Identifying Sponges

Key to California Porifera (Page 113)

( From page 112 B) Megascleres: Strongyles, Subtylotes, or Tylotes of a single size class with microspined heads, OR Strongyles with microspined heads. All megascleres < 400 μm.
[A]
Megascleres apically asymmetrical Strongyles and Tylotes both with microspined heads.
Microspined Microxeas (Onychaetes) of 2 size classes.
Sponge shape tubular.
cc113A.jpg
Tedania (Tedania) sp. A (Green & Bakus, 1994)
Sponge: Tubular to 9 mm x 1 mm in diameter. Consistency: Fragile. Surface: smooth.
Color: Tan. ?Alive.
Spicules: Megascleres: (1) Strongyles with apically asymmetrical spined ends: 240 -266-300- 345 um. x 8.0 -9.0- 10 um. (2) Tylotes: 160 -196-211- 236 um. x 4.0 - 5.0 um. Microscleres: (1) Onychaetes: 49 -57- 65 um. x 2 -3- 3 um. (2) Onychaetes: 135 -168- 208 um. x 2 -3- 3 um.
Skeleton: Ectosome, thin dermis with Tylotes. Choanosome, with Strongyles in tracts and singly, Onychaetes in bundles.
Distribution: Santa Maria Basin, Southern California.
Depth: 92 - 100 m.
Note: The Strongyles may be mistaken for Styles unless carefully examined. Was Tedanione sp. A.
[B]
Megascleres symmetrical Subtylotes-Strongyles with microspined heads.
Microspined Microxeas (Onychaetes) of 1 size class.
Sponge shape amorphous.
Subtylotes - Strongyles > 150 μm.
Tedania (Tedania) obscurata (de Laubenfels, 1930)
Sponge: Encrusting, amorphous to 12 mm thick. Oscula: 1 mm or less in diameter.
Color: Alive: Bright yellow-tan, greyish-buff.
Spicules: Megascleres: (1)Strongyles to Subtylotes with microspined ends: 182 -206-219- 245 um. x 5.5 - 7.0 um. (2)Strongyles to Subtylotes with microspined ends: 249 - 292-299 - 339 um. x 10 - 13 um. Microscleres: (1)Microspined Microxeas: 78 -83-96- 110 um.
Skeleton: Vague tracts of Strongyles run to the surface with scattered spicules in between.
Distribution: Central, Northern California
Depth: Intertidal to subtidal.
Note: Was Tedanione obscurata. If the Systema definition of Strongylamma were slightly modified to include both smooth Strongyles (which it does now) or those with micro-spined ends, this species would be in that genus.
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