A new sex and types of Hadrosaurid dinosaurs that lived during the Cretaceous era have been determined in what is now known as New Mexico has been identified and named by excavation scientists from the United States and the Slovak Republic.
Rebuilding life Ahislessaurus wimani Based on the Holotype style and closely related species. Credit image: Sergey Krasovsky.
“Hadrosauridae“A family of large dinosaurs was one of the most abundant dinosaurs in the ecosystems of the late Cretaceous land in the inner western basin of North America for 20 million years,” said Montana State University and New Mexic University.
“This group, known as the” duck “dinosaurs, was one of the most diverse and successful dinosaur collections during the Cretaceous period.”
“During the past twenty years of the Cretaceous era, Hadrosorides achieved a global distribution and was present in Africa and the Antarctica continent, Asia, Europe, North and South America.”
Bee Ahislessaurus wimaniThe new Hadrosoride has lived during the late Cretaceous era, about 75 million years ago.
The bones of fossil dinosaurs were found in layers Kirtland formation In the AH-Shi-Sle-Pah wilderness, which is located in the province of San Juan, New Mexico, between Chako Canyon and the land de Nazin.
The researchers said: “The Holotype sample consists of an incomplete diagnostic skull, and many isolated cranial elements including the right jugal, the quarter, the ivory, the surangular, and a series of articulated cervical vertebrae,” the researchers said.
“In addition to the Holotype style, many samples of the same layers may also belong to this newly identified type, including a well -reserved left and partial skeleton, as well as two Himiri, one of which belongs to a large adult and the other to an event.”
In previous studies, Ahislessaurus wimani Referred to CressorusYounger sex of the cydorrosorid from the formation of the Kertland.
Both types are relatively closely related within the Hadrosaurid sub -category Saurolophinae.
However, according to the evolutionary analysis, they represent two distinguished groups that were present during the Kayyan era in the Cretaceous era in southern Laramidia.
“The younger Cressorus The scholars said:
Moreover, evolutionary results indicate that the class that includes Ahislessaurus and NepashoibitosaurusBesides two unveiled types from southern Laramidia, they are divided from Kritosaurini during the late Campanian (75 million years ago). “
According to the team, along with Nepashoibitosaurusand Ahislessaurus It forms a possible new set of flat -headphone hadorovidate.
The authors said: “This Clade notes that the Surolovin was a variety of classification, which, during the past twenty years of the Cretaceous period, was among the dominant herbacco dinosaurs in southern Laramidia.”
“The recognition of new types of Hadrosior from New Mexico provides additional evidence of longitudinal variation in the hideosoride animals during the late Cretaceous era in Laramidia.”
team paper It will be published in New Mexico Museum for Natural History and Science Bulletin.
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Sebastian Dalman And others. 2025. One of the members of the Alawite fisherman (Campanian), member of the fisherman, Kirland formation, San Juan, New Mexico. New Mexico Museum for Natural History and Science Bulletin 101