Species: wellesi WARREN & MARISCANO, 2000
Etymology: In honor of the late Dr. Samuel Welles who first named the genus
and described the skull with the late Dr. Richard Estes.
= Taphrognathus bradyi WELLES, 1947 (referred material)
= Hadrokkosaurus bradyi (WELLES, 1947) WELLES & ESTES, 1969 (referred material)
Holotype: UCMP 31699
Locality: Geronimo (Holbrook) quarry, UC V-3922, on Highway 66, 6 miles west of Holbrook, immediately west of Geronimo Trading post, Apache County, Arizona.
Horizon: Holbrook Member, Moenkopi Formation.
Biostratigraphy:
Age: Ansian Stage, Lower Mid Triassic Epoch, Early Middle Triassic.
Material: Skull.
Referred material:
Locality: Holbrook quarry, UC V-3922, on Highway 66, 6 miles west of Holbrook, immediately west of Geronimo Trading post, Apache County, Arizona.
Horizon: Holbrook Member, Moenkopi Formation.
Biostratigraphy:
Age: Ansian Stage, Lower Mid Triassic Epoch, Early Middle Triassic.
Material:
UCMP 36836: 36250, 36837, 36840: Fragmentary skull elements.
UCMP 25431:
UCMP 37771, 76478, 76477, 75432: Left palatines.
UCMP 75432: Exoccipital.
UCMP 75431: Right vomer.
UCMP 75433, 75435, 76479: Fragments of left maxillae.
UCMP 80855: Atlas.
UCMP 36841: Right clavicle.
UCMP 36247: Left pterygoid.
UCMP 37770: Humerus.
Locality: UCMP V-4207, west end of western most butte on south side of Cameron-Grand Canyon highway, 4.5 miles west of turnoff from Cameron-Flagstaff highway, NE 1/4, sec. 26, T29N, R8E, Coconino Point SE Quadrangle, Coconino County, Arizona.
Horizon: Holbrook Member, Moenkopi Formation.
Biostratigraphy:
Age: Ansian Stage, Lower Mid Triassic Epoch, Early Middle Triassic.
Material:
UCMP 38165: Skull.