Cardiapoda placenta, common name the flat cardiapod, is a species of sea snail, a rare pelagic gastropod mollusc in the family Carinariidae.
This species is found worldwide in warm seas between latitudes 40° North and 40° South at depths of up to 650 m.
The maximum recorded shell length is 35 mm.[1]
Minimum recorded depth is 0 m.[1] Maximum recorded depth is 203 m.[1]