[A]
Megascleres = Oxeas, Anatriaenes, Orthotriaenes, Plagiotriaenes, and Dichotriaenes. |
| | Stelletta clarella
de Laubenfels, 1930 |
Sponge:
Encrusting to 4 cm thick to massive.
Consistency: spongy to cartilaginous.
Surface: superficially hispid.
Color: Alive: White or grey to dark brown.
Spicules: Megascleres:
(1) Oxeas:
1400 um.
x 15 um.
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(2) Oxeas:
3500 um.
x 50 um.
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(3) Anatriaenes:
Rhabds 1100 - 2000 um.
x 9 - 15 um.
Chords 45 - 90 um.
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(4) Orthotriaenes:
Rhabds 2000 um.
x 20 um.
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(5) Plagiotrianes:
3000 um.
x 100 um.
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(6) Dichotriaenes:
Chords 120 - 180 um.
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Microscleres:
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(1) Oxyasters:
7 - 15 um.
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(2) Irregular Oxyspherasters:
3 - 5 um.
Tufts of spines at the end of each thick ray; look like irregular grains under the light microscope.
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Skeleton:
Ectosome: Cartilaginous cortex packed with clads of Dichotriaenes.
Choanosome: Radiate,with fascicular columns of spicules perpendicular to the surface.
Distribution: Southern to Northern California.
Depth: Intertidal to deep water.
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[B]
Megascleres = Oxeas, Plagiomonaenes-Diaenes or Triaenes.
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| | Stelletta estrella
de Laubenfels, 1930 |
Sponge:
Subspherical to massive to 5 cm thick.
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