Poromya adelaidis (C. Hedley, 1916)
Cetomya albida (W.H. Dall, 1886)
Psilomya allani (FOSSIL) Warren, 1933 †
Liopistha alta (FOSSIL) (F.A. Roemer, 1852 †)
Neaeroporomya argentea (FOSSIL) (J.B.P.A. Lamarck,1806 †)
Poromya australis E.A. Smith, 1885
Cetomya bacata E.M. Krylova, 2001
Cetomya butoni (B. Prashad, 1932)
Dermatomya buttoni W.H. Dall, 1916
Poromya carinata T.C. Lan, 2000
Poromya castanea (T. Habe, 1952)
Cetomya celsa E.M. Krylova, 2001
Dermatomya chilensis (W.H. Dall, 1908)
Psilomya concentrica (FOSSIL) Stanton †
Cetomya curta (G.B. III Sowerby, 1904)
Poromya cymata W.H. Dall, 1890
Cetomya elongata (W.H. Dall, 1886)
Cetomya eximia (J.P.L. Pelseneer, 1911)
Poromya flexuosa M. Yokoyama, 1922
Dilemma frumarkernorum J.H. Leal, 2008
Liopistha glabra (FOSSIL) Warren, 1934 †
Poromya globulosa (FOSSIL) E. Forbes, 1846 †
Poromya granifera (B.C. Cotton, 1931)
Poromya granosissima G.B. III Sowerby, 1904
Poromya granulata (P. Nyst & G.D. Westendorp,1839)
Poromya granuloderma O.A. Scarlato, 1981
Poromya hayashii T. Habe, 1958
Poromya houbricki F.R. Bernard, 1989
Lissomya hyalina (F.R. Bernard, 1989)
Poromya illevis C. Hedley, 1913
Dilemma inexpectatum (M.A. Crozier, 1966)
Liopistha inflata (FOSSIL) R.P. Whitfield, 1885 †
Cetomya intermedia (T. Habe, 1952)
Poromya intracta (R. Sturany, 1899)
Dilemma japonicum T. Sasaki & J.H. Leal,2008