Identifying Sponges

Key to California Porifera (Page 064)

( From page 063 A) Microscleres are Palmate Isochelae ONLY. These of 1 or 2 size classes. If 1 size class, >19 μm Megascleres are Styles of only 1 kind. No thick or thin forms.
Palmate Isochelae present and of 2 size classes. Styles > 300 μm.
Amphilectus typichela (Lundbeck, 1905)
Sponge: No information given.
Color: Not given.
Spicules: Megascleres: (1) Styles: 330 -343- 350 um. x 2.4 um. Microscleres: (1) Palmate Isochelae: 19 -20- 22 um. (2) Palmate Isochelae: 60 -62- 65 um.
Skeleton: No information given.
Distribution: Santa Rosa Id. Southern California.
Depth: Deep water, 106 m.
Note: With no information on skeletal structure it is difficult to assess both the generic status and the species designation. No illustrations available. Originally published as ?Esperiopsis cf. typichela.
Palmate Isochelae present, of 1 size class.
Isodictya quatsinoensis (Lambe, 1892)
Sponge: Lobate, flabellate or ramose. Consistency: firm, tough. Surface: rough to the touch. Oscula: 0.7-1 mm, arranged in a uniserial row. In flabellate forms oscula are on the upper portion of the sponge. In ramose forms, they tend to be arranged along one side of the branchlets, each of which has a terminal oscule.
Color: Alive: Orange.
Spicules: Megascleres: (1)Styles: 135 -200 um. x 14 - 24 um. Microscleres: (1)Palmate Isochelae: 20 -27 um.
Skeleton: Bands of fibers with spicules radiate to surface joined by less regular, smaller fibers which present an irregular reticulation.
Distribution: California.
Depth: Subtidal to deep water, 54 to 91 m.
Note: Often found washed up intertidally.
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