Species: haydeni LESSNER, STOCKER, SMITH, TURNER, IRMIS, & NESBITT,
2016
Etymology:
In honor of John Hayden, who discovered the Hayden Quarry from whicht the
type and referred material was collected.
Holotype: GR 263
Locality: Hayden Quarry 2 paleochannel, Ghost Ranch, Rio Arriba County, New Mexico.
Horizon: Petrifed Forest Formation, Chinle Group.
Biostratigraphy:
Age: Middle Norian Stage, Upper Late Triassic Epoch, Late Triassic.
Material: Right maxilla.
Referred mateiral:
GR 186: Left Maxilla.
GR 391: Left premaxilla.
GR 451: Right ectopterygoid.
GR 560, 664: 2 teeth.
GR 638: Right ilium.
GR 639: Right quadrate.
GR 640: Right ectopterygoid.
GR 641: Left jugal.
GR 642: Right ilium.