[A]
Sigmas either normal OR with a thickening at the center of the shaft.
Anisochelae of 1 size class. |
Bakus, 1966 |
Sponge:
Encrusting often wrapped around algae, hydroids etc to 1 cm thick.
Consistency: compressible.
Surface: hispid but feels smooth.
Oscula: 1-2 mm diameter, the larger often elevated.
Color: Alive: yellow-rose to gold-beige.
Spicules: Megascleres:
(1) Styles:
125 -173-186- 212 um.
x 5 -7-8- 10 um.
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Microscleres:
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(1) Sigmas (often rare):
15 -19-20- 38 um.
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(2) Anisochelae:
15 -30-31- 38 um.
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Skeleton:
Dermal membrane above subdermal spaces.
Ladder-like tracts to surface. Near their bases they tend to merge into a reticulation.
Distribution: Central, northern California.
Depth: Intertidal to deep water, 40 m.
Note: California specimens lack Sigmas with central thickening (some Pacific Northwest specimens do have these) and all spicule measurements are somewhat smaller than those of the type. This species and M. hispida (pg. 57A) are very similar and need to be thoroughly compared.
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[B]
Sigmas normal only. No central thickening.
Anisochelae of 2 size classes.
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[of Lee] |
Sponge:
Thin encrusting to 2-3 mm thick.
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