Identifying Sponges

Key to California Porifera (Page 090)

( From page 089 B) Oxeas > 110 μm.
[A] GO TO PAGE 091
Sponge massive.
Spicules only coring fibers.
Sponge very thinly encrusting.
Spicules coring fibers as well as strewn in confusion.
Haliclona (Rhizoniera) enamela de Laubenfels, 1930
Sponge: Very thin, encrusting 1-2 mm thick. Consistency: spongy. Surface: superficially smooth to verrucose. Pores minute. Oscula: with raised collars, diameter 1 - 1.5 mm, distance apart, 1 cm.
Color: Alive: Drab.
Spicules: Megascleres: (1)Oxeas: 120 - 157 um. x 4.0 - 7.0 um.
Skeleton: Ectosome: Vague or lacking. Choanosome: Fibrous reticulation, rectangular meshes, 75 - 125 μm.. Numerous spicules not in meshes but strewn in confusion. Ascending fibers 15 - 25 μm, cored by 6- 8 rows of spicules; Transverse fibers 5-10 mm, cored by 1- 2 rows of spicules. The skeleton has a distinctive wavy appearance.
Distribution: Southern California.
Depth: Intertidal.
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