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Calcarifera ordinata
This absolutely spectacular caterpillar is an acacia cupmoth
http://www.brisbaneinsects.com/brisbane_...
http://www.flickr.com/photos/8162680@N08...
The two images differ but the second flikr image looks like yours. It was identified by the expert and is a firm ID. The difference is possibly explained by being a different instar (stage).