1856 in paleontology explained

Vertebrates

Name	Status	Authors	Age	Unit	Notes
Deinodon^[5]	Nomen dubium	Joseph Leidy	Late Cretaceous (Campanian)	Judith River Formation	Might be a subjective synonym of Gorgosaurus or Daspletosaurus.
Dinosaurus^[6]	Preoccupied.	Rütimeyer	Late Triassic (Rhaetian)	Knollenmergel	Preoccupied by a genus erected by Fischer von Waldheim in 1847. Renamed Gresslyosaurus
Gresslyosaurus^[7]	Disputed.	Rütimeyer	Late Triassic (Rhaetian)	Knollenmergel	Possible subjective synonym of Plateosaurus
Palaeoscincus	Nomen dubium	Joseph Leidy	Late Cretaceous (Campanian)	Judith River Formation	Possible subjective synonym of Edmontonia or Panoplosaurus.
Thespesius	Nomen dubium	Joseph Leidy	Late Cretaceous (Maastrichtian)	Great Lignite Formation (=Lance Formation)	A dubious hadrosaurid.
Trachodon	Nomen dubium	Joseph Leidy	Late Cretaceous (Campanian)	Judith River Formation	A dubious hadrosaurid.
Troodon	Disputed.	Joseph Leidy	Late Cretaceous (Campanian)	Judith River Formation	A potentially dubious troodontid.

Makarkin . V.N. . Archibald . S.B. . Mathewes . R.W. . 2021 . New Protosmylinae (Neuroptera: Osmylidae) from the early Eocene of western North America, with taxonomic remarks . Zootaxa . 4980 . 1 . 142–156.
Monographie der fossilen fische des silurischen systems des Russisch-baltischen gouvernements. CH Pander, 1856
Lea, I. 1856. Description of Centemodonsulcatus. Proceedings of the Academy of NaturalSciences, Philadelphia 10: pp. 77-78.
Quenstedt, F. A. 1856. Sonst und Jetzt.Populäre Vorträge über Geologie. Tübingen:Laupp. [pp. 128, 130].
Leidy, J. 1856. Notices of the remains of extinctreptiles and fishes, discovered by Dr. F.V. Haydenin the badlands of the Judith River, NebraskaTerritory. Proc Acad. Nat. Sci. 1856: pp. 72-72.
Rutimeyer. L. 1856. (Dinosaurus gresslyi).Biblio. Universelle Geneve Arch. September 1856: p.53.
Rutimeyer. L. 1856. Reptilienknochen aus demKeuper. Allg. Schweiz. Ges. Ge samt. Naturwiss.Verh. 41: pp. 62-64.