Identifying Sponges

Key to California Porifera (Page 159)

( From page 158 A) Toxas present; Acanthostrongyles to > 130 μm.
[A] GO TO PAGE 160
NO Subtylostyles present.
Smaller Styles with microspined heads.
cc159A.jpg
Antho (Acarnia) illgi (Bakus, 1966)[See Green & Bakus, 1994 and Bakus & Green,1987].
Sponge: Encrusting to 7 mm thick. Surface: frequently roughened with tubercles and ridges.
Color: Alive: Tan, orange, red.
Spicules: Megascleres: (1) Styles: 140 -200- 240 um. x 2 -3- 4 um. (2) Styles: 222 -376- 680 um. x 6 -9- 11 um. (3) Styles (microspined heads): 190 - 369- 770 um. x 10 -12- 16 um. (4) Acanthostyles: 83 -130-197- 219 um. x 5 -9- 14 um. (5) Acanthostrongyles: 87 -129-147- 160 um. Microscleres: (1) Rhaphides: 61 -76- 100 um. (2) Palmate Isochelae: 16 -21- 35 um. (3) Toxas: 18 -68- 229 um.
Skeleton: Ectosome: Dermal membrane below which are small Styles parallel or at right angles to surface. Choanosome: Reticulation of Acanthostrongyles with echinating Acanthostyles; Styles attached to reticulation at, and penetrating surface.
Distribution: Southern to Northern California.
Depth: Intertidal to deep water.
Note: Specimens from California need review. See page 160 for details of variability.
[B]
Subtylostyles present.
Smaller Styles and Subtylostyles with heads smooth.
Antho (Antho) lithophoenix (de Laubenfels, 1927)
Sponge: Encrusting to 3 cm thick. . Consistency: firm, slightly compressible. Surface: Surface hispid, superficially tuberculate, tubercles 1 - 2 mm high. Oscula: rare, 0.5 mm in diameter.
Color: Alive: Scarlet, red-orange, brick red.
Spicules: Megascleres: (1)Acanthostrongyles - Acanthostyles: 113 -134-144- 160 um. (2) Acantho-strongyles - Acanthostyles: 154 -179-197- 301 um. (3)Styles: 147 -197-309- 447 um. (4)Subtylostyles - Styles: 121 -200-272- 383 um. Microscleres: (1)Palmate Isochelae: 13 -19-22- 26 um. (2)Toxas: 19 -83-116- 260 um.
Skeleton: Ectosome: Thin Styles to Subtylostyles standing erect at or near the surface. Choanosome: A reticulation of Acanthostyles to Acanthostrongyles with the longer Acanthostyles and Styles arising at the nodes, often penetrating the surface.
Distribution: Southern to Central California.
Depth: Intertidal to deep water.
Note: Was Isociona lithophoenix.
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