[A]
Mean Discoctaster diameter is greater than 200 μm. |
| | Rhabdocalyptus nodulosus
Schulze, 1899 |
Sponge:
Tubular, thin-walled, with veil of Diactins and Pentactins.
Color: Not recorded.
Spicules: Megascleres:
(1) Principal Diactins:
8.7 -17.1- 26.2 mm.
(2) Thick Diactins:
16 -23- 30 mm.
(3) Hypodermal Pentactins (tangential ray):
5.0 -5.7- 6.5 mm.
Mesoscleres:
(1) Dermal Stauractins (ray):
84 -119- 179 um.
(2) Dermal Pentactins (tangential ray):
71 -149- 199 um.
(proximal ray): 66 -127- 200 um.
(3) Gastral Hexactins (ray):
101 -136- 195 um.
Microscleres:
(1) Oxyhexactins (diameter):
65 -104- 144 um.
(2) Oxyhemihexasters (diameter):
71 -118- 146 um.
(3) Discoctasters (diameter):
177 -267- 331 um.
Skeleton:
Entirely composed of loose spicules.
Distribution: Southern California.
Depth: Deep water.
Other Data from Holotype USNM 7576.
Tabachnick's 2002 proposed move of Rhabdocalyptus to a subgenus of Acanthascus is not followed here.
|
|
|
Mean Discoctaster diameter is NOT greater than 200 μm.
|
|
|