Australian Biological Resources Study

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Genus Halichondria Fleming, 1828

Distribution

States

New South Wales, Northern Territory, Queensland, Victoria, Western Australia


Extra Distribution Information

Cosmopolitan.


IBRA and IMCRA regions (map not available)

IMCRA

Timor Transition (1), Northern Shelf Province (25), Northwest Shelf Transition (26), Northwest Shelf Province (27), Central Western Shelf Province (29), Southwest Shelf Transition (30), Southwest Shelf Province (31), Western Bass Strait Shelf Transition (34), Bass Strait Shelf Province (35), Southeast Shelf Transition (37), Central Eastern Shelf Province (38), Central Eastern Shelf Transition (39), Northeast Shelf Province (40), Northeast Shelf Transition (41)

Distribution References

Diagnosis

Encrusting, massive, occasionally irregularly branching, or digitate sponges with smooth or papillate surface. Oscules often on conical elevations. Surface skeleton well-developed with tangential bundles of spicules and single spicules intercrossing to form a lighter or heavier built surface crust. Subectosomal spaces usually well-developed causing the surface crust to be often rather independent of the main skeleton and easily peeled off. Choanosomal skeleton of rather ill-defined bundles of spicules, which at the surface become oriented perpendicular to the surface crust. They often fan out and carry the surface crust. Many single spicules distributed randomly. Spongin not visibly present. Spicules oxeas with gradually tapering sharp points, in a wide size range, often seemingly divisible into a smaller and a larger category but overlap is extensive. Occasionally style-like modifications occur at a low frequency. About 110 species distributed over all regions and habitats.

 

ID Keys

See Family Halichondriidae Diagnosis.

 

History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
29-Mar-2018 15-Dec-2011 MOVED
29-Mar-2018 13-Apr-2011 MODIFIED
12-Feb-2010 (import)