Identifying Sponges

Key to California Porifera (Page 170)

( From page 169 A) Sigmas present.
[A]
Both Arcuate and Anchorate
Isochelae present.
cc170A.jpg
Hymedesmia (?Hymedesmia) sp. E Green & Bakus, 1994
Sponge: Thin encrusting. Consistency: fragile. Surface: prickly, hispid.
Color: Alive: Tan to light orange.
Spicules: Megascleres: (1) Acanthostyles: 65 -91- 202 um. x 5.0 -6.0- 8.0 um. (2) Acanthostyles: 230 -423- 500 um. x 10 -12- 13 um. (3) Tornotes: 161 -177- 200 um. x 3.0 -3.0- 4.0 um. Microscleres: (1) Arcuate Isochelae: 10 -17- 21 um. (2) Anchorate Isochelae: 21-23- 26 um. (3) Sigmas: 10 -11- 13 um. (4) Sigmas: 29 -39- 49 um.
Skeleton: Ectosome: Tornotes. Choanosome: Vertically-oriented Acanthostyles, heads buried in spongin. Microscleres abundant.
Distribution: Southern California, Santa Maria Basin.
Depth: Deep water. 75-90 m.
[B]
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