Genus: Ahshislesaurus DALMAN, JASINSKI, MALINZAK, LUCAS, KUNDRAT & FIORILLO, 2025
Etymology: In reference to the Ah-shi-sle-pah Wash Wilderness in the lower Hunter Wahs Member of the Kirtland Formation in northwestern New Mexico where the new species was found. Ash-shi-sle-pah Wilderness is located in San Juan County, New Mexico, between Chaco Canyon and the Dena-zin Wilderness. Its name is a phonetic transliteration of Navajo "ashijih liba" meaing "salt, it is gray," and Greek, sauros, “lizard”: “Awake lizard”.

Species: wimani DALMAN, JASINSKI, MALINZAK, LUCAS, KUNDRAT & FIORILLO, 2025
Etymology: In honor of the first Swedish professor of palaeontology, Carl Wiman (1867-1944) from Uppsala University, who worked on fossil vertebrates from the San Juan Basin.
= Hadrosaurinae gen. sp indet. GILMORE, 1935

Holotype: USNM VP-8629

Locality: Ah-shi-sle-pah Wilderness study area, Bisti/De-na-zin Wilderness area, 4 miles southwest of Kimbetoh, San Juan County, Northwestern New Mexico.

Horizon: Lower Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Late Campanian Stage, Late Senonian Subepoch, Guld Epoch, Late Cretaceous.

Material: Posterior skull roof consisting of prefrontals, frontals, postorbitals, squamosals, the right and left quadrates, parietal and braincase, right jugal, left dentary, right surangular, the axis and third and fourth cervical vertebrae.

Note: LUCAS et al, (1987) and HORNER (1992), refere this to Kritosaurus navajovius, WILLIAMSON, 2000 notes that it is undignostic not referable to Kritosaurus.

Referred material:

Locality: NMMNH L locality 8852, Ah-shi-sle-pah Wilderness study area, Bisti/De-na-zin Wilderness area, San Juan County, Northwestern New Mexico.

Horizon: Lower Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Late Campanian Stage, Late Senonian Subepoch, Guld Epoch, Late Cretaceous.

Material:

NMMNH P-66929: Left dentary.

 

Locality: NMMNH L 3117, Ah-shi-sle-pah Wilderness study area, Bisti/De-na-zin Wilderness area, San Juan County, Northwestern New Mexico.

Horizon: Lower Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Late Campanian Stage, Late Senonian Subepoch, Guld Epoch, Late Cretaceous.

Material:

NMMNH P-25057: 36 vertebrae, including 2 isolated and nearly comploete spinal processes of the caudal vertebrae; 12 cervical, 2 dorsal, 4 sacral and 6 caudal vertebrae, 4 complete chevrons, 9 isolated dorsal ribs, whereas 5 additional ribs are attached to their respective dorsal vertebrae, left ilium, anterior end of left prepubic process, right and left ischium elements, left femur, left tibia, left fibula, right M-II, M-111, and left M-IV.

 

Locality: NMMNH L RMS 2013-7, Ah-shi-sle-pah Wilderness study area, Bisti/De-na-zin Wilderness area, San Juan County, Northwestern New Mexico.

Horizon: Lower Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Late Campanian Stage, Late Senonian Subepoch, Guld Epoch, Late Cretaceous.

Material:

NMMNH P-RMS 2013-7: Left scapula.

 

Locality: NMMNH L 4014, Ah-shi-sle-pah Wilderness study area, Bisti/De-na-zin Wilderness area, San Juan County, Northwestern New Mexico.

Horizon: Lower Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Late Campanian Stage, Late Senonian Subepoch, Guld Epoch, Late Cretaceous.

Material:

NMMNH P-31928: Left humerus.

 

Locality: NMMNH L 5412, Ah-shi-sle-pah Wilderness study area, Bisti/De-na-zin Wilderness area, San Juan County, Northwestern New Mexico.

Horizon: Lower Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Late Campanian Stage, Late Senonian Subepoch, Guld Epoch, Late Cretaceous.

Material:

NMMNH P-37624: Left humerus of a juvenile.

 

Locality: NMMNH L RMS 2012-7, Ah-shi-sle-pah Wilderness study area, Bisti/De-na-zin Wilderness area, San Juan County, Northwestern New Mexico.

Horizon: Lower Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Late Campanian Stage, Late Senonian Subepoch, Guld Epoch, Late Cretaceous.

Material:

NMMNH P-32885: Isolated right ulna.

 

Locality: NMMNH L 9277, Ah-shi-sle-pah Wilderness study area, Bisti/De-na-zin Wilderness area, San Juan County, Northwestern New Mexico.

Horizon: Lower Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Late Campanian Stage, Late Senonian Subepoch, Guld Epoch, Late Cretaceous.

Material:

NMMNH P-102629: Isolated left ilium.