1896  Goniatites elkhornensis Miller & Gurley: 37, pl.4  fig.9-11.
     1900  Neoicoceras elkhornense.-Hyatt: 550.
     1903  Neoicoceras elkhornense.-Smith: 143, pl.16 fig.9-11.
     1937  Neoicoceras elkhornense.-Plummer & Scott: 180, pl.38 fig.1-3, textfig.39.
     1966  Neoicoceras elkhornense.-Furnish & Knapp, p.302, text-fig.4C.

Holotype: 6210 Walker Museum, Univ. Chicago. Holotype (only known specimen) fragmentary.

Fig. see TAX2923, TAX5540 A (suture).