Cardiosyne is an extinct genus of click beetles from the Triassic of Argentina. C. obesa It is the type species of the genus. The type specimen is an elytron with record number PULR-I 324. Its type locality is Picos Gemelos (5th cycle), which is in a Carnian lacustrine - large claystone in the Los Rastros Formation of Argentina. C. elegans The type specimen is an elytron with record number PULR-I 312. Its type locality is Rio Gualo (5th cycle), which is in a Carnian lacustrine - large claystone in the Los Rastros Formation of Argentina.