Identifying Sponges

Key to California Porifera (Page 250)

( From page 249 B) Dermalia (=Pinular Hexactins) with distal ray long, spindle-shaped and sharp.
[A]
Main (most abundant) microscleres are stout Oxyhexasters.
cc250A.jpg
Aphrocallistes vastus Schulze, 1886
Sponge: Infundibuliform with flattened mitten-form lateral projections.
Color: Alive: White to golden.
Spicules: Megascleres: (1) Uncinates: 0.89 -1.74- 3.44 mm. (2) Diactins: 262 -465- 722 um. (3) Pinular Hexactins (distal ray): 109 -153- 185 um. (tangential ray): 38 -104- 142 um. (proximal ray): 53 -100- 232 um. Mesoscleres: (1) Hexactins (ray): 85 -128- 201 um. (2) Scopules: 262 -359- 497 um. Microscleres: (1) Oxyhexasters: (diameter) 126 -196- 252 um. (2) Discohexasters 1: (diameter) 30 -40- 56 um. (3) Discohexasters 2: (diameter) 16 -22- 25 um.
Skeleton: Siliceous framework penetrated by diarhysial channels.
Distribution: Throughout California.
Depth: Deep water.
Note: Extra-California distribution: Mexico to Japan. N.E. Pacific form may be regarded as distinct subspecies A. vastus whiteavesianus. Data from RMM 1-2168.
[B] GO TO PAGE 251
Main (most abundant) microscleres NOT stout Oxyhexasters.
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