Identifying Sponges

Key to California Porifera (Page 111)

( From page 110 B) Oxeas < 280 μm; Sigmas of 1 size class.
[A]
Sigmas < 36 μm.
cc111A.jpg
Haliclona (?Gellius) sp. (Hartman, 1975)
Sponge: Encrusting to 12 mm thick, often overgrowing Stelleta clarella.
Color: Alive: Rose-lavender.
Spicules: Megascleres: (1) Oxea: 170 - 190 um. x 7.0 - 9.0 um. Microscleres: (1) Sigmas-C-shaped: 24 -33- 36 um.
Skeleton: Ectosome: some Oxeas at surface of dermal layer; others, stand on end and pierce the surface. Sigmas and spongin abundant in surface layer. Subdermal cavities present. Vertical unispicular and paucispicular tracts descend into the choanosome with horizontal and diagonal cross-spicules. Deeper in the choanosome a greater number of confused spicules occur, but a basic isodictyal pattern remains..
Distribution: Central California.
Depth: Intertidal to subtidal.
Note: Was Sigmadocia sp. De Weerdt, 2002 places Sigmadocia in Haliclona (Gellius). This species needs to be reviewed.
[B]
Sigmas > 36 μm.
Haliclona (?Gellius) sp. (Bakus & Green, 1987)
Sponge: No information given.
Color: Preserved: white.
Spicules: Megascleres: (1)Oxeas-bowed: 110 -217- 280 um. x 2 -7- 9 um. Microscleres: (1)Sigmas: 13 -42- 62 um.
Skeleton: No information given.
Distribution: San Clemente Id., Santa Catalina Id., Southern California.
Depth: 91 - 104 m.
Note: Bakus and Green note that there was insufficient material to determine the species. No illustrations given. Was Sigmadocia. DeWeerdt, 2002 places Sigmadocia in Haliclona (Gellius).
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