Identifying Sponges

Key to California Porifera (Page 033)

( From page 032 A) Acanthostyles with large spines on point. Sponge stalked.
[A]
Styles of 2 size classes; 280 - 2200 and 280 - 680 μm.
Strongyles absent.
cc033A.jpg
Endectyon (Endectyon) hyle (de Laubenfels, 1930) [of Green & Bakus, 1994]
Sponge: Frondose, Stalked. Stalk 1/3 of length. Surface: superficially smooth, finely hispid. Oscula: No pores or oscula visible.
Color: Preserved: Tan. Alive: possibly Brick Red.
Spicules: Megascleres: (1) Style: 1125 -1765- 2200 um. x 18 -25- 34 um. (2) Style: 280 -470- 680 um. x 8 -16- 31 um. (3) Acanthostyles -points acanthose: 340 -433- 480 um. x 23 -27- 36 um. Microscleres: (1) Stylote Rhaphides: 450 -480- 500 um. (2) Oxeote Rhaphides: 450 -480-500 um.
Skeleton: No details given.
Distribution: Southern to Northern California.
Depth: Subtidal to deep water, 14 to 89 m. See 33B.
Note: Description largely as given by Green & Bakus, 1994. Note differences in long Style and Rhaphide measurements from de Laubenfels description below (33B). Raphides could be juvenile megascleres? Was Hemectyon hyale.
[B]
Styles two size classes? 430 - 550 μm and > 800 μm (thin, 10 μm, broken).
Strongyles present.
Endectyon (Endectyon) hyle (de Laubenfels, 1930)
Sponge: Frondose, Stalked. Consistency: Spongy to Cartilaginous. Surface: superficially smooth. Oscula: and pores not evident.
Color: Preserved: Drab.
Spicules: Megascleres: (1)Acanthostyles-pointed end spined; smooth end bent: 180 - 320 um. x 12 - 20 um. (2)Styles: 430 - 550 um. x 15 - 20 um. (3)Styles-long; smooth; easily broken: > 800 um. x 10 um. (4) Strongyles: 350 - 370 um. x 16-19 um. (not shown) Microscleres: (1)Oxeote Rhaphides: 200 - 330 um. x 2.0 um.
Skeleton: Dermal Membrane, 75 μm thick. Thick. Axial region of styles. Peripheral region with dense Acanthostyles pointing outwards.
Distribution: Southern to Northern California.
Depth: Subtidal to deep water, 7.6 m to 130.5 m.
Note: Modified description of de Laubenfels with more recent depth information and illustrations. See page 115A. Was Hemectyon hyale.
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