Protathlitis
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Through Basal (phylogenetics) and Phylogenetics
Discovery and naming
The holotype remains, the maxillary fragment 8ANA-109 and caudal vertebrae 3ANA83, 4ANA43, 4ANA69, 4ANA76, and 5ANA78, were recovered from the ANA site of the Arcillas de Morella Formation, which was discovered in 1998 and remained unexplored until 2002. A tooth, 4ANA-11, possibly from the left mandible or right maxilla, was also referred.
The remains were described as a new genus and species of spinosaurid in 2023, Protathlitis cinctorrensis. The genus name, "Protathlitis", is Greek for "champion", and is dedicated to the 2020–21 UEFA Europa League won by Villareal C.F. and in light of the club's centenary in 2023. The specific name, "cinctorrensis", honors Cinctorres, the town where the remains were discovered.
In 2024, Montealegre, Castillo-Visa & Sellés tentatively assigned specimen IPS919, a nearly complete tooth including a partial root from the Arcillas de Morella Formation, to cf. Protathlitis.
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Classification
Santos-Cubedo et al. (2023) performed a phylogenetic analysis, placing Protathlitis as the basalmost member the Baryonychinae. Their results are shown in the cladogram below:
Palaeoenvironment
Protathlitis hails from the Arcillas de Morella Formation, which has been dated to the Barremian stage of the Early Cretaceous period, between 129.4 and 125 million years ago. It coexisted in this environment with other dinosaurs including the ornithischians Iguanodon bernissartensis and Morelladon beltrani, an indeterminate sauropod, and the fellow spinosaurid Vallibonavenatrix.