[A]
Mean Discoctaster diameter is between 150 and 200 μm. |
| | Rhabdocalyptus asper
Schulze, 1899 |
Sponge:
Known only from fragments; probably saccate with veil.
Color: Not reported..
Spicules: Megascleres:
(1) Principal Diactins:
4.9 -7.5- 11.3 mm.
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(2) Thick Prostal Diactins:
3 - 4 cm.
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(3) Thorned Hypodermal Pentactins (tangential ray):
5.5 -7.5- 11.1 mm.
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(4) Smooth Hypodermal Pentactins (tangential ray):
0.2 -0.49- 0.72 mm.
(proximal ray): 1.8 -3.6- 5.4 mm.
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Mesoscleres:
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(1) Dermal Stauractins (ray):
107 -135- 201 um.
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(2) Dermal Pentactins (tangential ray):
94 -184- 292 um.
(proximal ray): 106 -168- 250 um.
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(3) Gastral Hexactins (ray):
94 -146- 209 um.
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Microscleres:
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(1) Oxyhexactins (diameter):
92 -137- 171 um.
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(2) Oxy-hemihexasters (diameter):
126 -152- 194 um.
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(3) Discoctasters (diameter):
109 -190- 263 um.
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Skeleton:
Composed entirely of loose spicules.
Distribution: Southern California.
Depth: Deep water.
Note: Data mostly from Holotype USNM 7578.
Prostal diactins from Schulze, 1899. Tabachnick's 2002 proposed move of Rhabdocalyptus to a subgenus of Acanthascus is not followed here.
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Mean Discoctaster diameter is less than 110 μm.
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