Species Overview

154
KeyPics/cc020A.jpg

Polymastia pacifica Lambe, 1894 [of Green & Bakus, 1994].

Synonyms:

SPONGE:
Shape: Cushion-shaped
Size_Thickness: --6 mm
Consistency: Firm
Color_Alive?: Ectosome: dirty white; Choanosome: tan to white
HABITAT:
BenthicRegion: Marine: Deep water
Depth: 54 --78 m
Distribution: Southern California; western Santa Barbara Channel;Santa Maria Basin

CHARACTERS

Skeleton:
Composition: Silicate
Architecture: Fleshy - Radiate; radial tracts of spicules
Surface:
Texture: Smooth to hispid; rough to prickly
Ectosome:
Architecture: Cortex 1.5 mm thick. Styles to Sub-tylostyles in radial tracts and protrude from surface]
Color: Dirty white
Spicules: Tylostyles in cortex
Choanosome:
Architecture: Fleshy; with radial tracts of spicules
Color: Tan to white
Spicules: tylostyles in cortex
Megasclere:
Shape: Style
Length: 975 -1087- 1300 Ám
Megasclere:
Shape: Style
Length: 590 -703- 770 Ám
Megasclere:
Shape: Subtylostyle -Tylostyle (thick)
Length: 250 -434- 650 Ám
Megasclere:
Shape: Subtylostyle-Tylostyle (thin)
Length: 88 -143- 244 Ám