1 Dollar - Elizabeth II 4th Portrait, Mauisaurus

Mauisaurus haasti was a plesiosaur recovered from Late Cretaceous marine deposits in the South Island's Marlborough region, and for decades held the record as the longest-known plesiosaur globally — estimates reaching 20 meters, largely owing to an exceptionally elongated neck. The 2010 New Zealand dollar series issued through the Reserve Bank drew on the country's unusually rich Mesozoic marine fossil record, which had been the subject of serious paleontological attention since the 1870s when Julius von Haast first described the type specimen.