Identifying Sponges

Key to California Porifera (Page 029)

( From page 028 B) Toxas to no greater than 350 μm.
[A]
Skeleton of Acanthostyles to Acanthostrongyles in a reticulate pattern.
Acanthostyles in 2 size classes.
cc029A.jpg
Antho (Antho) lithophoenix (de Laubenfels, 1927)
Sponge: Encrusting to 3 cm thick. Consistency: firm.
Color: Alive: Brick red, scarlet, reddish orange.
Spicules: Megascleres: (1) Acanthostyles to Acanthostrongyles: 113 -134 -149- 160 um. x 11.0 - 12.5 um. (2) Acanthostyles to Acanthostrongyles -often with microspined heads: 154 -179-197- 301 um. x 11.5 - 13.0 um. (3) Styles: 147 -197-309 - 447 um. x 12.5 - 14.5) um. (4) Styles to Subtylostyles often with microspined heads: 121 -200-272- 383 um. x 3.5 - 4.5 um. Microscleres: (1) Palmate Isochelae: 13 -19-22- 26 um. (2) Toxas: 19 -83-116- 260 um.
Skeleton: Acanthose spicule reticulation, with longer acanthose spicules and Styles arising at the nodes, often penetrating surface. Thin Styles to Subtylostyles standing erect at or near the surface.
Distribution: Southern and Central California.
Depth: Intertidal to deep water, 39 m.
Note: Was Isociona lithophoenix.
[B] GO TO PAGE 030
Skeleton of Styles - Subtylostyles in ascending tracts. Acanthostyles, 1 size class.
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