Species Overview

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KeyPics/cc264A.jpg

Rhabdocalyptus dawsoni (Lambe, 1893).

Synonyms:

DEFINING CHARACTERS:
Some hypodermal pentactins thorned
Discoctaster <110 Ám.
Microdiscohexasters are common.
SPONGE:
Shape: Straight or curved tube or sac; veil of Diactins and Pentactins.
Color_Preserved_alcohol: Light yellowish grey
HABITAT:
Benthic Region: Marine: Deep water
Distribution: Southern California and Northern California

CHARACTERS

Skeleton:
Composition: Silicate (hexactin)
Architecture: Composed entirely of loose spicules.
Megasclere:
Shape: Principal Diactins
Length: 4.20-6.60-11.40 mm
Megasclere:
Shape: Thick Prostal Diactins
Length: --60.00 mm
Megasclere:
Shape: Short Diactins
Length: 350 -780- 1620 Ám
Megasclere:
Shape: Hypodermal Pentactins thorned
Length-tangential ray: 900 -2600- 4100 Ám
Length-proximal ray: 4.80-6.60-8.80 mm
Mesosclere:
Shape: Dermal Stauractins
Length-ray: 50 -77- 101 Ám
Mesosclere:
Shape: Dermal Pentactins
Length-tangential ray: 54 -77- 99 Ám
Length-proximal ray: 44 -73- 100 Ám
Mesosclere:
Shape: Gastral Hexactins
Length-ray: 55 -105- 177 Ám
Microsclere:
Shape: Oxy-hemihexasters
Diameter: 48 -83- 104 Ám
Microsclere:
Shape: Discoctasters
Diameter: 56 -66- 82 Ám
Microsclere:
Shape: Microdiscohexasters
Diameter: 17 -21- 28 Ám