The length of the upper toothrow of one specimen from this locality is 8.50 mm (0.3346 in) and the length of the upper first molar is 3.48 mm (0.1370 in), slightly smaller than in living "Lundomys", which ranges from 3.56 to 3.64 mm (0.1402 to 0.1433 in) in four specimens==Natural history=="Lundomys molitor" is semiaquatic in habits, spending much of its time in the water, and is active during the night.