Jump to content

AranHao

Recommended Posts

hello
This tooth is from Two Medicine fm Montana.I bought it in Tucson.This tooth needs a lot of repair.
CH:9.1cm
CBL:3.3cm
CBW:2.3cm
Mesial serration density(mid-line): 10/5mm
Distal serration density(mid-line): 10/5mm
enamel texture:Braided or Irregular 

 

thanks!!!

 

 

20220827_020520.thumb.jpg.f12bcb08734915c2cf54c25bc00d7fd3.jpg

 

20220827_020433.thumb.jpg.dbc311f02c0fb47d519dd909b942086f.jpg

 

20220827_020418.thumb.jpg.24d114aad521a0e53bb176a1539366fc.jpg

 

20220827_020353.thumb.jpg.4c18b6ce35bd901e352a0502c9398761.jpg

 

20220827_020625.thumb.jpg.91b0c3f63b2e180f405a6d50b8522d66.jpg

 

20220827_020530.thumb.jpg.fb480cdea776f63ff110858e940c2345.jpg

 

20220827_021426.thumb.jpg.8a732d69b0e129ceff72c81bad5eda91.jpg

 

20220827_021410.thumb.jpg.8054a9d09166069a5f8e14b65e8fe92d.jpg

 

20220827_021359.thumb.jpg.7c239f03c227dc9856a03f6201be3435.jpg

 

20220827_021343.thumb.jpg.492525b8da5b34c9352535382aece0bb.jpg

 

pt2022_08_27_02_58_36.thumb.jpg.885ee958287b1e6423481876842f01e7.jpg

 

pt2022_08_27_02_59_58.thumb.jpg.d565d76c6f8b232950f20a53d9b1dc32.jpg

  • Enjoyed 1
Link to comment
Share on other sites

Definitely a Tyrannosaurid and big enough to be a Daspeletosaurus not Gorgosaurus.  Do you have a location where it's from ? 

  • I found this Informative 1
Link to comment
Share on other sites

19 minutes ago, Troodon said:

  Do you have a location where it's from ? 

Unfortunately, I lost the label when I moved:DOH:. I only remember it was the Two Medicine fm, Montana

Link to comment
Share on other sites

Without a locality you cannot be positive its from the TMF especially if its from Montana.  Size does say its a Daspletosaurus sp. but will not give it a species name because of the lack of a complete provenance.

 

Link to comment
Share on other sites

@Troodon

I'm sorry for my interruption,

1, Is this a lateral dentary?

2, And I'm sorry for my poor English. I don't know the relationship between the anterior teeth and the mesial teeth. Does the mesial teeth include the anterior teeth

 

Link to comment
Share on other sites

The oval shape typically suggest an anterior dentary tooth.  Here is a paper on tooth terminology. 

Terminology .pdf

 

When it comes to jaw position the teeth in the front of the jaw are mesial but some like use anterior.

Similarly those toward the back are distal or posterior.  So both anterior or mesial tell you its in front of the jaw. 

Screenshot_20220831-105254_Drive.thumb.jpg.b570fd3e866db798cb4be0c4a5ba559c.jpg

  • I found this Informative 1
Link to comment
Share on other sites

21 minutes ago, Troodon said:

The oval shape typically suggest an anterior dentary tooth.  Here is a paper on tooth terminology. 

Terminology .pdf 7.3 MB · 1 download

 

When it comes to jaw position the teeth in the front of the jaw are mesial but some like use anterior.

Similarly those toward the back are distal or posterior.  So both anterior or mesial tell you its in front of the jaw. 

Screenshot_20220831-105254_Drive.thumb.jpg.b570fd3e866db798cb4be0c4a5ba559c.jpg

I am very excited about this. Thank you. I will continue to study!!

Link to comment
Share on other sites

Yes size is key I don't think you will see Gorgosaurus teeth that large, but I might be wrong .    Not sure how effective Hendrickx identification technique is on all teeth, especially large ones and I have not had much experience using it.  My concern initially and still is that I see quite a bit of variation in the density of tyrannosaurid teeth so it may effect the results.

