Identifying Sponges

Key to California Porifera (Page 043)

( From page 042 B) Isochelae of 1 size class; Sigmas present OR absent. If present, only one size class.
[A]
Sigmas PRESENT.
Unguiferous Isochelae with long, gently arched shaft.
Unguiferous Isochelae with alae just moderately sharp and slightly flared outwards.
cc043A.jpg
Chondrocladia sp. 3 [of Lee]
Sponge: Stalked with oval apex from which arise a few thick projections.
Color: Preserved: Tan to light brown.
Spicules: Megascleres: (1) Styles-slightly fusiform-small head: 364 -544- 800 um. x 7 -12- 13 um. (2) Styles: 958 -2283- 3466 um. x 12 -17- 20 um. Microscleres: (1) Unguiferous Isochelae: 87 -97- 121 um. (2) Sigmas: 18 -22- 30 um.
Skeleton: Spicule axis branching into plumose tracts.
Distribution: Southern California.
Depth: Deep water, 3640-3740 m.
[B]
Sigmas ABSENT.
Unguiferous Isochelae with short, strongly arched shaft.
Unguiferous Isochelae with alae very sharp, not flared, with the heads aligned facing each other.
Chondrocladia sp. 2 [of Lee]
Sponge: Incomplete- somewhat oval apex of sponge present.
Color: Preserved: Tan to light brown.
Spicules: Megascleres: (1)Styles: 473 -581-598- 655 um. x 9 -19- 36 um. (2)Styles: 800 -929-958- 1030 um. x 42 -52- 55 um. Microscleres: (1)Unguiferous Isochelae: 36 -42-45- 50 um.
Skeleton: Unknown at this time.
Distribution: Southern California.
Depth: Deep water, 4095-4100 m.
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