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Found 3 results

  1. I see more and more material being made available from Laos especially Spinosauridae teeth and members asking about them. I'm not an expert from this locality just trying to pull together published information to help collectors on both Thailand and Laos teeth. Its never simple . Locality is very important in identification, so you really need to know the specific area where the teeth were found. Just Laos or Thailand is not acceptable Lets look at Localities and formations Nice image from the paper that described a Garfish that shows both Thailand and Laos localities (Cavin 2019) Northeastern Thailand Khok Krut Formation: Morph type 1 : Spinosaurid indet Morph type II : cf Simosaurus suteethorni (Manitkoon et al 2022) The teeth of Khok Kruat spinosaurids (see below figure) can be categorized into two sub-morphotypes (Wongko et al. 2019), both found in the Khok Pha Suam locality. Sub-morphotype I (Fig. 3p) presents a smooth enamel surface of the crown and possesses more than 20 fine ridges on each side. Sub-morphotype II (Fig. 3q) shows a wrinkled enamel surface of the crown and no more than 16 coarse ridges on each side, which is similar to Siamosaurus suteethorni from the Sao Khua Formation Morph Types figure 3 From (Wongo et al 2019) Sao Khua Formation: A: Siamosaurus suteethorni tooth (Sao Khua Fm) B: Indet Spinosaurid (Khok Kruat Fm) Summary of known teeth from different areas ( Wongo et al 2019 ) Laos: The Gres superieurs Formation: -From Savannakhet basin -Ichthyovenator laosensis is considered a Spinosaurinae (Allain et al 2014) -No teeth were found with the Holotype of Ichthyovenator so they were not described as part of that publication -The Grès Supérieurs Formation of southern Laos is laterally considered an equivalent to the Khok Kruat Formation. (Manitkoon et al 2022) -KEY: Morph type I from above considered Ichthyovenator laosensis (Manitkoon et al 2022) References: -Spinosaurid theropod teeth from the Red Beds of the Khok Kruat Formation (Early Cretaceous) in Northeastern Thailand , Kamonlak Wongo, Eric Buffetaut, Suchada Khamha and Komsorn Lauprasert 2019 -The first definitive Asian spinosaurid (Dinosauria: Theropoda) from the early cretaceous of Laos Ronan Allain & Tiengkham Xaisanavong & Philippe Richir & Bounsou Khentavong 2012 -Fossil assemblage from the Khok Pha Suam locality of northeastern, Thailand: an overview of vertebrate diversity from the Early Cretaceous Khok Kruat Formation (Aptian-Albian) , Sita Manitkoon, Uthumporn Deesri, Komsorn Lauprasert, Prapasiri Warapeang, Thanit Nonsrirach, Apirut Nilpanapan, Kamonlak Wongko, Phornphen Chanthasit 2022 -A spinosaurid from Thailand (Sao Khua Formation, Early Cretaceous) and a reassessment of Camarillasaurus cirugedae from the Early Cretaceous of Spain, Adun Samathi , P. Martin Sander & Phornphen Chanthasit 2021 -Cavin, L.; Deesri, U.; Veran, M.; Khentavong, B.; Jintasakul, P.; Chanthasit, P.; Allain, R. (2019). "A new Lepisosteiformes (Actinopterygii: Ginglymodi) from the Early Cretaceous of Laos and Thailand, SE Asia". Journal of Systematic Palaeontology. 17 (5): 393–407. doi:10.1080/14772019.2018.1426060 -A Catalogue of Material and Review of the Spinosauridae Tor Bertin 2010 -Allain, Ronan (2014). "New material of the theropod Ichthyovenator from Ban Kalum type locality (Laos): Implications for the synonymy of Spinosaurus and Sigilmassasaurus and the phylogeny of Spinosauridae". Journal of Vertebrate Paleontology Programs and Abstracts. 74: 78 @Guns
  2. Here are two recent publications that provide additional information of Thailand's Dinosaur Fauna This paper describes the fossil assemblage from the Khok Pha Suam locality of northeastern, Thailand from the Early Cretaceous Khok Kruat Formation (Aptian-Albian). We currently see material coming out of this region including Laos so it can be beneficial to those that collect this region https://fr.pensoft.net/article/83081/ The presence of multiple Spinosaurids in the Sao Khua Formation is discussed. Article https://www.uni-bonn.de/en/news/078-2021 Paper https://www.researchgate.net/publication/349291782_A_spinosaurid_from_Thailand_Sao_Khua_Formation_Early_Cretaceous_and_a_reassessment_of_Camarillasaurus_cirugedae_from_the_Early_Cretaceous_of_Spain
  3. Siamraptor suwati a new Carcharodontosaurian, a first from Southeast Asia, from the lower Cretaceous of Thailand, is described in the attached paper National Geographic press release https://www.nationalgeographic.com/science/2019/10/huge-new-shark-toothed-dinosaur-siamraptor-found-in-thailand/ Cosmos Press release https://cosmosmagazine.com/palaeontology/early-cretaceous-predator-discovered-in-thailand Smithsonian Press release https://www.smithsonianmag.com/science-nature/newly-discovered-dinosaur-was-giant-shark-tooth-predator-rival-tyrannosaurs-180973304/ Paper https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0222489
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