Identifying Sponges

Key to California Porifera (Page 222)

( From page 221 B) Triradiates < 70 μm.
[A]
Triradiates 20 - 65 μm.
Color: white.
cc222A.jpg
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) Triradiate: 20 -50-60- 65 um. (2) Triradiates-saggital: No measurements available. (3) Oxeas: No measurements available.
Skeleton: No information available.
Distribution: Central California.
Depth: Intertidal to subtidal.
Note: Originally described with only equiangular Triradiates. See page 225B.
[B]
Triradiates: 60 - 70 μm.
Color: white to tan.
Clathrina clathrus (Schmidt, 1864) [of Sim & Bakus, 1986]
Sponge: Encrusting. An irregular mass formed of a reticulation of anastomosing tubes. Surface: smooth.
Color: White to tan. ?Alive.
Spicules: Megascleres: (1)Triradiates: 60 - 70 um. x 6 um.
Skeleton: No information given.
Distribution: Southern California.
Depth: No information given.
Note: Little information given other than spicule size. See R. Borojevic, Nicole-BouryEsnault, M. Manuel and J. Vacelet, Order Clathrinida, Clathrina, pg. 1142, Systema Porifera, for discussion of the difficulties of identifying this group of sponges. Reported from Adriatic, Britain,Spain and New Zealand.
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