[A]
Mean Discoctaster diameter is greater than 200 μm. |
| | Staurocalyptus dowlingi
(Lambe, 1894) |
Sponge:
Saccate with all lateral and marginal projecting spicules as Diactins.
Color: Dry: Light brownish yellow.
Spicules: Megascleres:
(1) Principal Diactins:
2.2 -4.1- 9.0 mm.
(2) Thick Prostal Diactins:
to 6 cm.
x 300 um.
(3) Hypodermal Pentactins (tangential ray):
0.42 -2.06- 4.35 mm.
(proximal ray): 4.2 -8.1- 11.7 mm.
(4) Small Diactins:
0.59 -0.95- 1.74 mm.
Mesoscleres:
(1) Dermal Pentactins (tangential ray):
64 -105- 166 um.
(proximal ray) 68 -99- 122 um.
(2) Gastral Hexactins (ray):
57 -85- 118 um.
Microscleres:
(1) Oxy-Hemioxyhexasters (diameter):
96 -127- 159 um.
(2) Discoctasters (diameter):
184 -256- 310 um.
(3) Micro-discohexasters (diameter):
16 -22- 27 um.
Skeleton:
Entirely of loose spicules.
Distribution: Southern California.
Depth: Deep water.
Note: Extends north to Aleutian Id., Alaska. Measurements from type specimen NMC 1900-2812. Tabachnick's 2002 proposed move of Staurocalyptus to a subgenus of Acanthascus is not followed here.
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Mean Discoctaster diameter is less than 200 μm.
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