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Likely/possible specimens of Tyrannosauroidea from the Southern Hemisphere (Jurassic-Early Late Cretaceous)
Joseph Fossil posted a topic in General Fossil Discussion
As a freshmen in College, I did a little extra credit report for my geology class about a controversial topic - Tyrannosauroidea diversity in the Southern Hemisphere during the Jurassic-Early Late Cretaceous periods. I was quite surprised at the amount of specimens I found. This diversity likely was the result of an early spread of the early tyrannosaur group Pantyrannosauria into Africa, Eurasia, and North America during the Jurassic and diversified once the land connecting these continents spread out more. Most of these species lived during the Early Cretaceous, though one or two exceptions might have lasted into the Early Late Cretaceous. I've created a list of known of the species and specimens which I would like to share on the forum (let me if there are any examples I'm missing or should add): South America Santanaraptor (Romualdo Member of the Santana Formation) (Early Albian, Cretaceous period 112.6-109.0 million years ago) Specimen: MN 4802-V (partial skeleton) http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=67712 Tyrannosauroidea indet. (Rio do Peixe Group of the Sousa Formation) (Berriasian to the Berriasian, Cretaceous period 145.5-130.0 million years ago) Specimen: NA http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=58791 https://www.researchgate.net/publication/309717524_As_localidades_com_rastros_fosseis_de_Tetrapodes_na_America_Latina Tyrannosauroidea indet. (Serra da Galga Member of Marília Formation) (Late Maastrichtian, Cretaceous Period, 70.0-66.0 million years ago) Specimen: CPP 449 (partial tooth) https://www.researchgate.net/publication/270524259_Theropod_teeth_from_the_Marilia_Formation_late_Maastrichtian_at_the_paleontological_site_of_Peiropolis_in_Minas_Gerais_State_Brazil (above paper initially described specimen, identification as possible Tyrannosauroidea in science direct paper) https://www.sciencedirect.com/science/article/abs/pii/S0031018220303151 Africa (Madagascar) Tyrannosauroidea indet. (Isalo Illb Formation) (Bathonian, Jurassic period 167.7-164.7 million years ago) Specimen: MSNM V5819 (partial tooth) http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=55391 https://www.researchgate.net/publication/257651210_First_description_of_theropod_remains_from_the_Middle_Jurassic_Bathonian_of_Madagascar Australia Timimus hermani (Otway Group of Eumeralla Formation) (Late Aptian, Cretaceous period 122.5-109.0 million years ago) Specimens: NMV P186303 (limb: left femur), NMV P186323 (limb: left femur of juvenile individual), QM F34621 (Pedal phalanx III-1) http://www.paleofile.com/Dinosaurs/Theropods/Timimus.asp http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=57099 Tyrannosauroidea indet. (Otway Group of Eumeralla Formation) (Late Aptian, Cretaceous period 110.0 million years ago) Specimen: NMV P186069 (Pubis bone) Possible Specimen: ?NMV P186046 (Pubis bone) https://www.researchgate.net/publication/42589187_A_Southern_Tyrant_Reptile https://www.sciencedaily.com/releases/2010/03/100325143045.htm- 8 replies
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On the night September 2, 2018, a large fire ripped through the prestigious National Museum of Brazil. By the time it was put out, a plethora of precious artifacts, including many dinosaurs fossils (with still many to this day missing). Of the specimens currently missing since the fire - the Holotype of a small theropod dinosaur from the Albian Cretaceous of Brazil's Santana Formation named Santanaraptor placidus. Santanaraptor (Romualdo Member of the Santana Formation) (Early Albian, Cretaceous period 112.6-109.0 million years ago) Specimen: MN 4802-V (partial skeleton with preserved soft tissue) http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=67712 What makes this dinosaur special is, according to recent studies from the 2010s, it is one of the only known Tyrannosauroidea dinosaurs from South America (along possibly with Mirischia). (Also, thanks @Troodon for letting me know about this phylogenetic chart) Source of info and chart: https://www.sciencedirect.com/science/article/abs/pii/S0031018218302566?via%3Dihub The paleontological significance of this specimen cannot be understated, but there is some hope the specimen survived the tragic fire (possibly in one of the museum's metal shelves). https://www.nature.com/articles/d41586-018-06192-9 It's been between 4 years since the fire and the specimen whereabouts are still unknown. Does anyone (ANYONE) know if the Santanaraptor specimen MN 4802-V survived the fire at the National Museum of Brazil and if the specimen is now safe?