Phuwiangvenator

Phuwiangvenator; Temporal range: Barremian,
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Clade:	†Megaraptora
Genus:	†Phuwiangvenator; Samathi et al., 2019[1]
Species:	†P. yaemniyomi
Binomial name
	†Phuwiangvenator yaemniyomi; Samathi et al., 2019[1]

Phuwiangvenator ("hunter of Phu Wiang") is a genus of 6 meter long megaraptoran theropod that lived during the Early Cretaceous period in what is now Thailand. It contains a single species, P. yaemniyomi, recovered from the Sao Khua Formation.[1]

Discovery and naming

The holotype was first found in 1993, before being named in 2019.[2] The holotype specimen consists of a partial skeleton consisting of a dorsal vertebra, three fused sacral vertebrae, right metacarpal II, right manual phalanges and unguals, right and left tibiae, left astragalocalcaneum, left metatarsal I, right metatarsals II–IV, right pedal phalanges and unguals, with a referred specimen including an atlantal intercentrum and right astragalocalcaneum which were found together. In the phylogenetic analyses it was found to be the basalmost megaraptoran.[1] Additional materials belonging to the holotype were described in 2021.[3]

Paleobiology

Paleopathology

The holotype specimen of Phuwiangvenator has a greenstick fracture to one metatarsal, caused by a traumatic event. The result of an injury that was caused by fighting, collision with a hard object or fall, the pathology occurred when the animal was an adolescent, and healed in a distorted form as the theropod matured.[4]

References

Samathi, A.; Chanthasit, P.; Martin Sander, P. (May 2019). "Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand". Acta Palaeontologica Polonica. 64 (2): 239–260. doi:10.4202/app.00540.2018.
"Mega-raptors were top predators in Thailand 100 million years ago". Plos. y Jon Tennant in Dinosaurs, Jon Tennant.
Samathi, Adun; Suteethorn, Suravech; Pradit, Nakorn; Suteethorn, Varavudh (2022-03-01). "New material of Phuwiangvenator yaemniyomi (Dinosauria: Theropoda) from the type locality: Implications for the early evolution of Megaraptora". Cretaceous Research. 131: 105093. doi:10.1016/j.cretres.2021.105093. ISSN 0195-6671.
Samathi, Adun; Weluwanarak, Jakkrapat; Duanyai, Punyawee; Kaikaew, Siripat; Suteethorn, Suravech (January 2023). "An unusual metatarsal of theropod dinosaur from the lower cretaceous of Thailand: the first detailed study of paleopathology in Megaraptora". Historical Biology. doi:10.1080/08912963.2023.2166833.

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[Samathietal2019-1] Samathi, A.; Chanthasit, P.; Martin Sander, P. (May 2019). "Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand". Acta Palaeontologica Polonica. 64 (2): 239–260. doi:10.4202/app.00540.2018.

[2] "Mega-raptors were top predators in Thailand 100 million years ago". Plos. y Jon Tennant in Dinosaurs, Jon Tennant.

[3] Samathi, Adun; Suteethorn, Suravech; Pradit, Nakorn; Suteethorn, Varavudh (2022-03-01). "New material of Phuwiangvenator yaemniyomi (Dinosauria: Theropoda) from the type locality: Implications for the early evolution of Megaraptora". Cretaceous Research. 131: 105093. doi:10.1016/j.cretres.2021.105093. ISSN 0195-6671.

[4] Samathi, Adun; Weluwanarak, Jakkrapat; Duanyai, Punyawee; Kaikaew, Siripat; Suteethorn, Suravech (January 2023). "An unusual metatarsal of theropod dinosaur from the lower cretaceous of Thailand: the first detailed study of paleopathology in Megaraptora". Historical Biology. doi:10.1080/08912963.2023.2166833.