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mesozoic.bsky.social
Mesozoic Market | Fossil Collector & Amateur Paleontology
@mesozoic.bsky.social
440 followers 580 following 480 posts
Fossil collector & amateur / hobby paleontology of dinosaurs & other prehistoric fauna. Not a certified paleontologist. 化石コレクター
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Specimens shown are primarily for show & NOT for sale or trade.
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Some excess fossils for sale @ https://mesozoicmarket.com
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mesozoic.bsky.social
Mesozoic Market | Fossil Collector & Amateur Paleontology @mesozoic.bsky.social · Jun 28
A dinosaur tooth of an indeterminate carcharodontosaurid from the Grès supérieurs Formation in the Savannakhet Province of Laos. Possibly cf. Siamraptor suwati, but the size and morphology seems more derived. #FossilFriday

#dinosaur #fossil #paleontology #siamraptor #carcharodontosaurid #theropod
Fossilized dinosaur tooth of an unknown carcharodontosaurid or a Siamraptor.
mesozoic.bsky.social
A fossilized crocodylomorph tooth of an Iharkutosuchus makadii from the Csehbánya Formation in Veszprém County, Hungary. Unlike the leaf-shaped teeth of herbivorous crocs like Simosuchus, this genus evolved mammal-like dentition. #FossilFriday

#crocodylomorph #fossil #paleontology #iharkutosuchus
Fossilized crocodylomorph tooth of a Iharkutosuchus inside of a gem jar showing feeding wear on the crown.
November 7, 2025 at 8:11 PM
mesozoic.bsky.social
A rooted dinosaur tooth of a Nanotyrannus sp. from the Hell Creek Formation in Carter County, Montana, USA. This unserrated basal morphology was previously known as the tooth taxon, Aublysodon amplus. #FossilFriday

#dinosaur #fossil #paleontology #aublysodon #nanotyrannus #tyrannosaurid #theropod
Fossilized dinosaur tooth of a Nanotyrannus or Aublysodon showing all of the root in tact and lacking serrations on the cutting edge.
October 31, 2025 at 3:32 PM
mesozoic.bsky.social
A dinosaur tooth of a Nanotyrannus sp. from the Hell Creek Formation in Carter County, Montana, USA. This nanotyrannid eutyrannosaur has two species, N. lancensis and N. lethaeus. Welcome back Nanotyrannus. For good this time.

#dinosaur #fossil #paleontology #nanotyrannus #tyrannosaurid #theropod
Fossilized dinosaur tooth of a Nanotyrannus inside of a gem jar.
October 30, 2025 at 4:47 PM
mesozoic.bsky.social
A dinosaur tooth of an ankylosaur, either Hungarosaurus tormai or cf. Struthiosaurus sp. from the Csehbánya Formation in Veszprém County, Hungary. Hungarosaurus is known for its long forelimbs. #FossilFriday

#dinosaur #fossil #paleontology #hungarosaurus #struthiosaurus #ankylosaur #ornithischian
Fossilized leaf-shaped dinosaur tooth of a Hungarosaurus inside of a gem jar showing some feeding wear.
October 24, 2025 at 7:43 PM
mesozoic.bsky.social
A partial fossilized metatarsal of a theropod, possibly Dzharacursor bissektensis from the Bissekty Formation in Dzharakuduk, Kyzylkum Desert, Uzbekistan. This species was previously referred to Archaeornithomimus. #FossilFriday

#dinosaur #fossil #paleontology #dzharacursor #ornithomimid #theropod
Partial fossilized dinosaur metatarsal of a Dzharacursor.
October 17, 2025 at 9:40 PM
mesozoic.bsky.social
A fossilized osteoderm from a Cretaceous aged softshelled turtle, possibly Khunnuchelys kizylkumensis from the Bissekty Formation in Dzharakuduk, Kyzylkum Desert, Uzbekistan. Other species of this genus also occur in China and Kazakhstan. #FossilFriday

#turtle #fossil #paleontology #khunnuchelys
Fossilized softshelled turtle osteoderm or scute of a Khunnuchelys.
October 10, 2025 at 7:01 PM
mesozoic.bsky.social
Today is the 120th anniversary of the description of #Tyrannosaurus rex and #Albertosaurus sarcophagus in 1905 by Henry Fairfield Osborn, the two species that would define the clade, Tyrannosauridae. A pair of dinosaur teeth, albeit very worn, belonging to these two famous species. 🧪
Pair of fossilized dinosaur teeth of a Tyrannosaurus and Albertosaurus showing both showing the tip missing.
October 4, 2025 at 6:35 PM
mesozoic.bsky.social
A partial dinosaur tooth of an indeterminate theropod from the Lourinhã Formation in Peniche, Portugal. It's hard to say what it is given its incomplete nature, but it's possibly either Allosaurus europaeus or a non-Torvosaurus megalosauroid. #FossilFriday

