[A]
Acanthostyles mostly fully spined.
Smallest size class tear drop-shaped. |
Lambe, 1893 |
Sponge:
Encrusting to 10 mm.
Consistency: firm, compact.
Surface: uneven and rough.
Oscula: large, 5 mm diameter.
Color: Preserved: Greyish, yellow-brown.
Spicules: Megascleres:
(1) Styles-Acanthostyles (tear- drop shaped)*:
29 - 43 - 65 um.
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(2) Styles-Acanthostyles:
170 - 240 - 314 um.
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(3) Tornotes:
149 - 165 - 209 um.
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Microscleres:
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(1) Anchorate Isochelae:
13 - 17 - 26 um.
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(2) Anchorate Isochelae:
37 - 65 - 71 um.
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(3) Sigmas:
12 - 16-18 - 26 um.
*Sizes based on review of Syntype.
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Skeleton:
Ectosome: Dermal layer of Tornotes parallel to the surface.
Choanosome: Spined Styles- Acanthostyles forming irregular hexagonal meshes with spicules radiating outward towards the angles of the hexagons. Small echinating Acanthostyles in clusters. Tornotes scattered throughout.
Distribution: Canada and West Coast
Note: DeLaubenfels, 1932 describes similar forms from Southern and Central California. They differ by not having tear-drop Acanthostyles. Acanthostyles 179 - 200 μm, Tornotes 170 - 210 μm, Sigmas 22 - 52 μm, Isochelae 14 - 18 μm and 48 - 68 μm.
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[B]
Acanthostyles with few spines.
Smallest size class NOT tear drop-shaped.
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| | Myxilla (Ectomyxilla)
sp. 3 [of Lee] |
Sponge:
Encrusting, irregular to amorphous.
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