Identifying Sponges

Key to California Porifera (Page 215)

( From page 214 A) Sponge lamellate. Microxeas 86 - 190 μm
[A] GO TO PAGE 216
Sponge lamellate.
Oscula scattered on only one side.
cc215A.jpg
[B]
Sponge lamellate.
Oscula scattered on both sides.
Sphinctrella sp. A (Green & Bakus, 1994)
Sponge: Lamellar. Lateral margin with spicule fringe. Consistency: hard. Surface: rough but superficially smooth. Oscula: depressions with protective spicules.
Color: Preserved: White.
Spicules: Megascleres: (1)Oxeas (thin) : 3250 -4010- 5000 um. x 8 -11- 18 um. (2)Oxeas (thick): 1075 -1645- 2125 um. x 16 -41- 75 um. (3)Oxeas (short): 390 -633- 840 um. x 13 -24- 29 um. (4) Styles: 1400 -1600- 1750 um. x 39 -56- 73 um. (5)Calthrops: 100-273-510 um. x 10-33-65 um. (6)Triacts: 300-350-400 um. x 44-55-65 um. (7)Triaenes: 120-297-700 um. x 21-32-52 um. Microscleres: (1)Microxeas: 135 -171- 190 um. (2)Metasters and Spirasters: 8 -16- 21 um.
Skeleton: Ectosome: Tangential Oxeas and layer of Calthrops. Choanosome: Irregular bundles of Oxeas.
Distribution: Southern California.
Depth: Deep water.
Note: Needs review. May be Poecillastra. or Vulcanella (Vulcanella).
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