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Genus Acanthochaetetes Fischer, 1970

 

Distribution

States

Queensland


Extra Distribution Information

Widely distributed from the Red Sea, W Indian Ocean, to French Polynesia, E Pacific .


IBRA and IMCRA regions (map not available)

IMCRA

Northeast Shelf Province (40), Northeast Shelf Transition (41)

Diagnosis

(Combining information from fossil and Recent material). Sponge has a basal calcite skeleton composed of contiguous vertical, tabulate calicles with lamellar microstructure and covered at the lower surface by an epitheca with concentric growth lines. The inner walls of the calicles are ornamented by vertical rows or clumps of spines. Growth occurs by intramural budding. Living tissue is restricted to a thin surface layer and to the lumen of the outermost tabulae and contains a siliceous spiculation of megascleres in the choanosome and common, relatively large microscleres condensed in the ectosome. Exhalant canals converging upon the slightly elevated oscula create a star-like pattern that is also impressed into the surface of the calcitic calicles and is termed astrorhizae. Spicules consist of tylostylote megascleres, points directed outward, and spiraster-like microscleres.

 

ID Keys

See Family Acanthochaetetidae 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)