Three fossilized lungfish tooth plates.
A group of Permian lungfish tooth plates from the Wellington Formation in Waurika, Jefferson County, Oklahoma, USA. I'm not sure what genus these belong to, but they seem closer to the younger aged Ceratodus than to things like Gnathorhiza. #FossilFriday
#fish #lungfish #fossil #paleontology
Magnified view of the mesial carinae or cutting edge a fossilized dinosaur tooth of an unknown theropod showing a twist of the cutting edge.
The tooth features a notable twist of the mesial carinae which is unusual for theropods in this region. While associated and commonly seen in coelurosaurs, noasaurids I believe can also have this condition. These are occasionally seen amongst common abelisaurids and young carcharodontosaurid teeth.
Fossilized dinosaur tooth of an unknown theropod inside of a gem jar.
A dinosaur tooth of an indeterminate theropod, possibly a coelurosaur from the Kem Kem Group in Morocco. It's hard to say what this tooth belongs to. Megaraptorans are a possibility, as are dromaeosaurids and basal coelurosaurs. #FossilFriday
#dinosaur #fossil #paleontology #theropod
The pinched cross-section of a fossilized dinosaur tooth of an unknown tyrannosaur showing an hourglass or figure eight shape.
The tooth has distinct hourglass-shaped cross-section commonly seen in Nanotyrannus which may indicate that it actually came from the Hell Creek or Lance Formation. Or, it could be an undescribed Campanian nanotyrannid. It could also just be Gorgosaurus, possibly even some kind of teratophonein.
Fossilized dinosaur tooth of an unknown tyrannosaur showing much of the enamel worn away.
A worn dinosaur tooth of an indeterminate tyrannosaur, supposedly from the Judith River Formation in Montana, USA. Unfortunately, the provenance for this tooth is absent other than Northern Montana. #FossilFriday
#dinosaur #fossil #paleontology #gorgosaurus #daspletosaurus #tyrannosaurid #theropod
Fossilized dinosaur tooth of an Afrovenator showing showing fractured enamel.
A dinosaur tooth of a cf. Afrovenator abakensis from the Irhazer Group in Marandet, Aderbissinat, Agadez, Niger. The cookies 'n cream colors can be quite pretty, albeit, the tooth is still fractured like most. #FossilFriday
#dinosaur #fossil #paleontology #afrovenator #megalosaurid #theropod
Magnified view of the serrations or denticles of a fossilized dinosaur tooth of an unknown tyrannosaur.
A magnified view of the serrations or denticles. I'm not sure if the weakly developed serrations of the premax teeth point towards a more basal taxon like the albertosaurine Gorgosaurus, assuming the more derived tyrannosaurines like Daspletosaurus are more developed like in Tarbosaurus.
Fossilized dinosaur tooth of an unknown tyrannosaur showing significant feeding wear towards the tip.
A dinosaur tooth of an indeterminate tyrannosaurid from the Judith River Formation in Valley County, Montana, USA. The serrations are oddly weakly developed, though it's unclear what that implies. #FossilFriday
#dinosaur #fossil #paleontology #gorgosaurus #daspletosaurus #tyrannosaurid #theropod
A pair of fossilized fish head shield of a Bothriolepis on original matrix or rock.
A fossilized partial placoderm head shield from a Bothriolepis canadensis from the Escuminac Formation in Escuminac Bay, Quebec, Canada. Bothriolepis was a highly prolific Devonian aged genus of armored fish found across the world. #FossilFriday
#fish #placoderm #fossil #paleontology #bothriolepis
Fossilized partial mammal teeth of two giant beaver or Castoroides.
A pair of fragmentary fossilized teeth of a giant beaver or Castoroides dilophidus from Columbia County, Florida, USA. This extinct beaver genus lived alongside American beavers that are still around today. #FossilFriday
#synapsid #mammal #fossil #paleontology #castoroides #beaver #rodent
Are you referring to the procumbent premaxillary teeth? Saitta and Longrich 2024 do point that out as an autapomorphy of Nanotyrannus not see in any other tyrannosauroid. However, Napoli did state he did not find it a convincing character in the livestream he did on their Skeleton Crew channel.
Three fossilized unknown crocodylomorph teeth inside of a gem jar.
Three indeterminate crocodylomorph teeth from the Csehbánya Formation in Veszprém County, Hungary. The teeth possibly belong to either cf. Allodaposuchus sp. or cf. Theriosuchus sp. #FossilFriday
#crocodylomorph #fossil #paleontology #allodaposuchus #theriosuchus
Fossilized torpedo-shaped dinosaur tooth of an unknown sauropod showing heavy wear towards the tip.
A dinosaur tooth of an indeterminate sauropod, likely a titanosauriform from the Irhazer Group in the Agadez Region of Niger. I'm not entirely sure what it is, but the robust torpedo shaped morphology would suggest a macronarian of some kind. #FossilFriday
#dinosaur #fossil #paleontology #sauropod
While the two main tyrannosaurids described from this deposit are Gorgosaurus and Daspletosaurus, there may potentially be a Teratophoneini indet. and Tyrannosaurini indet. (cf. Tyrannosaurus sp.) also present in the Two Medicine Formation.
Fossilized dinosaur tooth of an unknown tyrannosaur showing the tooth tip broken off and enamel worn down with some restoration between the cracks.
