Species Overview

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KeyPics/cc107A.jpg

Xestospongia zumi (Ristau, 1978 )

Synonyms:
Toxadocia zumi Ristau, 1978.

SPONGE:
Shape: Erectly branching;Branches cylindrical or compressed into lobes. Coral-like
Size_branch width: to 2.0 cm
Color_Alive: White
Color_Preserved: White
Consistency: Firm-rigid
HABITAT:
Benthic Region: Marine: Subtidal
Depth: --18 m
Distribution: Central California; Southern California

CHARACTERS

Skeleton:
Composition: Silicate
Architecture: with multispicular tracts running toward surface. Single spicules united isodictially or in confusion between tracts
Surface:
Texture: hispid
Oscula:
Diameter: 1.0 -- 1.5 mm
Rims: surrounded by vertical spicules
Ectosome:
Architecture: a tangential layer: 60 -80 Ám thick with Oxeas and Toxas. Ectosomal membrane supported by spicule bundles
Choanosome:
Architecture: with multispicular tracts running toward surface. Single spicules united isodictially or in confusion between tracts
Megasclere:
Shape: Oxeas
Length: 115 -(160|180)- 200 Ám
Width: 6 - -14 Ám
Microsclere:
Shape: Toxas-variable in shape
Length: 50 - -90 Ám