Malletia abrupta (FOSSIL) (T.A. Conrad, 1848 †)
Clencharia abyssicola (E.A. Smith, 1885)
Malletia abyssopolaris A.H. Clarke, 1960
Clencharia abyssorum (A.E. Verrill & K.J. Bush,1898)
Palaeoneilo acarinata (FOSSIL) G.B. Campbell & H. Engel,1963 †
Malletia alata F.R. Bernard, 1989
Carinineilo angulata (G.B. III Sowerby, 1888)
Dysodonta angulata (FOSSIL) Pojeta & al. 1986 †
Neilo annectens Powell, 1931
Nuculites antiqua (FOSSIL) (Sowerby 1839 †)
Malletia aoteana (B.A. Marshall, 1978)
Malletia arciformis W.H. Dall, 1908
Palaeoneilo arctica (FOSSIL) Muromtseva, 1981 †
Malletia armudanensis (FOSSIL) Lautenschläger, 1968 †
Malletia arrouana E.A. Smith, 1885
Palaeoneilo artiensis (FOSSIL) Stuckenberg, 1898 †
Quadratonucula asymmetrica (FOSSIL) C.O. Waterhouse, 1964 †
Nuculites atreus (FOSSIL) Reed †
Nuculites atreus woolhopensis (FOSSIL) Reed †
Quadratonucula australiensis (FOSSIL) Dickins, 1963 †
Neilo australis (J.R.C. Quoy& J.P. Gaimard, 1835)
Neilo awamoana (FOSSIL) Finlay, 1926 †
Metapalaeoneilo baltica (FOSSIL) Lamke 1934 †
Metapalaeoneilo baltica (FOSSIL) Lamcke, 1934 †
Malletia benthima W.H. Dall, 1908
Neilo beui (FOSSIL) J.D. Stilwell& Zinsmeister, 1992 †
Palaeoneilo beushauseni (FOSSIL) Kegel, 1913 †
Spineilo bicarinata (FOSSIL) Kalishevich, 1973 †
Myoplusia bilunata (FOSSIL) (Barrande, 1881 †)
Neilo biradiata (FOSSIL) Chiesa & Camacho, 2001 †
Neilo bisculpta F.S. Xu, 1991
Neilo blacki Marshall, 1978
Concavoleda braulense (FOSSIL) Sanchez, 1999 †
Malletia brevis E.A. Smith, 1906
Spathelopsis browni (FOSSIL) Hoare & al., 1989 †