My Collection

[Jaimin013]

Juvenile Tyrannosaurid tooth (Probably a T-Rex tooth)

Hell Creek formation, Montana

Size: 2.25 inches in length (straight-line measurement)

 

It doesn't get much cooler than this tooth! A fully rooted theropod tooth and it's thick, bannana-like shape makes me lean more toward Tyrannosaur than Dromaeosaur. Thanks @lone5wolf117!

 

Photo of tooth in my hand so that you can get an idea of scale

[Jaimin013]

Some more photos of my Tyrannosaurus Rex and Nanotyrannus teeth lined up. From left to right: 3 inch trex, 2 inch nano, 2 inch rooted Juvenile rex, Leaning towards rex on 4th tooth, Rooted Nano, Juvenile Rex

 

[Praefectus]

Nice lineup!

[Jaimin013]

2 hours ago, Praefectus said:

Nice lineup!

Thanks I thought that it would be interesting to share photos of all of them lined up so they can be compared. They are also a variety of teeth so its cool to group them together!

[Bobby Rico]

Jamie nice collection indeed I really like your juvenile T.rex tooth.  Your really building a fantastic collection.

 

I have a small Tyrannosaurid tooth but I can’t say if it is a Nanotyrannus or T.rex. 

[Jaimin013]

1 hour ago, Bobby Rico said:

Jamie nice collection indeed I really like your juvenile T.rex tooth.  Your really building a fantastic collection.

 

I have a small Tyrannosaurid tooth but I can’t say if it is a Nanotyrannus or T.rex. 

Thanks @Bobby Rico! I really like the juvenile teeth looks really cool. I do agree though it is often tough determining nano vs rex especially with small teeth.

[Bobby Rico]

3 minutes ago, Jaimin013 said:

Thanks @Bobby Rico! I really like the juvenile teeth looks really cool. I do agree though it is often tough determining nano vs rex especially with small teeth.

It nice to believe it is a juvenile T.rex . Like yours mine is a little beauty.  

[Jaimin013]

1 minute ago, Bobby Rico said:

It nice to believe it is a juvenile T.rex . Like yours mine is a little beauty.  

It sure is, I think you may have already showed me a pic of yours but please could you share again when you have time? thanks!

[Bobby Rico]

14 minutes ago, Jaimin013 said:

It sure is, I think you may have already showed me a pic of yours but please could you share again when you have time? thanks!

 

 

 

Tyrannosaurid indet  - 5/8" (1.6cm)

Could be a juvie maxillary Rex or Nano

Harding County, SD

[Jaimin013]

4 minutes ago, Bobby Rico said:

 

 

 

Tyrannosaurid indet  - 5/8" (1.6cm)

Could be a juvie maxillary Rex or Nano

Harding County, SD

Awesome tooth, thanks for sharing again!

[Bobby Rico]

21 minutes ago, Jaimin013 said:

Awesome tooth, thanks for sharing again!

Cheers Bobby 

[Jaimin013]

My collection of Iguanodon teeth.

[Huntonia]

Out of interest, where do you get these teeth? My collection is pretty lacking in dinosaur material. 

[JohnBrewer]

4 hours ago, Jaimin013 said:

My collection of Iguanodon teeth.

Wow!

[Jaimin013]

3 hours ago, JohnBrewer said:

Wow!

Thanks @JohnBrewer!

[Jaimin013]

15 hours ago, Huntonia said:

Out of interest, where do you get these teeth? My collection is pretty lacking in dinosaur material. 

If you are just starting out collecting dinosaur teeth searching for dinosaur fossils for sale on google will bring back quite a lot of websites. Unfortunately, a lot of the fossils online and on auction websites only have certain types of teeth. The more rarer species you don't see as often or at all online but I've had to build my contacts by asking around and spent hours, days, weeks and months searching. Researching who has also posted about the types of fossils that you are looking for also helps as it's a good place to start as they will be able to help you along the way and advise who to potentially ask. It takes a long time but it's worth it in the end. The UK material is from someone I know that regularly visits the IOW but this year they have told me it has been really difficult as all their sources aren't having much luck.

[Jaimin013]

My Allosaurus fossil collection.

 

[Jaimin013]

Left to right

 

Tyrannosaurus rex

Scollard Formation

Edmonton Group

Drumheller, Alberta

Canada

 

Tyrannosaurid indeterminate

Dinosaur Park Formation

Drumheller

Alberta, Canada

 

Appalachiosaurus Montgomeriensis

Bladen County, North Carolina

Tar Hell Formation

Black Creek Group

My second Appalachiosaurus but this one has really nice serrations

 

[Jaimin013]

Machairodus

Gansu Province, China

 

Sabre tooth jaw with fang teeth. Likely Machairodus. One of the coolest fossils that I have seen.

 

Perhaps one of the greatest predators that mankind ever had to come face-to-face against was the saber-toothed cat. Movies such as 10,000 B.C., Ice Age, The Croods, and even the Flintstones have popularised the Smilodon of the La Brea Tar Pits of 1.6 million to 10,000 years ago. North America’s Smilodon fatalis weighed in at 160 to 280 kg, had a shoulder height of up to 100 cm, and reached a body length of 175 cm. However, it was dwarfed by the machairodontine species, which lived in Asia, Africa, Europe, and North America from 11.6mya—126,000 years ago, and existed for about 11.5 million years between the Miocene and the Pleistocene.

