Identifying Sponges

Key to California Porifera (Page 082)

( From page 076 B) Greatest spicule length between 140 and 180 μm.
Oxeas, 150 - 160 μm.
Vertical multispicular tracts.
Color: buff, tan, or dull orange brown.
Neopetrosia vanilla (de Laubenfels, 1930)
Sponge: Encrusting to 15 mm thick. Consistency: stony hard. Surface: superficially smooth.. Oscula: round, often with raised rim, 1.0 - 2.0 mm diameter and 1 cm apart.
Color: Alive: White, pale yellowish drab, buff, tan or dull orange-brown.
Spicules: Megascleres: (1) Oxeas -with a bend at each end.: 150 - 160 um. x 11 - 12 um.
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Skeleton: Ectosomal skeleton indistinct. Choanosome a confused reticulation with vertical multispicular tracts sometimes present, especially near surface. Spicules densely packed.
Distribution: Central California.
Depth: Low intertidal.
Note: Formerly known as Xestospongia vanilla.
Oxeas, 140 - 180 μm.
Irregular polygonal network.
Color: white.
Xestospongia dubia (Ristau, 1978)
Sponge: Encrusting 4-8 mm thick.
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