Identifying Sponges

Key to California Porifera (Page 196)

( From page 191 B) Acanthostyles of 2 size classes
[A]
Subtylotes - Tylotes present.
NO Strongyles present.
Diacts to 337 μm.
cc196A.jpg
? Lissodendoryx (Lissodendoryx) kyma de Laubenfels, 1930 [of Green & Bakus, 1994]
Sponge: Encrusting. Surface: undulating.
Color: Alive: Pale drab, brown-orange.
Spicules: Megascleres: (1) Styles: 176 -200-248- 327 um. x 10 -13-14- 16 um. (2) Styles: 362 -409-481- 547 um. x 17 -21-24- 27 um. (3) Subtylotes-Tylotes: 251 -307-327- 370 um. x 5 -7- 9 um. Microscleres: (1) Arcuate Isochelae: 30 -37-39- 47 um.
Skeleton: Ectosome: Dermal membrane with Isochelae, below which are Tornotes more or less tangential to the surface. Choanosome: Dense mesenchyme with ill-defined tracts to surface. These crudely echinated by Styles. The tracts form a loose reticulation.
Distribution: Southern to Northern California.
Depth: Intertidal to deep water.
Note: This form differs from the original description of Lissodendoryx kyma by having mostly Styles. If spined they are usually not as pronounced as those described by de Laubenfels. This is the most common form in California. See Page 142A, 142B and 166A for important information.
[B]
Strongyles present.
NO Subtylotes-Tylotes present.
Diacts to 200 μm.
Hymedesmia (Hymedesmia) sp. B Green & Bakus, 1994
Sponge: Encrusting fragments to < 0.2 mm thick. Consistency: fragile, rough. Surface: with granular appearance and finely hispid.
Color: Tan. ? Alive.
Spicules: Megascleres: (1)Acanthostyles: 70 -79- 88 um. x 8 -9- 9 um. (2)Acanthostyles: 135 -155- 174 um. x 10 -12- 13 um. (3)Strongyles: 137 -174- 195 um. x 3 -4- 5 um. Microscleres: (1)Arcuate Isochelae: 18 -22- 31 um.
Skeleton: Ectosome: With Strongyles, orientation not stated. Choanosome: Vertically-oriented Acanthostyles with heads buried in basal spongin. Abundant microscleres.
Distribution: Southern California,. Santa Barbara Channel.
Depth: Deep water, 120-123 m.
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