[A]
Sigmas of 1 size class, 27 -40- 52 μm . Monacts are heavily spined Acanthostyles. |
| Myxilla (Myxilla)
sp. 1[of Lee] |
Sponge:
Flat, encrusting.
Surface: granular, hispid and grooved.
Oscula: few, 0.3 - 1.0 mm in diameter.
Color: Unknown.
Spicules: Megascleres:
(1) Acanthostyles:
128 -184-194- 227 um.
x 7 -11- 15 um.
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(2) Tornotes:
142 -167-175- 205 um.
x 7 um.
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Microscleres:
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(1) Anchorate/Unguiferous* Isochelae:
15 -20-21- 28 um.
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(2) Anchorate/Unguiferous* Isochelae:
35 -44-45- 50 um.
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(3) Sigmas:
27 -40- 52 um.
*Anchorate and Unguiferous Isochelae both occur in 2 size classes and share similar ranges and means. Unguiferous Isochelae are rare while Anchorate Isochelae are abundant.
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Skeleton:
Ectosome: Dermal membrane thick with packed Acanthostyles and Tornotes penetrated by spicules from below.
Choanosome: Isodictyal reticulation of 2-5 megascleres, mostly 3-sided reticulation.
Distribution: Central and Northern California.
Depth: Intertidal.
Note: May = M. beringensis of Pacific Northwest.
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[B]
Sigmas of 2 size classes, 6 -20-21- 27 μm and 25 -34-43- 49 μm. Monacts Styles and Acanthostyles.
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| Myxilla (Myxilla)
sp. 4 [of Lee] |
Sponge:
Globular to elongate, amorphous 2 cm thick.
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