[A]
Styles: means < 350 μm (262 - 343 μm).
Oxeas: means < 400 μm (268 - 365 μm).
Skeleton with parallel columns 90-120 μm apart;
cross-bracing composed of only 3 - 6 spicules. |
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| | ? Dragmacidon sp.
[of Lee] |
Sponge:
Encrusting thick to 1.5 cm.
Surface: similar to Acarnus erithacus; rugose, granular.
Oscula: numerous, slightly elevated, round to irregular, 1-2 mm wide.
Color: Alive: Exterior: scarlet to orange-red. Interior: yellow to beige.
Spicules: Megascleres:
(1) Styles bent at head end:
176 -262-343- 394 um.
x 5 -10-20- 27 um.
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(2) Oxeas bent at center:
176 -268-365- 412 um.
x 5 -8-22- 27 um.
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Skeleton:
Dermal membrane dark, 30-61 μm thick.
Choanosome plumo-reticulate. Columns 90-120 μm thick and dominated by Styles. Cross-bracing 3-6 spicules, usually Oxeas, wrapped loosely with spongin. Basal skeleton more condensed with basal layer of spicules embedded in spongin.
Distribution: Southern to Central California.
Depth: Subtidal, 7.6 - 21.3 m.
Note: Could be a variant of D. mexicanum but needs study of variation over its range.
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|
[B]
Styles: means > 350 μm (390 - 400 μm).
Oxeas: means > 400 μm (437 - 465 μm).
Skeleton of parallel columns 152 - 212 μm apart;
cross-bracing composed of multiple spicules.
|
| | Dragmacidon mexicanum
(de Laubenfels, 1935) [of Sim & Bakus, 1986] |
Sponge:
Encrusting.
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