Identifying Sponges

Key to California Porifera (Page 065)

( From page 059 B) Microscleres include Sigmas.
[A]
Rhaphides present, in bundles.
cc065A.jpg
Biemna rhadia de Laubenfels, 1930
Sponge: Amorphous to 7 mm high. Consistency: Fragile. Oscula: Not seen..
Color: Dry: Drab.
Spicules: Megascleres: (1) Styles: 600 -932- 1305 um. x 20 um. Microscleres: (1) Sigmas: 13 -15- 25 um. (2) Sigmas: 29 -50- 91 um. (3) Sigmas: 260 -280- 330 um. (4) Rhaphides: 90 -168- 210 um.
Skeleton: Detachable dermal membrane with microscleres only. Choanosome with thick ascending, branched tracts, cored by densely packed styles.
Distribution: Southern to Northern California.
Depth: Intertidal to deep water, 700 m.
Note: Small spheres were reported by de Laubenfels but have not been reported since.
[B] GO TO PAGE 066
Rhaphides NOT present.
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