 

Machairodus giganteus, the largest known species known within the genus Machairodus, was a large lion-sized saber-toothed cat with elongated upper canines and cheek teeth efficiently adapted for slicing meat. The animal is known mostly from a variety of fragmentary fossils found through Europe and Asia, with the best-preserved skulls coming from China. This ‘king-of-saber-tooths’ was possibly a pack hunter, the apex predator roaming the savannahs of Central Asia, such as the Hezheng County of Gansu Providence in China. These plains resembled the Serengeti in Africa today. M. giganteous preyed on herds of gomphotheres, hippo-like rhinos, giraffids, and medium-sized fast-running antelope. It closest competitor was Dinocrocta, the giant hyena, which reached the size of a grizzly bear.

Fossil specimens of M. giganteus are exceedingly rare, with many museums discovering only fragmentary specimens.

 

[Jaimin013]

Mixosaurus panxianesis

Guizhou, China

 

One of the most impressive marine reptile (Ichthyosaur) fossils that I've seen especially from this location. An extinct genus of Middle Triassic (Anisian to Ladinian, about 250-240 Mya) ichthyosaur. Its fossils have also been found near the Italy–Switzerland border.

 

The genus was named in 1887 by George H. Baur. The name means "Mixed Lizard", and was chosen because it appears to have been a transitional form between the eel-shaped ichthyosaurs such as Cymbospondylus and the later dolphin-shaped ichthyosaurs, such as Ichthyosaurus. There's some evidence that the appropriately named Mixosaurus may have been a transitional form between early and later ichthyosaurs. This marine reptile combined some primitive features of early ichthyosaurs—a downward-pointing, relatively inflexible tail, and short flippers—with the sleeker shape and (presumably) faster swimming style of their later descendants. Also, unlike the case for most ichthyosaurs, fossils of Mixosaurus have been discovered all over the world, a clue that this marine reptile must have been especially well-adapted to its environment.

 

There are 3 species of Mixosaurus currently recognised, Mixosaurus cornalianus, Mixosaurus panxianesis and Mixosaurus kuhnschnyderi.

 

The last pic shows what one would have looked like.

 

 

[Praefectus]

Nice specimen. Don't drop it out the window by accident. 

[Jaimin013]

Just now, Praefectus said:

Nice specimen. Don't drop it out the window by accident. 

Haha I had a firm grip of it! That would be disastrous 

[Jaimin013]

Razanandrongobe sakalavae

Mahajanga, Isalo IIIb rock unit

Madasgascar

3 inches

 

This tooth is the largest raz tooth that I've ever seen. Raz is a genus of carnivorous sebecosuchian from the Middle Jurassic of Madagascar and based on MSNM V5770, a fragment of maxilla, the main tooth-bearing bone of the upper jaw, and several isolated teeth have also been assigned to it. Raz is estimated at around seven metres in length and this measurement has been calculated by comparing the Razanandrongobe fossil material with better-known and more complete baurusuchids, another type of Notosuchian from South America. It's the largest known Jurassic member of the Mesoeucrocodylia. In life, the length of its skull likely surpassed that of Barinasuchus, which has been estimated at 88 cm (35 in) long.

The jaw fragment and teeth are similar to the representative bones of theropod dinosaurs and some types of crocodylomorphs, and the authors refrained from assigning the genus to either group. They interpreted the stout teeth as having been used for crushing bones, and their denticles are remarkably large, even larger than those of Tyrannosaurus. Remains described in 2017 have given further insight to the phylogeny of R. sakalavae, revealing it to be the oldest known notosuchian.

 

The last few pics is the raz next to my Liopleurodon ferox (Pliosaur), Tarbosaurus (cf. Zhuchengtyrannus) and Tyrannosaurus Rex tooth. Also are pictures of the reconstruction of the skull of raz and what one would have looked like.

 

[Jaimin013]

Daspletosaurus tooth

Fergus County, Montana

Judith River Formation

3.54 inches

 

I received this tooth on Monday and it has excellent serrations, the enamel is smooth and it has a strong curve. It has light feed wear but not excessive and is one of the tyrannosaur teeth in my collection. The fill in white is meant to show rather than to conceal as with many fossils. I have taken a photo of the Daspletosaurus tooth next to my Tarbosaurus (cf. Zhuchengtyrannus) and Tyrannosaurus Rex. There is also another picture of the tooth next to my other but jet black tyrannosaurid indet. (Daspletosaurus horneri or Gorgosaurus sp.).

 

Albertosaurus, Daspletosaurus and Gorgosaurus teeth are extremely difficult to tell apart from teeth so technically this is another indeterminate tooth but is really large so could be. Below is also a pic showing the Daspletosaurus torosus skull at the Museum of the Rockies in Bozeman, Montana and the left maxilla (upper jaw) from the Royal Tyrrell Museum.

 

[Jaimin013]

Eusauropoda indet.

Madagascar

About 45mm

 

This partially rooted sauropod tooth is my latest from Madagascar and is really cool. I have also posted a pic of my setup of some of my smaller Madagascan sauropod teeth in a riker.