Identifying Sponges

Key to California Porifera (Page 198)

( From page 197 A) Microscleres do NOT include Forceps; Sigmas of 1 size class.
[A]
Arcuate Isochelae of 2 size classes.
Styles-Acanthostyles of 1 size class.
cc198A.jpg
Lissodendoryx (Lissodendoryx) sp. 1 [of Lee]
Sponge: Encrusting to 2 cm. Surface: granular to superficially smooth. Oscula: with tiny rims, less than 1 mm across.
Color: Alive: Gold, cinnamon brown, yellow, buff.
Spicules: Megascleres: (1) Styles-Acanthostyles: 149 -182-190- 210 um. x 5 -8- 10 um.
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(2) Tylotes -Subtylotes: 135 -168-182- 200 um. x 3 -4- 5 um.
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Microscleres:
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(1) Arcuate Isochelae: 11 -13-17- 21 um.
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(2) Arcuate Isochelae: 19 -27-31- 41 um.
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(3) Sigmas: 19 -27-31- 39 um.
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Skeleton: Ectosome: Dermal membrane under which are thick palisades of Subtylotes, mostly perpendicular to the surface. Choanosome: Thick, dominant reticulation of bundles of 3-5 Styles- Acanthostyles. Tracts only occur very near the palisades of Subtylotes.
Distribution: Central California.
Depth: Deep water.
Note: Easily confused with Lissodendoryx firma. Could be a variant of that species.
[B]
Arcuate Isochelae of 1 size class.
Acanthostyles of 2 size classes.
Hymedesmia (Hymedesmia) sp. Klontz, 1989
Sponge: Thinly encrusting to 1-2 mm thick.
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