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Proclydonautilus spirolobus
Taxonomy
Nautilus spirolobus was named by Dittmar (1866).
It was recombined as Clydonautilus (Proclydonautilus) spirolobus by von Mojsisovics (1902); it was recombined as Proclydonautilus spirolobus by Smith (1927), Kummel (1953), Bychkov et al. (1976), Schastlivtseva (1988), Sobolev (1989).
It was recombined as Clydonautilus (Proclydonautilus) spirolobus by von Mojsisovics (1902); it was recombined as Proclydonautilus spirolobus by Smith (1927), Kummel (1953), Bychkov et al. (1976), Schastlivtseva (1988), Sobolev (1989).
Sister species lacking formal opinion data