Identifying Sponges

Key to California Porifera (Page 069)

( From page 068 B) Microscleres do NOT include Anisochelae.
[A]
Tylostyles < 300 μm.
Microscleres: Sigmas and may include Diancistras.
cc069A.jpg (de Laubenfels, 1932)
Sponge: Thinly, encrusting to 1-3 mm thick. Surface: soft, fleshy, smooth.
Color: Alive: Deep blue-violet, gray-lavender; yellow-brown.
Spicules: Megascleres: (1) Tylostyles: 142-171-187-227 um. x 5 -7 um.
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Microscleres:
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(1) Sigmas: 12 -23-25- 65 um.
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(2) Diancistras: 23-30-33-41 um. May be scarce.
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Skeleton: Ectosome fleshy, packed with microscleres. Choanosome with scattered plumose tracts of Tylostyles, points upward and outward. These form terminal brushes at surface.
Distribution: Central, Northern California.
Depth: Intertidal to subtidal.
Note: Was Zygherpe hyaloderma.
[B]
Subtylostyles - Tylostyles > 500 μm.
Microscleres: sigmas only.
Desmacella vagabunda Schmidt, 1870
Sponge: Amorphous.
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