Pseudonautilidae

• Pseudonautilus: Shell involute, compressed; whorl section higher than wide, flanks flattened; venter broadly arched; umbilicus small and deep; suture with deep narrow ventral lobe, large V-shaped lateral lobes on either side followed by rounded saddles then smaller lobes just above the umbilical seam; siphuncle subventral. Found in Europe and North Africa. An almost perfect homeomorph of the Permian Permoceras. Range as for family.
• Pseudaganides Nautiliconic; whorl section subrectangular to compressed with flattened flanks converging toward a flattened to rounded venter; suture with ventral lobe and broad deep lateral lobes; siphuncle central to subcentral.. Found in the Jurassic of Europe and Pakistan.
• Xenocheilus Like Pseudonautilus but with subangular ventral shoulders and rounded, rather than pointed, lateral lobes. From the Upper Jurassic and Lower Cretaceous of Europe and north Aftrica.