Identifying Sponges

Key to California Porifera (Page 163)

( From page 162 B) 1 size class of Acanthostyles.
[A]
Tornotes normal with pointed tips.
cc163A.jpg
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.
May = ? Myxilla fimbriata of Green & Bakus, 1994, whose spicule measurements do not match those reported by Bowerbank, 1864. In addition, Bowerbank describes it as having 2 size classes of Anchorate Isochelae. Bakus and Green report Arcuate to Anchorate Isochelae of one size class but their diagrams look like an Arcuate Isochelae. With no SEM work it is impossible to resolve the problem.
[B]
Tornotes with blunt ends and microspined tips.
?Myxilla sp. 5 [of Lee]
Sponge: Encrusting to 2 cm; amorphous. Surface: superficially smooth, covered with nodules and small tubercles. Oscula: round to irregular, 1-2 mm diameter.
Color: Vinaceous - purple (Ridgeway).
Spicules: Megascleres: (1)Acanthostyles: 89 -123- 162 um. x 12 -17- 24 um. (2) Tornotes;blunt ends microspined in various different ways-Shaft widest in the center: 109 -142- 159 um. x 8 -10- 12 um. Microscleres: (1)Anchorate Isochelae: 15 -19- 22 um.
Skeleton: Ectosome: A thick layer of Tornotes either parallel to the surface or splayed at different angles. Choanosome: Tracts of Acanthostyles with points that rise up and branch towards the surface.
Distribution: Southern California.
Depth: Subtidal.
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