90.2.7a Z1.19.6a

YPM 4676?

Apatosaurus axax
(Holotype)

Marsh, 1877

Jefferson Co. Colorado

Jurassic, Morrison fm

10 CM

SVP

90.2.7d-21.19.6d

YPM 4676?

Apatosaurus axax
(Holotype)

Marsh, 1877

Jefferson Co. Colorado

Jurassic, Morrison fm

10 CM

SVP