1897  Gephyroceras Keyserlingi.-Foord & Crick: 288.
     1899  Gephyroceras Keyserlingi Holzapfel, p.38, pl.6 fig.1-6.
     1913  Gephyroceras (Gephyroceras) keyserlingi.-Frech, p.22.
non 1852  Ammonites keyserlingi.-Giebel, p.468.
non 1897  Gephyroceras keyserlingi.-Foord & Crick, p.288, fig.142.
     1969  Probeloceras ? keyserlingi.-Bogoslovskii: 215, text-fig.58v, pl.12 fig.4, 5.
     1997  Probeloceras keyserlingi.-Kuzmin & Yatskov: 31.

Fig. see TAX1115 C (cross-section).