Genus: Hadrosaurus LEIDY, 1858
Etymology: Greek, hadros, “bulky, stout, strong, powerful”, and Greek, sauros, “lizard”: “Bulky lizard”.
= Hadrasaurus COPE, 1869 (sic)
= Hodeosaurus WU, 1985 (sic)
= Madrosaurus SAUVAGE, 1883 (sic)
= Ornithosaurus RIABININ, 1930 (sic)
= Ornithotarsus COPE, 1969
Etymology: Greek, ornith- (ornis), “bird”, and Greek, tarsos, “tarsus”: “Bird tarsus”.

Species: foulkii LEIDY, 1858
Etymology: In honor of William Parker Foulke (1816–1865).
= Trachodon foulkii (LEIDY, 1858) LYDEKKER, 1888
= Hadrosaurus foulkei COPE, 1870 (sic)
= Hadrosaurus faulkii LANGSTON, 1960 (sic)

Holotype: ANSP 10005

Locality: On the south branch of Cooper's Creek, Haddonfield, Camden County, New Jersey.

Horizon: Woodbury Formation, Matawan Group.

Biostratigraphy:

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

Material: Mandibular teeth, fragment of dentary, 28 vertebrae, humerus, radius, ulna, ilium, ischium, femur, tibia, fibula and two metatarsals.

Referred material:

HORNER, 1979

Locality: 6 miles NW of Freehold, Monmouth County, New Jersey.

Horizon: Englishtown-Marshalltown Formation, Matawan Group.

Biostratigraphy:

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

Material:

AMNH 7626: Partial jaw.


Locality: 5 miles NW of Freehold on Rte. 9 at Manalapan-Marlboro Township line, 3/4 mile N of Gordons’ Corner, Monmouth County, New Jersey.

Horizon: Matawan Group.

Biostratigraphy:

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

Material:

YPM 21813, 21824: Partial jaw.

 

LYDEKKER, 1888

Locality: Huddersfield, New Jersey.

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material:

BMNH R1007: Transverse section of a tooth.

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Species: cavatus COPE 1871 (nomen dubium)
Etymology: Latin, cavatus, "hollow, hollowed out, excavated."
= Trachodon cavatus (COPE, 1871) HAY, 1902 (nomen dubium)

Holotype: AMNH 1390

Locality: “Greensand No. 5”, Near Swedesboro, New Jersey.

Horizon: Upper Green sand bed, probably Navesink Formation, Monmouth Group.

Biostratigraphy:

Age: Middle Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material: 4 caudal vertebrae.

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Species: minor MARSH, 1870 (nomen dubium)
Etymology: Latin, minor, "minor, small."
= Edmontosaurus (“Hadrosaurus”) minor BAIRD & HORNER, 1977

Holotype: YPM 1600

Locality: Near Barnsboro, Gloucester County, New Jersey.

Horizon: Hornerstown Formation, Rancocas Group.

Biostratigraphy:

Age: Late Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Or more likely Chocolate marl, or Navesink Formation, Monmouth Group.

Biostratigraphy:

Age: Middle Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material: Several dorsal and lumbar vertebrae.

Referred material:

Locality: Turner's Pits, Swedesboro, New Jersey.

Horizon: Marshalltown Formation, Matawan Group.

Biostratigraphy:

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

Material:

YPM 1587: Fragment of femur.

 


Locality: Mullica Hill, Gloucester County, New Jersey.

Horizon: Hornerstown Formation, Rancocas Group.

Biostratigraphy:

Age: Late Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Or more likely Navesink Formation, Monmouth Group.

Biostratigraphy:

Age: Middle Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material:

YPM 1593: Posterior dorsal?

 


Locality: Sewell, New Jersey.

Horizon: Hornerstown Formation, Rancocas Group.

Biostratigraphy:

Age: Late Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material:

ANSP 15237:

 

COLBERT, 1948

Locality: From a pit at the Hungerford and Terry Corporation, Near Sewell, Gloucester County, New Jersey.

Horizon: Navesink Formation, Monmouth Group.

Biostratigraphy:

Age: Middle Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material:

ANSP 15202: Pubis, fragment of ischium, right femur, fragmentary fibula, anterior dorsal vertebrae, anterior caudal vertebrae, and chevron.

 

GALLAGHER, 1993

Locality: Inversand Company Pit, Sewell, Mantua Township, Gloucester County, New Jersey.

Horizon: Navesink Formation, Just below contact with overlying Hornerstown Formation, Monmouth Group.

Biostratigraphy:

Age: Middle Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material:

NJSM 15136: Vertebral centrum.

 


GALLAGHER & PARRIS

Locality: Inversand Company Pit, Sewell, Mantua Township, Gloucester County, New Jersey.
.
Horizon: Navesink Formation, Monmouth Group.

Biostratigraphy:

Age: Middle Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material:

NJSM 11880: Left tibia.

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Species: ? breviceps MARSH, 1889 (nomen dubium)
Etymology: Latin, brevis, "short" and Latin, -ceps, "head."
= Kritosaurus breviceps (MARSH, 1889) LULL & WRIGHT, 1942 (nomen dubium)
= Trachodon breviceps (MARSH, 1889) HAY, 1902 (nomen dubium)

Holotype: YPM 1779

Locality: At the mouth of the Judith River as it enters the Missouri, Bearpaw Mountain, Yellowstone, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Right dentary fragment.

Referred material:

SAHNI, 1972

Locality: Clambank Hollow, Chouteau County, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

AMNH 8525: About a dozen teeth.