Genus: Hypsibema COPE, 1869 (nomen dubium)
Etymology: Greek, hypsi, “high” and Greek, bema, “step”, (N) because the metatarsals in the foot supposedly indicated “the Hypsibemas walked more directly on the toes than did the Hadrosaur, and Greek, sauros, “lizard”: “high step”.
= Hypsibaema HUENE, 1909 (sic)
= Neosaurus GILMORE, vide GILMORE & STEWART, 1945 non NOPCSA, 1923Etymology: Greek, neos, “new, unexpected”, and Greek, sauros, “lizard”: “unique lizard”.
= Parrasaurus WHITE, 1973 (sic)
= Parrosaurus GILMORE, 1945 (nomen dubium)
Etymology: In honor of Albert Eide Parr. American zoologist and then director of the American Museum of Natural History, and Greek, sauros, “lizard”: “Parr’s lizard”.

Species: crassicauda COPE, 1869
Etymology:

Lecotype: USNM 7189

Locality: James King's marl pits in Sampson County, North Carolina.

Horizon: Black Creek Formation.

Biostratigraphy:

Age: Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Caudal centrum, distal end of humerus, tibal shaft and a metatarsal.

Referred material:

MILLER, 1967

Locality: Phoebus Landing, Cape Fear River, Bladen County, North Carolina.

Horizon: Black Creek Formation.

Biostratigraphy:

Age: Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

USNM 6136: Caudal vertebra.

USNM 7189:

USNM: 7093, 7094, ?10312: Caudal vertebrae.
Note: Hadrosaurus tripos

ANSP 15307: Caudal vertebra.

ANSP 15307A-C: 3 vertebrae.

ANSP 15322: Fragment of scapula.

ANSP 15329: Probably a postzygapophysis.

ANSP 15306: Small right dentary.

ANSP: 15338: Caudal vertebra.

USNM 10312: Caudal neural spine.

 

= Hadrosaurus minor? LULL & WRIGHT, 1942, non MARSH, 1870

Locality:

Horizon:

Biostratigraphy:

Age:

Material:

USNM 7096: Right dentary fragment.

Referred material:

GALLAGHER, PARRIS & SPAMER, 1986

Locality: Ellisdale Locality, Monmouth County, New Jersey.

Horizon: Basal Marshalltown Formation, Matawan Group.

Biostratigraphy:

Age: Upper Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NJSM 12702:

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Species: missouriense (GILMORE & STEWART, 1945) BAIRD & HORNER, 1979 (nomen dubium)
Etymology:
= Neosaurus missouriensis GILMORE vide GILMORE & STEWART, 1945) (nomen dubium)
= Parrosaurus missouriensis (GILMORE vide GILMORE & STEWART, 1945) GILMORE, 1945 (nomen dubium)

Holotype: USNM 16735

Locality: Chronister farm, sec. 26, T31N, R9E, about 1 mile north of Glen Allen, Bollinger County, Missouri.

Horizon: McNairy Sand Member, Ripley Formation.

Biostratigraphy: Middle Mosasaurus Acme-zone.

Age: Uppermiddle Navesinkan Age, Lower Maastrichtian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: 13 caudal centra, a fragment of left maxilla and a fragment of a predentary.