[A]
Oxeas of 1 size class, to 450 μm in length.
Oxea width to 30 μm.
Sponge lamellate. |
| | Xestospongia diprosopia
(de Laubenfels, 1930) |
Sponge:
Lamellate, subspherical 1-4 cm thick.
Consistency: hard, friable.
Surface: superficially smooth with low, rounded protuberances, 5-15 mm high on oscular surface. Strongly hispid.
Oscula: on one side only, 3 mm diameter and 15 mm apart over shallow, branching, cloacas. Non-oscular side with numerous ostia at least 10 μm in diameter.
Color: Dried: Pale drab.
Spicules: Megascleres:
(1) Oxeas:
205 -296-352- 450 um.
x 8 -10-23- 30 um.
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Skeleton:
Ectosome a tangential disordered network of spicule brushes.
Choanosome highly dense, reticulate, network of short multispicular tracts interconnected by only a few oxeas or bundles of 4-6 oxeas. Meshes tend to be polygonal. Reticulation finer near surface.
Distribution: Central California.
Depth: Deep water, 500 m.
Note: Was Haliclona diprosopia.
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[B]
Oxeas of 2 size classes, 115 - 200 μm; 240 - 260 μm.
Oxea width, 18 - 20 μm.
Sponge encrusting or erectly lobate.
|
| | Amphimedon trindanea
(Ristau, 1978) |
Sponge:
Encrusting, 4-12 mm or erectly lobate 8 x 3 x 5 cm high.
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