Andrew Crombie, in the year 1899, discovered a fragment of fossilized bone that held several large, conical teeth and donated the specimen to the Queensland Museum. In 1924, the director of the museum, Heber Longman, published the scientific description of the specimen and named it the holotype of a new species: Kronosaurus queenslandicus (Longman, 1924). A few years after its publication more substantial Kronosaurus material was found in the same location as the original 1899 find (Meyers, 20055).
In 1932, researchers from Harvard University were in Australia on an expedition and came across the most complete skeleton of Kronosaurus ever discovered. The skull, from that skeleton, happened to match the holotype jaw fragment of K. queenslandicus and the complete skeleton was mounted and put on display at Harvard University in 1959 (Meyers, 2005).
It wasn't until 1977 that Kronosaurus remains were found outside of Australia, when a Colombian farmer turned up an enormous fossil while tilling his field. Paleontologists and nearby people became involved and began excavation that revealed a nearly complete Kronosaurus skeleton. Oliver Hampe formally described the specimen in 1992 and decided that it was a second species within the genus, naming it K. boyacensis (Hampe, 1992; Meyers, 2005).
The local people built a museum on the same spot from where the skeleton was originally excavated and the specimen remains on display in that location (Meyers, 2005).