Named By: Reuss - 1855.
Classification: Chordata, Reptilia, Sauropterygia, Plesiosauria.
Species: A. cretaceius (type).
Known locations: Czech Republic.
Time period: Cretaceous.
Fossil representation: Uncertain.
As a plesiosaur, Aptychodon would have been a hunter of fish, although it may have been hunted itself by other marine reptiles such as pliosaurs.