Identifying Sponges

Key to California Porifera (Page 047)

( From page 002 D) Diacts with microscleres, NO Calthrops.
[A]
Microscleres are Palmate Anisochelae of 2 size classes.
cc047A.jpg
Mycale sp. 1 (of Lee)
Sponge: Very thinly encrusting < 2 mm. On scallop shells. Surface: appears smooth. Oscula: A few openings, 1 mm in width and flush with surface could be oscula.
Color: Not given..
Spicules: Megascleres: (1) Strongyles-thick: 255 -311-358 um. x 6 -9- 12 um. Microscleres: (1) Palmate Anisochelae- all normal palmate shape: 51 -61- 70 um. (2) Palmate Anisochelae: 24 -30- 34 um.
Skeleton: Network of intermeshing spicular tracts. The larger, 60-75 μm; the smaller, 22-36 μm. The tracts branch and anastomose to form an open structure with rectangular or triangular areas between. Tracts reach and barely penetrate surface. Anisochelae dispersed in abundant mesenchyme.
Distribution: Central California, San Jose Creek Beach, Monterey.
Depth: Subtidal.
Note: It is not known if this species only occurs on scallops.
[B] GO TO PAGE 104
Microscleres other than Palmate Anisochelae.
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