Agaresuchus Temporal range: | |
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Holotype skull of Agaresuchus subjuniperus | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Clade: | Archosauria |
Clade: | Pseudosuchia |
Clade: | Crocodylomorpha |
Clade: | Crocodyliformes |
Clade: | Neosuchia |
Clade: | Eusuchia |
Clade: | † Allodaposuchidae |
Genus: | † Agaresuchus Narváez et al., 2016 |
Type species | |
†Agaresuchus fontisensis Narváez et al., 2016 | |
Species | |
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Agaresuchus is an extinct genus of allodaposuchid eusuchian crocodylomorph from the Late Cretaceous (Campanian-Maastrichtian) of Spain. It includes two species, the type species Agaresuchus fontisensis, and Agaresuchus subjuniperus, which was originally named as a species of the related genus Allodaposuchus . However, it has been proposed that both species may instead belong to the genus Allodaposuchus.
The genus Agaresuchus was named in 2016 upon the discovery of Agaresuchus fontisensis . Allodaposuchus subjuniperus, discovered in 2013 and originally classified as a new and second species of Allodaposuchus , was then reassigned to Agaresuchus.
A. subjuniperus was named in 2013 on the basis of a skull from the late Maastrichtian-aged Conquès Formation, part of the Tremp Group, in the province of Huesca, Spain. The skull was found underneath a juniper tree whose roots had grown between the bones, hence the specific name subjuniperus or "under juniper" in Latin. [1]
In 2016, the new genus and species Agaresuchus fontisensis was discovered and described. The genus name refers to the demon Agares, depicted by Johann Weyer as an old man riding a crocodile. The specific name was named from the Lo Hueco fossil site in Fuentes, Cuenca, Spain; fontes is the Latin name of Fuentes.
The two species differ in traits such as the shape of the snout (elongated in the former, short in the latter); the shape of the premaxilla (longer than wide compared to wider than long); the number of maxillary tooth sockets (15 compared to 14); the shape of the eye sockets (large and round compared to short and crescent-shaped); the width between the eyes (narrow compared to characteristically broad); and characteristics of the palate and nasal bones. However, they were considered to be sufficiently distinct from the eastern European Allodaposuchus precedens to warrant a new genus. [2]
Alternatively, a 2021 phylogenetic analysis considering additional postcranial material recovered Allodaposuchus as paraphyletic with respect to Agaresuchus and Lohuecosuchus , and suggested that both A. fontisensis and A. subjuniperus belong within the genus Allodaposuchus proper, which would render Agaresuchus as a junior synonym of Allodaposuchus. [3] The cladogram from Blanco's 2021 study is shown below: [3]
Allodaposuchidae |
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