Identifying Sponges

Key to California Porifera (Page 063)

( From page 062 B) Microscleres other than Toxas ONLY.
[A] GO TO PAGE 064
Microscleres are Palmate Isochelae ONLY.
These of 1 size class or 2. If 1 size class, > 19 μm
Megascleres are Styles of only 1 kind.
No thick or thin forms.
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[B]
Microscleres are Palmate Isochelae of 1 size class (< 19 μm) and Toxas. Toxas may be absent.
Megascleres are Styles to Subtylostyles of 2 kinds, thick and thin.
Clathria (Thalysias) originalis (de Laubenfels, 1930)
Sponge: Encrusting to 3 - 16 mm thick. Consistency: stiff, slightly compressible. Oscula: round, 2 mm diameter.
Color: Alive: Orange, red, scarlet to vermilion, salmon-pink, orange-brown, pale yellow ochre.
Spicules: Megascleres: (1)Thin Styles to Subtylostyles: 90 -200 um. x 2 - 5 um. (2)Thick Styles to Subtylostyles: 130 - 165 um. x 9 - 12 um. Microscleres: (1)Palmate Isochelae: 12 - 19 um. (2)Toxas with high arch: 46 - 112 um. may be absent .
Skeleton: Thick Styles to Subtylostyles in ascending echinated tracts joined by cross spicules. Thin Styles to Subtylostyles localized at surface and scattered within.
Distribution: Southern to Northern California.
Depth: Intertidal to deep water, 75 m.
Note: Was Axocielita originalis.
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