[A]
Oxeas: 380 - 530 μm, most 440 - 480 μm.
Skeleton of vertical multispicular tracts with confused echinating cross-connections. |
| | Hymeniacidon tuscarus
Ristau, 1978) |
Sponge:
Thick encrusting to about 1.5 cm thick or more.
Consistency: slightly spongy, compressible.
Surface: very hispid.
Oscula: very irregular, 0.4-1.0 mm in diameter and dispersed irregularly over surface.
Color: Alive: Light to medium dark brown exterior, dark chocolate brown interior.
Spicules: Megascleres:
(1) Oxeas -slightly curved or irregularly bent:
380 - 530 um.
x 10 - 22 um.
most 440 - 480 x 18 μm.
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Skeleton:
Ectosomal membrane, 10 μm thick with brushes and spicules projecting in various directions throughout membrane.
Choanosome of vertical multispicular tracts with confused, echinating cross-connecting spicules. Tracts often masked by confusing echinating arrangement. Note: When alive, interior is gelatinous and skeletal structure difficult to discern..
Distribution: Central California, Carmel to Bodega Bay.
Depth: Intertidal (on wrack) to 7 m.
Note: Was Axinomimus tuscaris.
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Oxeas to 300 - 400 μm, never as large as 440 - 480 μm.
Skeleton halichondriid - OR -Mixture of halichondriid structure and loose tracts OR -Heavy reticulation of multispicular tracts; very dense, often with rock-like consistency.
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