Species Overview

Rhabdocalyptus dawsoni (Lambe, 1893).

DEFINING CHARACTERS:

Some hypodermal pentactins thorned
Discoctaster <110 µm.
Microdiscohexasters are common.

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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

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: --60000 µ

Megasclere:

Shape: Short Diactins
Length: 350 -780- 1620 µ

Megasclere:

Shape: Hypodermal Pentactins thorned
Length-tangential ray: 900 -2600- 4100 µ
Length-proximal ray: 4.80-6.60-8.80 mm

Mesosclere:

Shape: Dermal Stauractins
Length-ray: 50 -77- 101 µ

Mesosclere:

Shape: Dermal Pentactins
Length-tangential ray: 54 -77- 99 µ
Length-proximal ray: 44 -73- 100 µ

Mesosclere:

Shape: Gastral Hexactins
Length-ray: 55 -105- 177 µ

Microsclere:

Shape: Oxy-hemihexasters
Diameter: 48 -83- 104 µ

Microsclere:

Shape: Discoctasters
Diameter: 56 -66- 82 µ

Microsclere:

Shape: Microdiscohexasters
Diameter: 17 -21- 28 µ