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. (2) Thick Styles: 848 -1074 - 1285 um. x 41 - 51 um. (3) Oxeas: 606 -1120- 1660 um. x 7 - 12 um. Microscleres: (1) Bent Acanthoxeas: 60 -145- 229 um. (2) Centrotylote Oxeas: 60 -145- 229 um.
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. Consistency: tough, compressible, difficult to tear. Surface: superficially smooth. Sides furrowed with smooth lobes. Top, rugose to verrucose, hispid and rough to the touch. Oscula: sunk into surface, round to slightly oblong, 1.0 mm or less with membranous surrounding ring.
Color: Alive: Not recorded. Preserved: Light brown.
Spicules: Megascleres: (1)Thin Styles: 970 -1201- 3757 um. x 15 - 27 um. (2)Thick Styles: 1659 -1951- 2218 um. x 34 - 43 um. (3)Oxeas: 848 -1199- 1600 um. x 24 - 36 um. Microscleres: (1)Bent Acanthoxeas: 63 -104- 183 um. (2)Centrotylote Oxeas: 63 -104- 183 um.
Skeleton: Ectosome: Only present on some surfaces, appears damaged. Some Acanthoxeas present. 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.
Note: This specimen appears somewhat damaged and may be contaminated. It is similar to sp.1 and may be the same.
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