Extraordinary Common Teeth

[isurus90064]

Parts of the STH bonebed are very well compacted into solid blocks of matrix or concretions. This particular Allodesmus tooth sits in some very hard matrix and so as of yet the total length of the tooth is a bit of a guess, but based on other teeth of similar position and proportion I'd guess it to be somewhere between 6-7".

 

Allodesmus kernensis

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[isurus90064]

I've been on the fence with this one, take it out of the matrix or leave it in ......

[caldigger]

I'd leave it.  

For me it's like asking "should I pluck all these teeth out of this Mosasaur jaw?"

 

It makes for a much more interesting piece to still be intact within the jaw portion.

[isurus90064]

I see what you mean caldigger, but the tooth is not actually sitting in a socket, it's not actually sitting in the jaw. It's really just a compaction of bone fragments. If it were the jaw, I would never take it out.

[siteseer]

16 hours ago, isurus90064 said:

I've been on the fence with this one, take it out of the matrix or leave it in ......

 

On one hand it's a great display piece if there's enough matrix for the tooth to be upright and stable.  It looks like you could still scribe into it a little on the side to determine the overall size of the tooth or at least have a good idea to within a 1/4 to 1/2 inch.  On the other hand if it's the largest Allodesmus canine you have, you might want it out of matrix.  I would leave it in even if it is the largest one you have. 

 

A 6-7 inch canine is very large (might even be in the range of the largest canines known for the genus) and most found are very worn but yours looks like it still has at least most of the enamel on it.  I have a smaller one that has no enamel left..

 

Jess

[isurus90064]

Hey Jess,

 

Thanks for the feedback, I might prod at it a little bit, see if I can find the other end.

 

In the meantime, here's another Allodesmus that's kind of a mess. You can see many diagnostic features, but also a pretty severe postmortem deformation.

 

I outlined anything that is fossil in red.

 

Allodesmus kernensis

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[isurus90064]

Added a couple more pics to the Aetomylaeus sp. teeth on the previous page.

[isurus90064]

Collected in the 90's - Ant Hill

 

Isurus planus

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[isurus90064]

Collected in the 90's - Ant Hill

 

Isurus planus

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[isurus90064]

Collected in the 90's - Ant Hill

 

Isurus planus

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[isurus90064]

Collected in the 90's - Ant Hill

 

Isurus planus

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

 

[caldigger]

Ant Hill must have been a nice place to collect back in the day.  Beautiful colors!

[fossilsonwheels]

Two Cretaceous Cow Shark teeth. I just got the Notidanodon tooth and I love it. The Hexanchus microdon is one of my favorites. 

 

Notidanodon lanceolatus

Cretaceous Albian

Seversk Sandstone 

Stary Oskol, Russia 

 

Hexanchus microdon

Upper Cretaceous 

Northumberland Formation 

Hornby Island

BC, Canada

[Troodon]

On 9/30/2019 at 9:02 PM, isurus90064 said:

Parts of the STH bonebed are very well compacted into solid blocks of matrix or concretions. This particular Allodesmus tooth sits in some very hard matrix and so as of yet the total length of the tooth is a bit of a guess, but based on other teeth of similar position and proportion I'd guess it to be somewhere between 6-7".

 

Allodesmus kernensis

 

Great display piece the way it stands

[Troodon]

Wow that California material is super cool and I appreciate you posting it...love looking at it.

Here is an common Meg from a not so common locality.

 

[fossilselachian]

First I have ever seen from this location. Wonderful tooth!

[isurus90064]

@Troodon Absolutely amazing tooth, not only an extremely unusual location, but also fantastic quality!! Congrats and thanks for posting!

[isurus90064]

Isurus planus - lower teeth

 

A smaller % pf these teeth will exhibit incomplete cutting edges along the lines of what you see in Isurus oxyrinchus. Typically the teeth that do are located closer to the symphysis.

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[isurus90064]

Here is one such example. The cutting edge only cover 60% of the crown on both the distal and mesial sides. In Isurus oxyrinchus that shows up on upper and lower anteriors, although to a lesser extend on the second anteriors and in particular on the distal edges.

 

Isurus planus - right lower anterior

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

 

 

 

[isurus90064]

@fossilsonwheels thanks for posting those great cow sharks.

@caldigger Ant Hill in the 90's was relatively untouched. It was one of a couple of places where people could collect if they didn't have access to STH. Another one of those places was Poso Creek or along Hwy. 178.

[isurus90064]

Some more color variants .. "West Quarry" STH.

 

Maybe I should put together a map with all the different STH locations. There are a number of different names for the same localities as well, just to make things confusing.

 

Isurus planus

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[isurus90064]

"West Quarry"

 

Isurus planus

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[isurus90064]

"West Quarry"

 

Isurus planus

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[isurus90064]

"West Quarry"

 

Carcharodon hastalis

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

[siteseer]

4 hours ago, isurus90064 said:

"West Quarry"

 

Isurus planus

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

 

Hi Isurus90064,

 

Nice one.  I always liked the blue teeth.  I didn't find many of those.

 

Jess