Australohalkieria (meaning "southern Halkieria") is an extinct genus of halkieriid from Australia and Antarctica.
The phosphatic coating on sclerites of A. superstes has features that suggest they were originally covered by a thin organic skin.
Possibly some process after death removed many of the palmates and some of the cultrates, but it is more likely that in A. superstes the part of the scleritome, or "coat of mail", closest to the sea-bed was larger relative to the lateral and dorsal zones further up and towards the center.
Possible explanations for the small size of A. superstes sclerites include: the individuals represented in the Georgina assemblage were juveniles; their scleritomes were composed of many more sclerites than those of Early Cambrian halkieriids; or the species itself was relatively small.
[1] The other sclerites from the Georgina Basin are different enough to be excluded from Australohalkieria superstes, but are not sufficiently abundant to provide enough detail for them to be classified.