In the catalog it is referred as 64277c01, on the Thornax fruit itself number
85582 is visible under enhancement: see photo
At this time, I cannot find any proof for the current number. The 85582 design
number also fits with the correct timeline, since numbers in that range were
being released in sets in 2009 when the Thornax showed up.
For now, I will move the current number to the alternate item number slot and
update the main number.