Genus: Maiasaura HORNER & MAKELA, 1979

Oospecies: peeblesorum HORNER & MAKELA, 1979

Holotype: PU 22405

Locality: Locality TM-008, 12 miles west of Choteau, on the James and John Peebles Ranch, Teton County, Montana.

Horizon: Two Medicine Formation.

Biostratigraphy:

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

Material: Skull with partial right dentary and predenatry.

Referred material:

PU 22400: skeletons of 15 individuals, of babes, juveniles and adults.

Numerous eggs, eggshells, and nests.

HIRSCH & QUINN, 1990

MOR 325/HEC 366: 1 nest with 3 partial eggs.

UCM 54475/HEC 314, UCM 58024/HEC 376, UCM 58025/HEC 377: Isolated eggshell fragments from 3 areas near the hadrosaur nests.

 

Locality: Cairn 2 (TM-012), Teton County, Montana.

Horizon: Two Medicine Formation.

Biostratigraphy:

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

Material:

UCM 58023/HEC 346-1, 2, 3: 96 fragments in which the outer surface was sculptured with ridges.

UCM 58023/HEC 346-4: Fragments in which the outer surface was sculptured with nodes.

UCM 58023/HEC 346-5: 9 fragments with a smooth outer surface.

 

HORNER, 1988

Locality: Lower Maiasaura nesting ground, 12 miles west of Choteau, on the James and John Peebles Ranch, Willow Creek Anticline, Teton County, Montana.

Horizon: Two Medicine Formation.

Biostratigraphy:

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

Material:

Number: Not given:

 

Locality: Upper Maisaura nesting ground, 12 miles west of Choteau, on the James and John Peebles Ranch, Willow Creek Anticline, Teton County, Montana.

Horizon: Two Medicine Formation.

Biostratigraphy:

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

Material:

Number: Not given:

HORNER & WEISHAMPEL, 1988

YPM-PU 224321: 1 nest with eggshell fragments and hatchlings, also embryonic remains from an egg.