Identifying Sponges

Key to California Porifera (Page 211)

( From page 210 B) Sponge NOT thin. Greater than 1 cm. Styles > 1500 μm. Triacts do NOT terminate in small bulbs.
[A]
Sponge foliaceous, stalked.
Short ray of triacts with moderate spines.
Triact rays: 60 - 120 μm.
Rhaphides present.
cc211A.jpg
Cyamon catalina Sim & Bakus, 1986
Sponge: Foliaceous, flattened, attached by a 3 cm stalk. Consistency: firm, leathery. Surface: hispid with numerous long projecting Styles. Oscula: not seen.
Color: Alive: Red-orange.
Spicules: Megascleres: (1) Styles (thick): 2660 -3390- 3900 um. x 20 -31- 40 um. (2) Styles (thin-long): 1322 -1890- 3545 um. x 8 -12- 17 um. (3) Styles (thin-short): 130 -575- 730 um. x 5 -7- 10 um. (4) Triact (largest ray): 100 -170- 240 um. x 10 -22- 30 um. (5) Triact (short ray-echinate): 50 -82- 120 um. 10 -22- 30 um. Microscleres: (1) Rhaphides: 60 -73- 80 um.
Skeleton: Spicules densely packed, Triacts dominant and clustered in places. Little information given.
Distribution: Southern California.
Depth: Deep water.
[B]
Sponge massive.
Short ray of triacts microspined or not.
Triact rays: 50 - 240 μm.
Rhaphides ABSENT.
Cyamon neon de Laubenfels, 1930
Sponge: Massive to 2 cm, thick. Consistency: spongy.
Color: Preserved: Dark brown.
Spicules: Megascleres: (1)Styles: 1000 -1236- 1700 (or >) um. x 5 -10- 15 um. (2)Styles: 370 -415- 630 um. x 13 -19- 35 um. (3)Oxeas: 160 -196- 240 um. x 11 -14- 20 um. (4)Oxeas: 170 -268- 370 um. x 4 -5.5- 6 um. (5)Triacts/Tetracts: Rays: 15 x 60 to 20 x 120 um. one ray microspined-ends strongylote or oxeote.
Skeleton: Ectosome: Fleshy, detachable membrane 15 μm thick. Contains numerous cells with dark granules. Choanosome: Densely protoplasmic with some spicules in confusion but with ascending fibers, 40-50 μm thick.
Distribution: Southern California.
Depth: Intertidal to Subtidal.
Note: Sim & Bakus, 1986 report their specimens differ from the Type and illustrations of de Laubenfels with Triaxons of a different shape, size (7.0 -9.5- 11.0 μm) , often smooth. and having thin but short centrotylote Oxeas.
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