#dinosaur #fossil #paleontology #theropod
Fossilized dinosaur tooth of an unknown theropod showing the top half of the tooth crown missing.
October 3, 2025 at 2:59 PM
mesozoic.bsky.social
A rooted dinosaur tooth of an indeterminate pachycephalosaurid from the Hell Creek Formation in Carter County, Montana, USA. Genera include, Pachycephalosaurus, Platytholus, Sphaerotholus, and the controversial Stygimoloch and Dracorex. #FossilFriday

#dinosaur #fossil #paleontology #ornithischian
Fossilized dinosaur tooth of an unknown pachycephalosaurid with the root still preserved showing a raised ridge down the center of the crown.
September 26, 2025 at 2:25 PM
mesozoic.bsky.social
A fossilized crocodilian tooth of a Deinosuchus riogragndensis from the Aguja Formation in Brewster County, Texas, USA. There were multiple species of these giant crocs during the Campanian of North America. #FossilFriday

#crocodylomorph #crocodilian #fossil #paleontology #deinosuchus
Fossilized crocodylomorph tooth of a Deinosuchus showing prominent ridges running down the tooth enamel.
September 19, 2025 at 6:56 PM
mesozoic.bsky.social
A dinosaur tooth of an indeterminate hadrosaur, possibly Aquilarhinus palimentus from the Aguja Formation in Brewster County, Texas, USA. Aquilarhinus was previous referred to Kritosaurus and Gryposaurus. #FossilFriday

#dinosaur #fossil #paleontology #aquilarhinus #ornithopod #ornithischian
Fossilized dinosaur tooth of an Aquilarhinus or Kritosaurus inside of a gem jar showing pronounced serrations along the cutting edge.
September 12, 2025 at 5:56 PM
mesozoic.bsky.social
A fossilized crocodilian osteoderm of a Miocene aged Alligator sp. from the Fleming Formation near Point Blank, San Jacinto County, Texas, USA. Based on the age, the species could potentially Alligator mefferdi. #FossilFriday

#crocodylomorph #crocodilian #fossil #paleontology #alligator
Fossilized crocodylomorph osteoderm or scute of an Alligator (genus).
September 5, 2025 at 4:49 PM
mesozoic.bsky.social
A partial mosasaur jaw, likely Tylosaurus cf. proriger from the Ozan Formation in Northern Texas, USA. This good sized jaw section has a single nice replacement tooth still preserved. A large number of mosasaurs here appear to be Tylosaurus. #FossilFriday

#mosasaur #fossil #paleontology #tylosaurus
Fossilized mosasaur jaw section of a Tylosaurus with one replacement teeth still preserved.
August 29, 2025 at 4:15 PM
mesozoic.bsky.social
A fossilized crocodilian tooth of a Brachychampsa montana from the Hell Creek Formation in Baker, Fallon County, Montana, USA. These extinct alligatorids are know for their bulbous or button-like teeth. #FossilFriday

#crocodylomorph #crocodilian #fossil #paleontology #brachychampsa
Fossilized button-like crocodylomorph tooth of a Brachychampsa showing some feeding wear.
August 22, 2025 at 6:51 PM
mesozoic.bsky.social
A trilobite fossil of a cf. Nileus sp. from the Pupiao Formation in Yunnan, China. The species of this undescribed Ordovician aged trilobite is unclear, but these are commonly labeled as Nileus transversus or N. transversis by collectors. #FossilFriday

#trilobite #fossil #paleontology #nileus
Fossilized trilobite of a Nileus on original rock or matrix showing part of the pygidium or tail section missing.
August 15, 2025 at 6:02 PM
mesozoic.bsky.social
A dinosaur tooth of an indeterminate tyrannosaurid from the Judith River Formation in Havre, Hill County, Montana, USA. Most isolated teeth of Daspletosaurus and Gorgosaurus are indistinguishable. #FossilFriday

