An early diverging crocodylid from the Middle Miocene of Thailand highlights the role of SE Asia for the radiation of the Crocodyloidea - Archive ouverte HAL
Article Dans Une Revue Historical Biology Année : 2023

An early diverging crocodylid from the Middle Miocene of Thailand highlights the role of SE Asia for the radiation of the Crocodyloidea

Wilailuck Naksri
  • Fonction : Auteur
Komsorn Lauprasert
  • Fonction : Auteur
Kamonlak Wongko
  • Fonction : Auteur
Sujintana Chompusri
  • Fonction : Auteur
Saitong Sila
  • Fonction : Auteur
Julien Claude
  • Fonction : Auteur

Résumé

The Neogene period witnessed the radiation of modern crocodylian genera, as evidenced from their fossil record in intertropical zones. Despite its recognition as a modern biodiversity hotspot, South East Asia remains undersampled for that age bin. Here, we describe a new crocodylian from northern Thailand, Antecrocodylus chiangmuanensis n. gen. n. sp. from the Middle Miocene lignite seams of Chiang Muan and refer to it other specimens from the nearby lignite seams of Mae Moh. The holotype specimen preserves the posterior half of the skull and mandible. Anatomical observations are aided by medical computed tomography. A phylogenetic analysis places the new taxon in a basal position relative to Crocodylidae. This discovery highlights the underrated fossil record of Neogene crocodyloids in Asia compared to Africa or Australia and allows us to reconsider palaeobiogeographic relationships between supposed endemic clades.

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Dates et versions

hal-04741215 , version 1 (17-10-2024)

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Jeremy E Martin, Wilailuck Naksri, Komsorn Lauprasert, Kamonlak Wongko, Sujintana Chompusri, et al.. An early diverging crocodylid from the Middle Miocene of Thailand highlights the role of SE Asia for the radiation of the Crocodyloidea. Historical Biology, 2023, pp.1 - 10. ⟨10.1080/08912963.2023.2278152⟩. ⟨hal-04741215⟩
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