Identifying Sponges

Key to California Porifera (Page 167)

( From page 165 A) Diacts = obvious Tornotes; size: < 260 μm.
[A]
Tornotes < 152 μm.
Acanthostyles forming a basal reticulation from which arise plumose tracts.
cc167A.jpg
Plocamionida lyoni (Bakus, 1966)
Sponge: Thin encrusting to 2 cm thick.. Surface: can be smooth but most often covered with rounded nodules and deep grooves. Oscula: to 200 μm.
Color: Alive: Olive-tan, yellow, gold, buff, light brown, scarlet, orange.
Spicules: Megascleres: (1) Acanthostyles: 63 - 96-117) - 159 um. x 7.0 - 7.5 um. (2) Acanthostyles: 116 -161- 208- 301 um. x 8.5 - 9.5 um. (3) Tornotes: 92 -117-133- 152 um. x 3.4 - 4.5 um. Microscleres: (1) Arcuate Isochelae: 12 -20-27- 31 um.
Skeleton: Ectosome: Tornotes grouped at surface. Choanosome: Basal reticulation of small Acanthostyles. Large Acanthostyles forming plumose tracts that protrude from surface.
Distribution: Central to Northern California.
Depth: Intertidal to deep water, 51 m.
Note: Some spicule categories appear to reach larger sizes in the Pacific Northwest. Was Hymendectyon lyoni.
[B] GO TO PAGE 168
Tornotes > 157 μm.
Acanthostyles forming tracts to the surface.
START 001 002