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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55. Lissodendoryx (Lissodendoryx) behringi Koltun, 1958<br />
Description. This sponge is globular. Surface is very<br />
uneven, covered with numerous wart-like papillae.<br />
Oscula a<strong>to</strong>p <strong>the</strong> papillae contract upon collection. The<br />
contracted surface <strong>of</strong> <strong>the</strong> specimen on deck (see pho<strong>to</strong>)<br />
suggests that it looks quite different in situ. Consistency<br />
is only slightly elastic, easy <strong>to</strong> tear. Ec<strong>to</strong>some is relatively<br />
thick and easily detachable. Size is <strong>to</strong> 30 cm (diameter)<br />
× 20 cm (height). Color in life ranges from yellow <strong>to</strong><br />
light orange.<br />
Skeletal structure. This species has ec<strong>to</strong>somal <strong>to</strong>rnotes<br />
(380–750 × 10–18 µm) resembling strongyles and<br />
styles, choanosomal acanthostyles (290–680 × 20–40<br />
µm), and arcuate isochelae (42–47 µm).<br />
Zoogeographic distribution. Uncommon. In Alaska<br />
– central Aleutian Islands. Elsewhere – known from <strong>the</strong><br />
Bering Sea (Russia) and <strong>the</strong> Sea <strong>of</strong> Okhotsk.<br />
Habitat. In Alaska – attached <strong>to</strong> cobbles and boulders<br />
at depths between 87 <strong>to</strong> 220 m. Elsewhere – reported at<br />
depths between 32 and 198 m.<br />
Remarks. Koltun (1958) mentions strongylote ec<strong>to</strong>somal<br />
megascleres only in his description <strong>of</strong> this<br />
species, but we note some individual differences<br />
71<br />
between specimens that we have examined. In some<br />
specimens strongylote forms dominate, while o<strong>the</strong>rs<br />
have mainly stylote ec<strong>to</strong>somal <strong>to</strong>rnotes. As all o<strong>the</strong>r<br />
characters and <strong>the</strong> dimensions <strong>of</strong> <strong>the</strong> spicules are within<br />
<strong>the</strong> range for L. behringi, we attribute <strong>the</strong>se differences<br />
<strong>to</strong> intraspecific variations. Gross morphology and spicule<br />
complement are similar <strong>to</strong> Phorbas paucistyliferus, but<br />
<strong>the</strong> spicule architecture is quite different.<br />
Pho<strong>to</strong>. 1) Specimen collected at a depth <strong>of</strong> 124 m in<br />
<strong>the</strong> central Aleutian Islands. Grid marks are 1 cm 2 .