[A]
Acanthostyles 1 size class.
Oxeas with spined tips.
Sigmas absent. |
| | ?Hymenanchora sp. A
Green & Bakus, 1994 |
Sponge:
Encrusting to 1 mm thick.
Consistency: Slightly spongy.
Surface: smooth with volcano-like mounds with oscular openings.
Oscula: 0.2 - 1 mm in diameter.
Color: Tan-grey. ? Alive.
Spicules: Megascleres:
(1) Acanthotylostyles:
350 -418- 590 um.
x 13 um.
(2) Strongyles (many polytylote):
300 -423- 480 um.
x 6 -8- 10 um.
(3) Oxeas (with spined tips):
270 -332- 370 um.
x 4 -7- 8 um.
Microscleres:
(1) Anchorate Isochelae:
49 -58- 65 um.
Skeleton:
Ectosome: Detachable dermis with tightly-packed oxeote diactins and Isochelae.
Choanosome: Acanthostyles with heads near base, and tips pointed to surface, and bundles of Strongyles.
Distribution: Southern California.
Depth: Deep water, 92 - 100 m.
Note: Oxeote diactins never seen in this group before.
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[B]
Acanthostyles 2 size classes.
NO Oxeas present.
Sigmas Present.
|
| | Myxilla (Ectyomyxilla) sp.
[of Lee] |
Sponge:
Encrusting, globular.
Consistency: spongy and crumbly.
Surface: smooth in places to rugose.
Oscula: oval to irregular, 2 - 4 mm diameter.
Color: Alive: Buff.
Spicules: Megascleres:
(1)Acanthostyles:
104 -119- 133 um.
x 4 -4.5- 5 um.
(2)Acanthostyles:
188 -224- 253 um.
x 5 - 9 um.
(3)Subtylotes- Tylotes:
162 -181- 205 um.
x 3 -4- 5 um.
Microscleres:
(1)Anchorate Isochelae:
19 -23- 27 um.
(2)Anchorate Isochelae:
30 -35- 41 um.
(3)Sigmas:
58 -67- 82 um.
Skeleton:
Ectosome: Thick. Large canals just below surface. Specimen covered with epizoics which have penetrated surface making ectosome difficult to describe.
Choanosome: Loose reticulation and thick bundles of spicules with a dense overlay of random spicules.
Distribution: Central California.
Depth: Intertidal.
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