Identifying Sponges

Key to California Porifera (Page 037)

( From page 036 B) NO distinctive Tylostyles OR Exotylotes present.
Most with Styles-Subtylostyles but may have Oxeas OR Strongyles.
[A]
Placochelae and Biplacochelae present.
cc037A.jpg
Guitarra abbotti Lee, 1987
Sponge: Encrusting to massive. Surface: smooth to minutely granular with deep grooves which delineate round or oblong lobes, variable. Oscula: 1.0-3.5 mm, in clusters, often with collar.
Color: Alive: Dark chocolate brown - reddish brown. Preserved: Beige, mottled with grey.
Spicules: Megascleres: (1) Styles: 249 -317-341- 396 um. x 7.2 -7.9 um. Microscleres: (1) Placochelae: 27-36-39- 53 um. (2) Placochelae: 64 -81-87- 100 um. (3) Biplacochelae: 23 -32-39- 46 um. (4) Bipocillae: 3 -7-9- 13 um.
Skeleton: Ectosome: Dermal membrane 4 - 6 mm,difficult to see. Penetrated by spicule brushes from ectosomal columns of Styles 20-30 spicules thick. Columns connected by loose bundles of 3-6 megascleres. Choanosome: a regular isotropic reticulation of bundles of megascleres, 2-10 spicules thick.
Distribution: Central California.
Depth: Subtidal to deep water, 26 to 46 m.
[B] GO TO PAGE 038
NO Placochelae or Biplacochelae present.
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