Identifying Sponges

Key to California Porifera (Page 035)

( From page 034 B) No distinct Acanthotylostyles present but may have Acanthosubtylostyles.
[A]
Acanthostyles of 1 size class.
Sponge with branching projections from an encrusting base
cc035A.jpg
Endectyon sp. B Green & Bakus, 1994
Sponge: Branching projections from encrusting base, no stalk 0.3 to 0.4 mm thick. Branching projections 1-2 mm tall. Surface: finely hispid, Crusty texture.
Color: White, ?Alive..
Spicules: Megascleres: (1) Styles: 280 -558- 730 um. x 16 -25- 31] um. (2) Acanthostyles: 230 -305- 460 um. x 18 -22- 26 um.
Skeleton: Plumose with axial core of Styles and echinating Acanthostyles.
Distribution: Southern California, Santa Maria Basin.
Depth: Deep water, 90 - 130.5 m.
Note: Specimens in poor condition. Absence of Rhaphides and long Styles may be a result of this.
[B]
Acanthostyles to Acanthosubtylostyles of 2 size classes.
Sponge fan-shaped.
Endectyon (Endectyon) hymani (Dickenson, 1945) [of Green & Bakus, 1994]
Sponge: No stalk, fan-shaped. Consistency: slightly compressible. Surface: lace-like, ridged. Finely hispid. prickly. Oscula: No pores or oscula visible.
Color: Preserved: Drab to almost white.
Spicules: Megascleres: (1)Styles: to 2250 μm x 16 -24- 29 um. (2) Acanthostyles: 250 -317- 420 um. x 18 -26- 36 um. (3) Acanthostyles: 150 -160- 200 um. x 10 -12- 16 um. Microscleres: (1)Rhaphides (stylotes): 650 -755- 940 um. x 4 -5- 5 um.
Skeleton: Plumoreticulate with axial core and echinating spicules.
Distribution: Southern California.
Depth: Deep water, 90 - 150 m.
Note: Was Hemectyon hymani.
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