Link to comment
Share on other sites

17 minutes ago, Troodon said:

Yes size is key I don't think you will see Gorgosaurus teeth that large, but I might be wrong .    Not sure how effective Hendrickx identification technique is on all teeth, especially large ones and I have not had much experience using it.  My concern initially and still is that I see quite a bit of variation in the density of tyrannosaurid teeth so it may effect the results.

but, I saw a 3.47 inches Gorgosaurus teeth in the Dallas auction , which is very close to my tooth in size 

https://fineart.ha.com/itm/natural-history/dinosaur-tooth-gorgosaurus-sp-cretaceous-judith-river-formation-mont/a/29151-48203.s?ic4=ListView-Thumbnail-071515

Link to comment
Share on other sites

Identification of isolated teeth is not easy and Hendrickx technique may be valid with says your tooth is "cf Gorgosaurus". If it is it would be an extremely large one, not sure what to tell you.  I have not seen one that large, they may exist.

 

 I will say that because you saw one sold in an auction does not guarantee it was identified correctly and there are no Tyrannosaurids described from the JRF.   However most believe both Gorgosaurus and Daspeletosaurus exist.

Link to comment
Share on other sites

9 minutes ago, Troodon said:

Identification of isolated teeth is not easy and Hendrickx technique may be valid with says your tooth is "cf Gorgosaurus". If it is it would be an extremely large one, not sure what to tell you.  I have not seen one that large, they may exist.

 

 I will say that because you saw one sold in an auction does not guarantee it was identified correctly and there are no Tyrannosaurids described from the JRF.   However most believe both Gorgosaurus and Daspeletosaurus exist.

You're right. I know. I think this tooth is Daspletosaurus more

Link to comment
Share on other sites

  • 4 weeks later...

Yes at this point its an indeterminate Tyrannosaurid from two points:  size at 3" is a concern, not sure on mesial dentary teeth and no locality.

Link to comment
Share on other sites

17 hours ago, Troodon said:

Yes at this point its an indeterminate Tyrannosaurid from two points:  size at 3" is a concern, not sure on mesial dentary teeth and no locality.

Is this topic still work?  well, it was six years ago..... A crown over 3 inches is the only positive method. Unfortunately, the tooth tag was lost following the replacement of the display box.

 

http://www.thefossilforum.com/index.php?/topic/60636-dont-get-fooled-buying-daspletosaurus-dino-teeth/&tab=comments#comment-646091

Link to comment
Share on other sites

I remeasured the denticle density (forgive my ruler), DC is 9/5 mm and MC is 8.5 (9)/5 mm . From this topic(Your discussion with Andy,its amazing !), may it be proved that is Daspletosaurus (D. horneri)? 

mmexport1664176385605.thumb.jpg.b60dda2cdcb053d4aa88bac169dd0723.jpg

 

mmexport1664176399904.thumb.jpg.832c0de0e502a6876967de5f6c92c321.jpg

 

mmexport1664176121833.thumb.jpg.2eaf401b74ea85db848bc4fdb392b9f5.jpg

Edited by AranHao
replenish
Link to comment
Share on other sites

Ha ha what luck.  Thats definitely two  Medicine.

Look all I can go by is Hendrickx analysis on to POSSIBLY identify Daspletosaurus teeth and your tooth fails that test.   So.. its your tooth call it whatever you are comfortable with. .

Link to comment
Share on other sites

@TroodonI don't think Hendrickx analysis has any effect on D. horneri,You can see that most of the DSDI of MOR590 in the chart range from 1.09 to 1.13, and only one is 1.28, which can overturn Hendrickx analysis. After all, its data only refer to the samples of Dinosaur Park FM

mmexport1664294476511.jpg.f7dec354bc6b7a3ff6761d44a6475e2c.jpg

Link to comment
Share on other sites

They have skull that describes those teeth makes it a bit easier.   Isolated teeth can have lots of variation as you can see with those numbers.

In Currie's et al. paper it shows, these charts.  Not important what the components are but that these tyrannosaurid features can occupy the same Morphological space.  Why its so hard to ID campanian tyrannosaurid isolated teeth.

 

Screenshot_20220927-093913_Drive.thumb.jpg.7f48cd9dcba2d7c8a04ebfd63681d04f.jpg

Link to comment
Share on other sites

9 hours ago, Troodon said:

They have skull that describes those teeth makes it a bit easier.   Isolated teeth can have lots of variation as you can see with those numbers.

In Currie's et al. paper it shows, these charts.  Not important what the components are but that these tyrannosaurid features can occupy the same Morphological space.  Why its so hard to ID campanian tyrannosaurid isolated teeth.

 

Screenshot_20220927-093913_Drive.thumb.jpg.7f48cd9dcba2d7c8a04ebfd63681d04f.jpg

Yes , we can only say similar , so I remeasured the teeth ( CH : 7.7cm CHR : 2.43 CBR : 0.727 ) . According to the chart , it can only be said that the data may be D. horneri

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...