Identifying Sponges

Key to California Porifera (Page 155)

( From page 154 A) NO Styles present. Acanthostyles present.
[A]
Acanthostyles 3 size classes.
Toxa present.
cc155A.jpg
Megaciella sp. 1 [of Lee]
Sponge: Thickly encrusting. Consistency: firm, slightly compressible. Surface: granular to verrucose. In larger specimens ridges separated by deep, narrow, fissures. Oscula: 1 - 4 mm, flush with surface or sunk into furrows, or on broad, volcano-like elevations, these often furrowed.
Color: Not given.
Spicules: Megascleres: (1) Acanthostyles: 79 -101-102- 145 um. x 5 -9- 13 um. (2) Acanthostyles: 145 -234-266- 339 um. x 12 -15- 17 um. (3) Acanthostyles: 321 -339-374 - 412 um. x 19 -22- 24 um. (4) Strongyles - Subtylotes with microspined tips: 164 -216-218-280 um. x 4 -5-7 um. Microscleres: (1) Palmate Isochelae: 16 -20-21- 25 um. (2) Toxa with high arch: 7 -85-119- 193 um. (3) Toxa with low arch: 8 -9- 13 um.
Skeleton: Ectosome: Masses of Strongyles more or less parallel with surface, these penetrated by the tips of tracts. Choanosome: Confused but with thick, multispicular tracts of large Acanthostyles, braced by single to few Acanthostyles. Tracts echinated by smaller Acanthostyles.
Distribution: Central California.
Depth: Deep water.
[B]
Acanthostyles usually 2 size classes; may be 1.
Toxa ABSENT.
Iophon rayae (Bakus, 1966)
Sponge: Thin, encrusting, amorphous. Consistency: soft, easily compressible. Surface: smooth and mucoid. Oscula: abundant, 67-500 μm in diameter.
Color: Alive: Cinnamon, cinnamon-brown, orange.
Spicules: Megascleres: (1)Acanthostyles: 84 -124-165- 192 um. x 6 -10-11- 14 um. (2)Acanthostyles: 149 -174-209- 265 um. x 6 - 10-11- 14 um. (3) Subtylotes-Strongyles-Tylostrongyles: 109 -141-158- 186 um. x 3 -4 - 5 um. (4) Subtylostyles (may be absent): 174 -189 - 206 um. Microscleres: (1)Palmate Anisochelae: 5 -15-18- 24 um.
Skeleton: Ectosome: Dermal membrane with bundles of diacts in horizontal clusters plus Anisochelae. Choanosome: Acanthostyles with heads embedded in basal spongin. Echinating tracts arise from here to surface. Surrounding tissue with loose megascleres and Anisochelae.
Distribution: Central to Northern California.
Depth: Intertidal to deep water, 79 m.
Note: NW Pacific specimens tend to have higher means and upper ranges for all spicules. Was Hymedesanisochela rayae.
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