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Showing results for tags 'juvenile tyrannosaur'.
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"That some of these teeth are mammalian incisors there can be but little doubt..." - O. C. Marsh1 This kind of incisor-like ("incisiform") tooth was originally thought to have belonged to a large, Cretaceous mammal. Later discoveries revealed that these teeth were actually the front teeth ("premaxillary teeth") of Tyrannosaurs - and are now known as a hallmark of their clade, Tyrannosauroidea (along with fused nasals). Closely-spaced, parallel grooves on bones suggest that Tyrannosaurs used these teeth to selectively scrape meat from bone2. Identification Tyrannosaurid premaxi
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From the album: Hell Creek / Lance Formations
It's interesting to compare differently-sized teeth of similar positions. These might represent ontogeny or other dental variation (due to multiple species, etc.).-
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- tyrannosaur dental ontogeny
- young tyrannosaur
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From the album: Hell Creek / Lance Formations
It's interesting to compare differently-sized teeth of similar positions. These might represent ontogeny or other dental variation (due to multiple species, etc.). -
From the album: Hell Creek / Lance Formations
Tyrannosauridae (Cf. Tyrannosaurus rex) Hell Creek Fm., Wibaux Co., MT, USA This minute tooth is indeed Tyrannosaur: the mc/dc serration densities are virtually identical, and the denticle shape is not like those of Dromaeosaurids. It also has a slight pathology near the tip. -
Identification Tyrannosaur teeth characteristically have similar serration densities on each carina, with chisel-shaped denticles. Though small, this tooth matches those qualities, and doesn't resemble other smaller theropods like Dromaeosaurids. Identified as Cf. T. rex based on its similarity to another, larger tooth in my collection. Notes This tooth is from a juvenile individual. Serration densities illustrated in the above photos. There is a slight pathology (bend) near the tip.
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- juvenile tyrannosaur
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From the album: Hell Creek / Lance Formations
Tyrannosaurus rex Hell Creek Fm., Garfield Co., MT, USA This is from the right maxilla of a juvenile individual (note the lingual wear). Art by RJ Palmer-
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- tyrannosaur
- juvenile t rex
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Hi y'all, got this small theropod in the mail; I bought it suspecting it was Tyrannosaurid. Upon in-hand inspection, I believe that suspicion is confirmed. It bears close resemblance to one of my larger juvenile T. rex maxillary teeth. It also appears to have a slight pathology near the apex - a slight bend. @Troodon Tyrannosauridae Hell Creek Fm., Wibaux Co., MT, USA CH: 9 mm Mesial serration density: ~ 5.3 / mm Distal serration density: ~ 5 / mm Serration densities: Serrations:
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- hell creek formation
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Hell Creek Formation Juvenile Tyrannosaurid Teeth
ThePhysicist posted a gallery image in Members Gallery
From the album: Dinosaurs
A juxtaposition of the bases of two juvenile Tyrannosaurid tooth crowns from the Hell Creek Formation. Nanotyrannus: Dawson Co., MT Tyrannosaurus: Carter Co., MT- 1 comment
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- juvenile tyrannosaur tooth
- nanotyrannus v t rex
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