Identifying Sponges

Key to California Porifera (Page 225)

( From page 224 A) Oxeas < 200 μm.
[A]
Oxeas > 100 μm.
cc225A.jpg
Leucosolenia variabilis (Haeckel, 1870) [of Sim & Bakus, 1986]
Sponge: Erect, branching tube. Surface: minutely hispid.
Color: Tan ? Alive.
Spicules: Megascleres: (1) Triradiate (saggital paired rays): 100 -124- 130 um. x 7 -9- 10 um. (basal rays): 110 -132- 160 um. x 7 -9-10 um. (2) Quadriradiate (saggital paired and basal rays): 100 - 190 um. x 7 - 10 um. (apical ray): 20 - 40 um. (3) Oxeas: 50-109-200 um. x 3 um.
Skeleton: No information given.
Distribution: Southern California.
Depth: Subtidal.
Note: Similar to Leucosolenia eleanor but Oxeas much shorter than those of L. eleanor. Was originally described by Sim & Bakus as L. tenuis Dendy & Row, 1913. Originally described from Europe (Schuffner, 1877) ,then Japan (Dendy & Row, 1913, and Tanita,1942). Sim & Bakus note that it also occurs in British Columbia but that is not substantiated by current records.
[B]
Oxeas < 70 μm.
Clathrina sp. Hartman, 1975
Sponge: A tight network of tubes forming masses up to 4 cm across and 1.5 cm high.
Color: White ?Alive.
Spicules: Megascleres: (1)Triradiates (equiangular): 20 -50-60- 65 um. (2)Triradiates (saggital): No measurements available. (3)Oxeas: No detailed measurements available.
Skeleton: No information available.
Distribution: Central California.
Depth: Intertidal to subtidal.
Note: Originally described with only equiangular Triradiates. See pg. 222A. Needs review and more information. May belong to the genus Guancha.
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