Identifying Sponges

Key to California Porifera (Page 023)

( From page 022 A) Microscleres Palmate Isochelae ONLY.
[A]
Acanthose spicules arranged vertically with heads embedded in basal spongin.
Encrusting < 1.0 mm thick.
Color: Yellow.
Acanthostyles to 470 μm.
cc023A.jpg
Clathria (Clathria) asodes (de Laubenfels, 1930)
Sponge: Encrusting, thin < 1.0 mm thick. Surface: superficially smooth, slimy. Oscula: punctiform, about 100 μm.
Color: Alive: Rich yellow. Preserved: Drab.
Spicules: Megascleres: (1) Acanthostyles: sparsely spined: 135 - 470 um. x 6.5 -14.5 um. (2) Acanthostyles: 92 - 100 um. x 6.0 - 11.0 um. (3) Style- Subtylostyles with minutely microspined heads: 180 - 260 um. x 3.0 - 5.0 um. Microscleres: (1) Isochelae: 3.0 -14 um.
Skeleton: Ectosome: Vague. Choanosome: With acanthose spicules arranged vertically with heads embedded in basal spongin.
Distribution: Southern and central California.
Depth: Intertidal to subtidal, 34 m.
Note: This species can be confused with Clathria (Microciona) brepha see page 26A. Was Eurypon asodes.
[B]
Acanthose spicules echinating vertical branching spongin fibers.
Encrusting to 4.0 mm thick.
Color: bright to deep scarlet.
Acanthose megascleres to 509 μm, often markedly curved.
Clathria (Microciona) sp. Hartman, 1975
Sponge: Encrusting to 4.0 mm..
Color: Alive: Bright to deep scarlet.
Spicules: Megascleres: (1) Acanthostyles-well spined: 80 - 158- 182 um. x 5.0 - 13.0 um. (2)Acanthostyles-less spination than smaller size class;often markedly curved: 303 - 418 - 509 um. x 15.0-25.0 um. (3)Styles - Tylo- or Subtylostyles: 125 - 270 um. x 3.5 - 7.5 um. heads microspined Microscleres: (1)Palmate Isochelae: 10 - 17 um.
Skeleton: Acanthose megascleres form echinated vertical tracts. Other spicules arranged vertically or at random on surface and associated with tracts.
Distribution: Central California.
Depth: Intertidal to subtidal.
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