| Echinocardium cordatum, Lovenia|
Loveniidae is a family of heart urchins in the order Spatangoida.
These sea urchins are called "heart urchins" due to their specific shape, looking like a heart when seen from below (more or less depending on the genus). The mouth is located between the two cheecks, and the anus below the tip.
According to WoRMS :genus Araeolampas Serafy, 1974
genus Atelospatangus Koch, 1885 †
genus Breynia Desor, in Agassiz & Desor, 1847
genus Chuniola Gagel, 1903 †
sub-family Echinocardiinae Cooke, 1942
genus Echinocardium Gray, 1825
genus Gualtieria Desor, in Agassiz & Desor, 1847 †
genus Hemipatagus Desor, 1858 †
genus Laevipatagus Noetling, 1885 †
genus Lovenia Desor, in Agassiz & Desor, 1847
genus Pseudolovenia A. Agassiz & H.L. Clark, 1907b
genus Semipetalion Szörényi, 1963 †
genus Spatangomorpha Boehm, 1882 †