Plagiostomoceras laevigatum (Boll, 1857)

1857     Orthoceras laevigatum sp. nov. non Orthoceras laevigatum (McCoy, 1844) — Boll, pp. 71-72, fig. 3:9

1869     Orthoceras laevigatum Boll — Karsten, pp. 47, fig. 16:2a,b

1889     ?Orthoceras aff. ariel Barrande, 1868 — Rüdiger, pp. 10-11

1932     Protobactrites delicatulum sp. nov. — Troedsson, pp. 32,33, fig. 2:5; 4:3; 7:1

1952     Polygrammoceras delicatulum Troedsson — Flower, pp. 36

1984     Protobactrites delicatulum Troedsson — Dzik, pp. 105, 106, fig. text fig 39