Identifying Sponges

Key to California Porifera (Page 127)

( From page 126 A) Megascleres include Styles-Tylostyles OR Subtylostyles.
[A]
Tylostyles to 1500 μm.
No Styles.
Oxeas to 920 μm.
NO centrotylote Oxeas.
cc127A.jpg Green & Bakus, 1994
Sponge: Encrusting. Consistency: firm, cartilaginous. Surface: superficially smooth but granular from sand in dermal membrane and acanthoxeas below.
Color: White, ?Alive.
Spicules: Megascleres: (1) Tylostyles: 192 -213- 244 um. x 10 -11- 13 um.
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(2) Tylostyles: 1000 -1300- 1500 um. x 5 -12- 18 um.
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(3) Oxeas: 600 -755- 920 um. x 8 -9- 10 um.
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Microscleres:
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(1) Acanthoxeas: 104 -121- 148 um. x 5 -7- 10 um.
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Skeleton: Ectosome with thick dermal membrane, which includes sand grains but no Acanthoxeas. Choanosome, with densely packed Acanthoxeas. Also contains irregularly spaced tracts of smooth Oxeas and Tylostyles, 3- 6 spicules thick from bottom of sponge to dermal membrane.
Distribution: Santa Maria Basin, Southern California.
Depth: Deep water, 54 - 100 m.
Note: Specimens were thin fragments. Note also that in a recent paper, Van Soest & Hooper, 2005 proposed to rename Desmoxyidae to Heteroxyidae.
[B]
Styles-Tylostyles to > 1500 μm.
Oxeas to > 920 μm.
Centrotylote Oxeas present.

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Higginsia sp. Klontz, 1989
Sponge: Thinly encrusting to 5 mm thick.
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