Identifying Sponges

Key to California Porifera (Page 128)

( From page 126 B) Megascleres include Styles but NOT Tylostyles OR Subtylostyles.
[A]
Oxeas thin, width: 7-12 μm.
Thick Styles, width: 41-51 μm.
Thin Styles, width: 7-12 μm.
cc128A.jpg
Higginsia sp. 1 [of Lee]
Sponge: Thickly encrusting 3.3 cm high by 4.0 cm wide. Consistency: somewhat rigid but compressible. Surface: in places superficially smooth but hispid and extremely bumpy. Large lobes extend from base, rugose.
Color: Alive: Not recorded. Preserved: Light brown.
Spicules: Megascleres: (1) Thin Styles: 1879 -2588- 3079 um. x 7 - 12 um.
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(2) Thick Styles: 848 -1074 - 1285 um. x 41 - 51 um.
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(3) Oxeas: 606 -1120- 1660 um. x 7 - 12 um.
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Microscleres:
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(1) Bent Acanthoxeas: 60 -145- 229 um.
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(2) Centrotylote Oxeas: 60 -145- 229 um.
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Skeleton: Ectosome: Cortex of massive numbers of Acanthoxeas, outer ones parallel to surface and tightly scattered within. Large Styles and many small Styles penetrate surface; both heads and tips free. Choanosome: Thick Styles form irregular reticulation to random with a few obvious tracts to surface. Thin Styles, Oxeas and Acanthoxeas scattered in between.
Distribution: Central California. Cordell Bank.
Depth: Deep water.
[B]
Oxeas thick, width: 24 - 36 μm.
Thick Styles, width: 34 - 43 μm.
Thin Styles, width: 15 - 27 μm.
?Higginsia sp. 2 [of Lee]
Sponge: Thickly encrusting 1.5 cm high by 2.0 cm across.
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