Keenocardium californiense middendorffi A.I. Kafanov, 1999 Russia, Okhotsk Sea
Keenocardium chejsliensis (FOSSIL) (V.N. Sinelnikova,1990 †) Russia, Sakhalin
Keenocardium kakertense (FOSSIL) (V.N. Sinelnikova,1990 †) Western Kamchatka
Keenocardium kljutschiense (FOSSIL) (Krishtofovich, 1969 †) Eastern Kamchatka
Keenocardium kuluvense (FOSSIL) A.I. Kafanov, 1984 † Western Kamchatka
Keenocardium matschiense (FOSSIL) A.I. Kafanov, 1984 † Western Kamchatka
Keenocardium menneri (FOSSIL) A.I. Kafanov, 1984 † Western Kamchatka
Keenocardium ornatocostatum (FOSSIL) (Volobueva, 1981 †) Eastern Kamchatka
Keenocardium prosogyratum (FOSSIL) (A.I. Kafanov, 1994 †) Russia, Sakhalin
Keenocardium raricostatum (FOSSIL) A.I. Kafanov, 1994 † Russia, Sakhalin
Keenocardium starobogatovi (FOSSIL) A.I. Kafanov & Savizky,1982 † Russia, Moneron Island
Keenocardium tigilense (FOSSIL) (Slodkewitsch, 1938 †) Western Kamchatka
Laevicardium brasilianum (J.B.P.A. Lamarck, 1819) Florida29 mm
Laevicardium castanea E. Vidal, 2005 Italy, Livorno29,6 mm
Laevicardium clarionense (L.G. Hertlein& A.M. Strong, 1947) Panama, Chiriqui Bay
Laevicardium compressum (FOSSIL) W.H. Dall, 1900 † Florida23 mm
Laevicardium crassum (J.F. Gmelin, 1791) Bahamas53 mm
Laevicardium decorticatum (FOSSIL) Wood, 1840 † Belgium78 mm
Laevicardium ecuadoriale (FOSSIL) A.A. Olsson, 1932 † Ecuador, Esmeraldas, Eloy Alfaro
Laevicardium elatum (I, 1833) Mexico, Baja California132 mm
Laevicardium etheringtoni (FOSSIL) Slodkewitsch, 1938 † Russia, Kamchatka, Olyutorskiy rayon
Laevicardium excomatulum (FOSSIL) M. Glibert & Poel, 1965 † Germany, Mecklenburg16 mm
Laevicardium kirkinskayae (FOSSIL) Krishtofovich, 1957 † Russia, Sakhalin
Laevicardium kovacovense (FOSSIL) Senes, 1958 † Hungary, Bükk28 mm
Laevicardium kuluvense (FOSSIL) V.N. Sinelnikova, 1980 † Western Kamchatka
Laevicardium leptorinum (FOSSIL) D.T. Dockery, 1982 † USA, Mississippi13 mm
Laevicardium lobulatum (G.P. Deshayes, 1855) Philippines, Leyte30,6 mm
Laevicardium majanatschensis (FOSSIL) V.N. Sinelnikova, 1990 † Western Kamchatka
Laevicardium melvilli (FOSSIL) R.B. Newton, 1905 † Pakistan, Baluchistan, Makran
Laevicardium mortoni (T.A. Conrad, 1831) Bahamas14,2 mm
Laevicardium multilineatum W.H. Dall & W. Stimpson,1901 Venezuela44 mm
Laevicardium nemo E. Fischer-Piette, 1977
Laevicardium nemocardiforme (FOSSIL) A.I. Kafanov & Savizky,1983 † Russia, Sachalin
Laevicardium oblongum (J.F. Gmelin, 1791) Spain65 mm
Laevicardium pictum (E. Ravenel, 1861) Florida14,5 mm