[A]
Megascleres include Mesotriaenes. |
| | Geodia mesotriaena
Lendenfeld, 1910 |
Sponge:
Subglobular to massive to 6 cm or greater. Pore sieves present.
Surface: covered by dense spicular plush.
Color: Preserved: White, internally yellow.
Spicules: Megascleres:
(1) Oxeas (rarely Styles or Strongyles):
to 9000 um.
x 20 - 112 um.
(2) Plagiotriaenes or Plagiodiaenes:
9000 um.
x 20 - 112 um.
(3) Anatriaenes:
5000 - 10000 um.
Rhabds: diameter 2 - 45 um.
(may vary in size). (4) Mesoprotriaenes:
Rhabds: 11- 48 um.
(may be Protrianene or Orthotriaene; or may be a Triaene or Diaene or Monotriaene). (5) Dermal Oxeas or Styles:
200 um.
x 2 - 13 um.
Microscleres:
(1) Sterrasters:
Greatest diameters 65 - 118 um.
least 42 - 83 um.
(2) Strongylospherasters:
diameter 4 - 15 um.
(3) Oxyspherasters:
diameter 6 - 24 um.
(4) Oxyeuasters:
diameter 9 - 35 um.
(great variability; strongylote to oxeote; spined or not).
Skeleton:
Ectosome: Cortex of Sterraster armor. Plagiotriaenes or -diaenes with clads in or just below cortex.
Choanosome: Radiate.
Distribution: Southern to Northern California.
Depth: Subtidal to deep water.
Note: See Page 207A.
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Megascleres do NOT include Mesotriaenes.
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