Ahshislesaurus, new saurolophine hadrosaurid from Cretaceous of New Mexico (free pdf)
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Ben Creisler
Oct 1, 2025, 11:26:14 AM10/1/25
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Ben Creisler
A new paper:
Ahshislesaurus wimani gen. et sp. nov.
Sebastian G. Dalman, Steven E. Jasinski, D. Edward Malinzak, Spencer G. Lucas, Martin Kundrát, and Anthony R. Fiorillo (2025)
A new saurolophine hadrosaurid (Ornithischia: Hadrosauridae) from the Upper Cretaceous (Campanian) Hunter Wash Member, Kirtland Formation, San Juan Basin, New Mexico
in: Lucas et al., 2025, Fossil Record 11. New Mexico Museum of Natural History and Science Bulletin 101: 73--114
https://www.researchgate.net/publication/396005330_A_new_saurolophine_hadrosaurid_Ornithischia_Hadrosauridae_from_the_Upper_Cretaceous_Campanian_Hunter_Wash_Member_Kirtland_Formation_San_Juan_Basin_New_Mexico
A new saurolophine hadrosaurid dinosaur, Ahshislesaurus wimani gen et sp. nov., from the lower Hunter Wash Member of the lower Kirtland Formation (~75.02 Ma) of New Mexico is described. The specimen was briefly described before and referred to the stratigraphically younger Kritosaurus navajovius, which is known from the De-na-zin Member (~73.83–73.49 Ma) of the uppermost Kirtland Formation. The holotype of A. wimani consists of an incomplete diagnostic skull, several isolated cranial elements including the right jugal, quadrate, dentary, and surangular, and a series of articulated cervical vertebrae. In addition to the holotype of A. wimani, several specimens from the same strata may also belong to this newly identified species, including a well-preserved left dentary and a partial skeleton, as well as two humeri, one belonging to a large adult and the other to a juvenile. The skull of A. wimani preserves several taxonomically informative characters that show close affinities with the stratigraphically younger Naashoibitosaurus ostromi from the De-na-zin Member. Together with Naashoibitosaurus, Ahshislesaurus forms a potentially novel clade of flat-headed saurolophine hadrosaurids. This clade suggests the saurolophines were a taxonomically diverse group, which, during the last 20 million years of the Cretaceous, were among the dominant herbivorous dinosaurs in southern Laramidia. Recognition of a new hadrosaurid species from New Mexico also provides further evidence for latitudinal variation in the hadrosaurid fauna during the Late Cretaceous in Laramidia.
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Free pdf:
Free pdf:
Ahshislesaurus wimani gen. et sp. nov.
Sebastian G. Dalman, Steven E. Jasinski, D. Edward Malinzak, Spencer G. Lucas, Martin Kundrát, and Anthony R. Fiorillo (2025)
A new saurolophine hadrosaurid (Ornithischia: Hadrosauridae) from the Upper Cretaceous (Campanian) Hunter Wash Member, Kirtland Formation, San Juan Basin, New Mexico
in: Lucas et al., 2025, Fossil Record 11. New Mexico Museum of Natural History and Science Bulletin 101: 73--114
https://www.researchgate.net/publication/396005330_A_new_saurolophine_hadrosaurid_Ornithischia_Hadrosauridae_from_the_Upper_Cretaceous_Campanian_Hunter_Wash_Member_Kirtland_Formation_San_Juan_Basin_New_Mexico
A new saurolophine hadrosaurid dinosaur, Ahshislesaurus wimani gen et sp. nov., from the lower Hunter Wash Member of the lower Kirtland Formation (~75.02 Ma) of New Mexico is described. The specimen was briefly described before and referred to the stratigraphically younger Kritosaurus navajovius, which is known from the De-na-zin Member (~73.83–73.49 Ma) of the uppermost Kirtland Formation. The holotype of A. wimani consists of an incomplete diagnostic skull, several isolated cranial elements including the right jugal, quadrate, dentary, and surangular, and a series of articulated cervical vertebrae. In addition to the holotype of A. wimani, several specimens from the same strata may also belong to this newly identified species, including a well-preserved left dentary and a partial skeleton, as well as two humeri, one belonging to a large adult and the other to a juvenile. The skull of A. wimani preserves several taxonomically informative characters that show close affinities with the stratigraphically younger Naashoibitosaurus ostromi from the De-na-zin Member. Together with Naashoibitosaurus, Ahshislesaurus forms a potentially novel clade of flat-headed saurolophine hadrosaurids. This clade suggests the saurolophines were a taxonomically diverse group, which, during the last 20 million years of the Cretaceous, were among the dominant herbivorous dinosaurs in southern Laramidia. Recognition of a new hadrosaurid species from New Mexico also provides further evidence for latitudinal variation in the hadrosaurid fauna during the Late Cretaceous in Laramidia.
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