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Kerry Sieh, Dayana Schonwalder Angel, Jason Herrin, and Jia Yong Quah, 2023. Proximal ejecta of the Bolaven extraterrestrial impact, southern Laos Proceedings of the National Academy of Sciences. 120 (50) e2310351120 https://doi.org/10.1073/pnas.2310351120 Yours, Paul H.

Was there a different Carcharodontosaurus in Laos than Siamraptor? Please let me know. Thank you in advance.

Is this the tooth of the Carcharodontosaurus in Laos? Also, does this tooth color match the color of the material from Laos? Please let me know. Thank you in advance.

Hello. Are these teeth from a new species of Spinosaurus? Origin: Laos Gress Superieur Formation Below is information from the vendor. Ichthyobenator has been found, but "this tooth has the typical striated enamel, but is longer and thinner than a typical Ichthyobenator tooth." If anyone knows, please let me know. Thanks in advance.

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

Hi! I have a tooth from the Gres Superieurs formation of Laos and I'm struggling with the ID. The person I acquired the tooth from suggested it was an undescribed spinosaurid - possibly Baryonychinae - due to the striations in the enamel. I'm not sure though, so I was hoping someone with more knowledge of teeth from Loas might be able to help me out. My first thoughts upon seeing the tooth were that it was likely to be a Pterosaur or fish tooth. It's certainly not Ichthyovenator as it's far too narrow. It's 0.88 inches long. Thanks in advance for any help! IMG_6481.HEIC IMG_6482.HEIC IMG_6483.HEIC

Hello, Now this is a partial, but I am hopeful someone can recognise it. It is supposedly carcharodontosaurid from Laos. I am guessing that could make it Siamraptor, since Gres Superiors has the same species as the Khok Kruat. Unfortunately, a partial tooth. And no serrations on mesial, which I guess hinders the identification. But I am hoping the base and what remains may be enough? Or would labelling it as "unidentified theropod" more more appropriate than carcharodontosaurid? Thanks

Hello, Thoughts on this? Associated and connected sacrum verts from Laos - Gres superieurs. 5 inch long. Seller id'd it as a ornithomimid, but was told it could be other theropod. That formation just has a handful of species described. No ornithomimids. But is anyone able to take a look and shed some light. Ornithomimid, raptor, even juvenile ichthyovenator etc. If ornithomimid, it would be an entirely new species? With none described from there or the equivalent Khok Kruat Formation?

Ancient tooth suggests Denisovans ventured far beyond Siberia Molar found in Laos could be the first fossil evidence that the hominin species was far-ranging and able to adapt to different climates. Freda Kreier, Nature News, May 17, 2022 The Open Access paper is: Demeter, F., Zanolli, C., Westaway, K.E., Joannes-Boyau, R., Duringer, P., Morley, M.W., Welker, F., Rüther, P.L., Skinner,; M.M., McColl, H. and Gaunitz, C., 2022. A Middle Pleistocene Denisovan molar from the Annamite Chain of northern Laos. Nature Communications, 13(1), pp.1-17. Your, Paul H.

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

Isotope analysis of nitrogen and other isotopes helps understand real paleo diets, but now we can use zinc isotopes. https://m.phys.org/news/2020-02-reconstructing-diets-fossil-vertebrates.html

I got one of these tektites almost 20 years ago in Vietnam and have been intrigued by the mystery of this 800,000 year old impact event since. This type of tektites has been found in Antarctica, Australia, and Asia. Now scientists may have found the impact crater hiding under large Laotian lava lake. https://astronomy.com/news/2020/01/crater-found-from-asteroid-that-covered-10-of-earths-surface-in-debris

Laos / Cave fossils shed light on the world of 80,000 years ago By: Uffe Wilken, Sotheast Asia Globe, January 10, 2019 https://sea-globe.com/lao-cave-fossils/ Tam Pa Ling Cave - https://en.wikipedia.org/wiki/Tam_Pa_Ling_Cave A couple of papers: Pierret, A., Zeitoun, V. and Forestier, H., 2012. Irreconcilable differences between stratigraphy and direct dating cast doubts upon the status of Tam Pa Ling fossil. Proceedings of the National Academy of Sciences, 109(51), pp.E3523-E3523. https://www.pnas.org/content/109/51/E3523.short Shackelford, L., Demeter, F., Westaway, K., Duringer, P., Ponche, J.L., Sayavongkhamdy, T., Zhao, J.X., Barnes, L., Boyon, M., Sichanthongtip, P. and Sénégas, F., 2018. Additional evidence for early modern human morphological diversity in Southeast Asia at Tam Pa Ling, Laos. Quaternary International, 466, pp.93-106. https://www.researchgate.net/publication/314164578_Additional_evidence_for_early_modern_human_morphological_diversity_in_Southeast_Asia_at_Tam_Pa_Ling_Laos https://www.researchgate.net/publication/320628876_Early_Modern_Humans_from_Tam_Pa_Ling_Laos_Fossil_Review_and_Perspectives https://www.researchgate.net/profile/Fabrice_Demeter Yours, Paul H.