 m. Elsewhere – reported<br />
at depths between 28 and 325 m.<br />
Pho<strong>to</strong>s. 1) Specimen collected at a depth <strong>of</strong> 204 m<br />
in Pribil<strong>of</strong> Canyon, Bering Sea. Grid marks are 1 cm 2 .<br />
2) Same specimen as in pho<strong>to</strong> 1 showing <strong>the</strong> detail <strong>of</strong><br />
<strong>the</strong> oscula. 3) Specimen in situ collected at a depth <strong>of</strong><br />
236 m in Pribil<strong>of</strong> Canyon, Bering Sea. The demosponge<br />
Craniella spinosa is attached <strong>to</strong> <strong>the</strong> specimen. The separation<br />
between <strong>the</strong> red laser marks is 10 cm.