HECKERT, SPIELMANN, LUCAS & HUNT, 2007
Locality: Placerias quarry (UCMP A269, MNA 207C), Big Hollow Wash
near Romero Springs, a small valley 6 1/2 miles (approximately 10.4 km) S 65"W
of St. Johns, Apache County, Arizona.
Note: Located 0.3 miles northwest of Romero Springs at approximately Long.
109'28'W and lat. 34"27'N on the USGS St. Johns quadrangle of 1921.
Horizon: Bluewater Creek Formation, Lower Chinle Group.
Biostratigraphy:
Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
UCMP A269/126847: Paramedian osteoderm fragment.
UCMP A269/136/744: Incomplete right paramedian fragment.
Locality: NMMNH L-3252, Zuni Mountains, West Central New Mexico.
Horizon: Bluewater Creek Formation, Lower Chinle Group.
Biostratigraphy:
Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
NMMNH P-28422: Osteoderm fragment.
Locality: Blue Hills, East-Central Arizona.
Horizon: Blue Mesa Member, Petrified Formation.
Biostratigraphy:
Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
UCMP 7307/27049: Osteoderm.
Locality: L-7 Ranch near Cedar Hill, Crosby County, Western Texas.
Horizon: Tecovas Formation, Chinle Group (Dockum Group).
Biostratigraphy:Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
TTUP 10079: Incomplete carapace.