Identifying Sponges

Key to California Porifera (Page 168)

( From page 167 B) Tornotes > 157 μm; Acanthostyles forming tracts to the surface.
[A]
Acanthostyles 2 size classes, both equally abundant; Largest > 250 μm.
Tornotes: 164 - 291 μm.
cc168A.jpg
Lissodendoryx sp. 6 [of Lee]
Sponge: Thick encrusting to 1.5 cm. Consistency: moderately firm. Surface: smooth, verrucose, with some ridges and folds. Oscula: round, flush or in crevices.
Color: Alive: Dull orange to pale yellow, flesh ochre (Ridgway), pale salmon.
Spicules: Megascleres: (1) Acanthostyles: 115 -161-164 - 182 um. (2) Acanthostyles: 218 -272-297- 309 um. (3) Tornotes: 164 -232-249- 291 um. Microscleres: (1) Arcuate Isochelae: 15 -19-20- 22 um.
Skeleton: Ectosome: Packed with parallel Tornotes and large numbers of Isochelae; The surface penetrated by tips of Acanthostyles. Choanosome: Plumose to confused with numerous multispicular parallel tracts rising to the surface.
Distribution: Southern California.
Depth: Subtidal to 34 m.
[B]
Acanthostyles 1 size class; Largest < 250 μm.
Tornotes: 162 - 205 μm.
Lissodendoryx sp. 4 [of Lee]
Sponge: Irregular encrusting, somewhat foliaceous. Surface: superficially smooth but micro-hispid. Irregularly lumpy with many depressions and furrows.
Color: Not given.
Spicules: Megascleres: (1)Acanthostyles: 149 -172- 211- 248 um. (2)Tornotes: 162 -173-181- 205 um. Microscleres: (1)Arcuate Isochelae: 23 -27-32- 43 um.
Skeleton: Ectosome: Loose palisade of Tornotes at surface. Surface barely penetrated by Acanthostyles. Choanosome: Somewhat confused Isodictyal reticulation of Acanthostyles, 2 - 5 spicules thick. Nodes thick.
Distribution: Southern California.
Depth: Deep water.
Note: May = ? Myxilla fimbriata of Green & Bakus, 1994, whose measurements do not match those of Bowerbank, but are similar to those above. While described as having 2 size classes of Anchorate Isochelae, Bakus and Green report Anchorate Isochelae of one size class but their diagrams look like Arcuate Isochelae.
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