1924  Glatziella nucleus Schmidt: 119, pl.6 figs 10, 10a  (non 11).
pt.?1929 ? Prionoceras, ? Gattendorfia (Balvia) nucleus.-Lange: 61.
     1937  Prionoceras nucleus.-Schindewolf: 24.
     1959  Prionoceras (?) globularis var. tetragona.-Petter: 257.
     1960  Kenseyoceras (Mayneoceras) nucleus.-Selwood: 172, pl.28 fig.11-17, textfig.5b,6.
     1992  Balvia nucleus.-Korn: 24, pl.2 fig.2E.
     1994  Balvia nucleus.-Korn: 33, textfig. 24H-L.
     1996  Balvia (Mayneoceras) nucleus.-Becker: 34, text-fig.4; pl.3 fig.4-5.
     2005  Balvia (Mayeneoceras) nucleus.-Nikolaeva & Bogoslovskii: S535, pl.1 fig.10-12.

Fig. see TAX677, in comparison some other species of Balvia [from Korn, 1994, p.7, fig.2].