SPIELMANN, & LUCAS, 2012

Locality: Shark Tooth Hill, NMMNH Locality 487, T9N, R34E, Sec 28, SE1/4, E1/4, NE1/4, Wheatland 7.5’ 1972, South of San Jon, (YPM), Apache Canyon, Quay County, East-Central New Mexico.

Horizon: Duke Ranch Member, Upper Redonda Formation, Chinle Group.

Biostratigraphy: Apachean characteristic assemblage.

Age: Apachean, Late Norian Stage- Rhaetian Stage, Upper Late Triassic Epoch, Late Late Triassic.

Material:

NMMNH P-17091: 2 keeled osteoderm fragments with fine pitting.