A partial dinosaur tooth of an indeterminate tyrannosaurid from the Two Medicine Formation in Pondera County, Montana, United States. Unfortunately, the mesial carinae is completely worn down. #FossilFriday
#dinosaur #fossil #paleontology #gorgosaurus #daspletosaurus #tyrannosaurid #theropod
The recent description of Xenovenator espinosai by Rivera-Sylva et al. suggests Albertavenator is a derived close relative, forming the clade Troodontini with the Troodon-type troodontids. So it is probably likely that Albertavenator did have these classic cf. Troodon teeth.
www.mdpi.com/3674690
Fossilized lungfish of a Dipterus on original matrix or rock.
A fossilized lungfish of a Dipterus valenciennesi from the Achanarras Limestone Member, Old Red Sandstone at the Achanarras Quarry in Caithness, Scotland. These basal lungfish are found in various Devonian-aged deposits in Europe. #FossilFriday
#fish #lungfish #fossil #paleontology #dipterus
Fossilized bird jaw of a Dasornis on original matrix or rock showing tooth-like protrusions on the beak.
A fossilized bird jaw of a Dasornis sp. from Oued Zem, Khouribga, Morocco. Pelagornithids like the Eocene aged Dasornis are known as false-toothed or pseudotooth birds for their serrated beaks. #FossilFriday
#dinosaur #bird #fossil #paleontology #dasornis #theropod
Close up view of a fossilized fish of an Osteolepis on original matrix or rock showing the skull.
A close up view of the skull. More often, many of the fish specimens from Caithness are just a disarticulated mess of scales, so a fairly complete specimen is quite uncommon.
Fossilized fish of an Osteolepis on original matrix or rock.
A fossilized lobe-finned fish of an Osteolepis panderi from the Old Red Sandstone near Skinnet Farm, Hill of Forrs, Thurso, Caithness, Scotland. Osteolepidids are more closely related to tetrapods and lungfish than to ray-finned fish. #FossilFriday
#fish #fossil #paleontology #osteolepis
Close up view of a fossilized Arthropleura on original rock or matrix.
A close up view of an armor section. Most material found from this famous extinct millipede is in the form of these isolated, but distinct, armor pieces.
Fossilized Arthropleura on original rock or matrix showing a Zeilleria fern nearby.
A fossilized armored millipede segment of an Arthropleura sp. from the Orzeskie Beds, Upper Silesia Coal Basin, Poland. These giant Carboniferous aged myriapods grew over two meters. The fern genus Zeilleria can also be seen on the slab. #FossilFriday
#myriapod #fossil #paleontology #arthropleura
Magnified view of a fossilized dinosaur tooth of a Saurornitholestes or Bambiraptor showing hook-shaped serrations or denticles.
A magnified view of the serrations. The hook-shaped denticles on the distal carinae is a distinct characteristic that distinguishes these saurornitholestines from the contemporary dromaeosaurid, Dromaeosaurus albertensis, as well as young tyrannosaurs individuals of Gorgosaurus or Daspletosaurus.
Fossilized dinosaur tooth of a Saurornitholestes or Bambiraptor inside of a gem jar.
A dinosaur tooth of an indeterminate saurornitholestine dromaeosaurid, possibly Saurornitholestes langstoni or Bambiraptor feinbergi from the Judith River Formation in Fergus County, Montana, USA. #FossilFriday
#dinosaur #fossil #paleontology #saurornitholestes #bambiraptor #dromaeosaurid #theropod
Fossilized mosasaur tooth of a Thalassotitan or Prognathodon showing the tip worn down.
A mosasaur tooth of an indeterminate prognathodontin, possibly cf. Thalassotitan sp. from the Peedee Formation in Holden Beach, North Carolina, USA. This robust tooth morph is comparable to Thalassotitan atrox from Morocco. #FossilFriday
#mosasaur #fossil #paleontology #thalassotitan #prognathodon
Magnified view of a fossilized crocodylomorph tooth of a Doratodon on original matrix or rock showing serrations or denticles on the cutting edge or carinae.
Magnified view of a fossilized crocodylomorph tooth of a Doratodon on original matrix or rock showing serrations or denticles on the cutting edge or carinae.
A magnified view of the crown showing the worn, but present serrations on the carinae. While we don't have any today, land crocs seem to show up independently, and quite frequently, throughout crocodylomorph evolution.
Fossilized crocodylomorph tooth of a Doratodon on original matrix or rock.
A fossilized crocodylomorph tooth of an Doratodon carcharidens from the Csehbánya Formation in Veszprém County, Hungary. This Cretaceous aged terrestrial ziphosuchian croc had serrated teeth similar to those of theropod dinosaurs. #FossilFriday
#crocodylomorph #fossil #paleontology #doratodon
In hindsight, this could have gone very poorly. So uh, always have a friend to help carry heavy objects. If sci-fi multiverse, alternate timeline stuff or whatever is real, then I'm sure there are instances where I did get fatally crushed by the Eubrontes after tumbling down stairs.
A minor correction, apparently this slab of rock is around 78 pounds according to the UPS label. That's what I thought as first, but assumed it was lighter once I managed to carry it up the stairs, but I guess I can carry close to 80 pounds. I only weigh a bit over 100 pounds, so that's surprising.
Dinosaur footprint or track of an Eubrontes, Gigandipus, or Dilophosaurus on original matrix or rock showing added staining to show clarity and a human hand for comparison.
This 11-12 inch Eubrontes weights about 50-60 pounds which made it quite dangerous to carry up stairs. Eubrontes and other similar morphologies have sometimes been attributed to basal sauropodomorphs as well, but they are generally assumed to be Dilophosaurus-sized theropods in affinity.