[A]
Mean Discoctaster diameter is between 150 and 199 μm. |
| | Staurocalyptus solidus
Schulze, 1899 |
Sponge:
Barrel-like with broad base; veil of Diactins and Pentactins.
Color: not recorded.
Spicules: Megascleres:
(1) Principal Diactins:
2.0 -4.5- 8.4 mm.
(2) Thick Prostal Diactins:
to 4 cm.
(3) Hypodermal Pentactins (tangential ray):
1.8 -4.5- 6.6 mm.
(proximal ray): 5.5 -6.8- 9.6 mm.
Mesoscleres:
(1) Dermal Stauractins (ray):
75 -117- 180 um.
(2) Dermal Pentactins (tangential ray):
88 -131- 193 um.
(proximal ray): 88 -114- 163 um.
(3) Gastral Hexactins (ray):
89 -116- 134 um.
Microscleres:
(1) Oxy-Hemioxyhexasters (diameter):
113 -141- 179 um.
(2) Discoctasters (diameter):
134 -174- 225 um.
(3) Microdiscohexasters (diameter):
16 -20- 22 um.
Skeleton:
Entirely composed of loose spicules.
Distribution: Southern and Central California.
Depth: Deep water.
Note: Measurements from Holotype USNM 7581.
Tabachnick's 2002 proposed move of Staurocaalyptus to a subgenus of Acanthascus is not followed here.
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[B]
Mean Discoctaster diameter is less than 120 μm.
|
| | Staurocalyptus fasciculatus
Schulze, 1899 |
Sponge:
Thin-walled hollow cone without veil.
Color: not reported.
Spicules: Megascleres:
(1)Principal Diactins:
0.9 -3.2- 7.1 mm.
(2)Thick Diactins:
6.9 - 8.0 mm.
(3)Hypodermal Pentactins (tangential ray):
1.4 -1.9- 2.5 mm.
(proximal ray): 2.7 - 3.3 mm.
Mesoscleres:
(1) Dermal Pentactins (tangential ray):
92 -145- 198 um.
(proximal ray): 75 -117- 157 um.
(2) Gastral Hexactins (ray):
86 -119- 161 um.
Microscleres:
(1)Oxy-Hemioxyhexasters (diameter):
62 -80- 96 um.
(2)Discoctasters (diameter):
71 -84- 97 um.
Skeleton:
Entirely composed of loose spicules.
Distribution: Southern and Northern California.
Depth: Deep water.
Note: Data from Holotype USNM 7580.
Tabachnick's 2002 proposed move of Staurocaalyptusa subgenus of Acanthascus is not followed here.
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