Species Overview

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KeyPics/cc203A.jpg

Craniella arb (de Laubenfels, 1930).

Synonyms:
Tetilla arb de Laubenfels, 1930.

SPONGE:
Shape: Subspherical
Consistency: firm; cartilaginous
Color_Alive: Pale tan when young;grey with buff when large
HABITAT:
Benthic Region: Marine: Intertidal; Subtidal; Deep water
Distribution: Southern California to Northern California
Specific Habitat: Intertidally usually on undersides of overhanging rocks.

CHARACTERS

Skeleton:
Composition: Silicate
Architecture: Among the radiating spicule bundles are tracts of Anatriaenes. Young specimens usually without a well-developed basal mat of spicules while large specimens may have such a mat.
Surface:
Texture: superficially hirsute
Oscula:
Diameter: --3 mm
Rims: surrounded by a thick palisade of packed spicules.
Megasclere:
Shape: Oxeas
Length: 2,000.00--3,000.00 mm
Width: 9 - -50 Ám
Megasclere:
Shape: Anatriaenes
Chord: 50 -- 90 Ám
Rhabd: > 10]-- Ám
Megasclere:
Shape: Protriaenes
Chord: 8 -- 30 Ám
Rhabd: to 32]-- Ám
Microsclere:
Shape: Sigmaspires
Length: 7 -- 9 Ám