#dinosaur #fossil #paleontology #gorgosaurus #daspletosaurus #tyrannosaurid #theropod
Fossilized dinosaur tooth of either Daspletosaurus or Gorgosaurus.
August 8, 2025 at 6:18 PM
mesozoic.bsky.social
A fossilized shark tooth of an Otodus megalodon from New Caledonia. Teeth from this locale are dredged from the bottom of the Pacific Ocean and are often extremely worn. This tooth still retains some remnants of its serrations. #FossilFriday

#shark #fossil #paleontology #otodus #carcharocles
Fossilized shark tooth of an Otodus or Carcharocles showing significant wear and some modern barnacles attached.
August 1, 2025 at 3:41 PM
mesozoic.bsky.social
A dinosaur tooth of an ankylosaur, possibly Denversaurus schlessmani from the Hell Creek Formation in Baker, Fallon County, Montana, USA. Not being well versed, the bulbous base could also suggest Ankylosaurus. #FossilFriday

#dinosaur #fossil #paleontology #denversaurus #ankylosaur #ornithischian
Fossilized leaf-shaped dinosaur tooth of a Denversaurus inside of a gem jar showing the tip of the tooth worn away.
July 25, 2025 at 9:07 PM
mesozoic.bsky.social
A dinosaur tooth of an indeterminate theropod, possibly Tyrannosaurus rex from the Hell Creek Formation in Harding County, South Dakota, USA. The oval cross-section suggests T. rex, but it could be something else. #FossilFriday

#dinosaur #fossil #paleontology #tyrannosaurus #tyrannosaurid #theropod
Fossilized dinosaur tooth of either an unknown theropod, possibly Tyrannosaurus.
July 18, 2025 at 5:56 PM
mesozoic.bsky.social
A fossilized tooth, possibly a squalodontid or Squalodon sp. from the Bone Valley Member, Peace River Formation in the phosphate mines of Florida, USA. These oddly toothed cetaceans are also known as shark-toothed dolphins. #FossilFriday

#synapsid #mammal #fossil #paleontology #squalodon #cetacean
Fossilized mammal tooth of a Squalodon or shark-toothed dolphin.
July 11, 2025 at 6:15 PM
mesozoic.bsky.social
A partial dinosaur tooth of an indeterminate sauropod, possibly macronarian from the Lourinhã Formation in Lourinhã, Portugal. Like the Morrison Formation, this deposit has many sauropods such as Lusotitan, Oceanotitan, and Lourinhasaurus. #FossilFriday

#dinosaur #fossil #paleontology #sauropod
Fossilized dinosaur tooth of an unknown sauropod with part of the root still preserved showing some of the tip missing.
July 4, 2025 at 10:39 PM
mesozoic.bsky.social
A dinosaur tooth of an indeterminate carcharodontosaurid from the Kem Kem Group in Morocco. Carcharodontosaurus and the basal (possibly undiagnostic) Sauroniops may be indistinguishable. #FossilFriday

#dinosaur #fossil #paleontology #carcharodontosaurus #sauroniops #carcharodontosaurid #theropod
Fossilized dinosaur tooth of a Carcharodontosaurus or Sauroniops showing a section of the tip missing.
June 27, 2025 at 4:10 PM
mesozoic.bsky.social
A fossilized fish tooth of an Enchodus petrosus from the Taylor Group in the South Sulphur River of Texas, USA. This commonly found extinct genus is sometimes called the "saber-toothed herring", though it is not actually related to true herring. #FossilFriday

#fish #fossil #paleontology #enchodus
Fossilized fish jaw section of an Enchodus with one fang-like tooth still preserved.
June 20, 2025 at 12:49 PM
mesozoic.bsky.social
A very worn dinosaur tooth of an indeterminate theropod, possibly Ceratosaurus sp. from the Lourinhã Formation in Lourinhã, Portugal. The teeth of Ceratosaurus can be quite compressed as seen in this specimen. #FossilFriday

#dinosaur #fossil #paleontology #ceratosaurus #ceratosaurid #theropod
Fossilized dinosaur tooth of an unknown theropod, possibly Ceratosaurus showing most of its features weathered away.
June 13, 2025 at 4:50 PM
mesozoic.bsky.social
A pair of indeterminate crocodylomorph teeth, possibly alligatoroid from the Aquia Formation in Belvedere, King George County, Virginia, USA. This Paleocene aged deposit produces a number of crocodylomorph genera. #FossilFriday

#crocodylomorph #crocodilian #fossil #paleontology
Pair of fossilized crocodylomorph teeth of an unknown alligatoroid showing multiple ridges running down the crown.
June 6, 2025 at 6:36 PM