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Asters present. |
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[B]
NO Asters present.
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| | Plakina bioxea
Green & Bakus, 1994 |
Sponge:
Lamellar with smooth scalloped edges.
Consistency: firm but compressible.
Surface: smooth with scattered raised conules, 0.5 - 0.8 mm high.
Color: Preserved: White to light tan.
Spicules: Megascleres:
(1)Oxeas:
68 - 96-166- 179 µm.
x 2 -4-6- 8 µm.
(2)Oxeas:
160 -504-679- 1160 µm.
x 6 -8-10- 13 µm.
(3)Oxeas:
800 -1125- 1280 µm.
Microscleres:
(1)Calthrops-highly modified (ray):
7 -15-29- 38 µm.
(2)Calthrops (ray):
110 -208- 290 µm.
(3)Microxeas:
No measurements given .
Skeleton:
Ectosome: Thin dermal membrane, granular in appearance; otherwise unorganized, densly packed with Calthrops.
Choanosome: Basal layer of spicule tracts, these 0.150 - 0.200 mm in diameter (about 50 spicules thick), otherwise unorganized with crowded Calthrops and some Microxeas.
Distribution: Southern to ? Central California.
Depth: Deep water.
Note: See also Bakus & Green, 1987 under Pachastrella dilifera. More information may be needed to assure generic assignment. With oxeas, more like Pachastrella.
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