? 1914  Oma-dimeroceras (Sporadoceras) curvispina.-Sobolev,
           p.33, pl.2 fig.5a-b, textfig.15-16.
     1922  Sporadoceras biferum var. descendens Schmidt, p.279,
           textfig.9b.
     1929  Sporadoceras biferum var. descendens.-Lange, p.13.
 pt. 1931b Sporadoceras schindewolfi.-Matern, p.47.
     1936  Sporadoceras biferum var. descendens.-Paeckelmann, p.
           27.
     1956  Sporadoceras biferum descendens.-Müller, p.62.
     1960  Sporadoceras biferum descendens.-Kullmann, p.516(62)
 pt. 1966  Sporadoceras (Sporadoceras) sp.,ex aff., Sp.(Sp.)
           descendens.-Walliser, p.14, pl.2 fig.5,textfig.3d,
           (non pl.2 fig.6, textfig.3e=M.aff. ungeri).
     1993  Maeneceras descendens.-Becker: 315.