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The species is solely known from the distal end of a right humerus found in the Middle Miocene (about 12 Ma), Bullock Creek deposits in Australia.
It is only known as a fossil from the Late Middle Miocene of Austria (the Sarmatian Craton of the Paratethys) in the age range between 13.65 Ma and 11.608 Ma.
Three enigmatic genera of waterfowl, Mionetta from the Late Oligocene to Middle Miocene of central Europe and Dunstanetta and Manuherikia from the Bathans Early/Middle Miocene of Otago, New Zealand, show some similarities to oxyurine ducks and judging from biogeography, the latter two may plausibly be related.
Dryopithecus fontani is an extinct ape that was first discovered in Saint-Gaudens, Haute-Garonne, France, in the 19th century, and was dated to the middle Miocene.
The researchers identified the species from a partial skeleton found in 1990 in Caroline County, Virginia, the site of a prehistoric ocean, in middle Miocene Calvert Formation rocks.
The fossil remains of Titanocetus was discovered within some marine deposits dating back to the Serravallian (middle Miocene) and belonging to the "Fumaiolo Formation" (Republic of San Marino).
aequatorialis (Johnson & Madden, 1997): Based on a piece of right lower jaw, found in the river Burgaya in the province of Cañar, Ecuador, in the Biblián Formation (Middle Miocene, 19 million years ago).