Extraordinary Common Teeth

[isurus90064]

Cosmopolitodus hastalis

Between Lusaw and Broad Rivers, SC

 

[Coco]

Hi,

Very nice tooth !

Please, would you put the latin name when you have them ? It would allow everybody to perfect his knowledge !

Coco

[isurus90064]

I added the genus/species names for the ones I recently posted. Thanks for visiting.

[isurus90064]

This tooth has an area towards the tip without any serrations. At the same time it also bears the largest serrations I have seen on a "Great White".

 

~2.90" - 7.37cm

 

~4.5-2.6mya (based on micro fossils)

Lechero Member

Bahia Inglesa Formation

Near Caldera, Chile

Provincia Copiapo

III Regio de Atacama

Chile

 

 

The Bahia Inglesa Formation includes 3 lithostratigraphic members; the coarse conglomeratic basal Morro Member (Unit 1); the phosphoritic Bahía Inglesa Formation Bonebed Member (Unit 2), and the fine sand and siltstone Lechero Member (Unit 3, all from Walsh and Hume 2001). (Tsuchi et al. , 1988; Ibaraki, 1992, 1995).

 

This posting is to consolidate a posting from another thread I started a long time ago.

 

[Coco]

Hi,

Thanks Isurus !

Coco

[Troodon]

Very cool Chilean GW. Wonder if it's a transitional tooth or just pathological or ?

[kkborch]

That is a very nice GW! I would call it transitional if it were in my collection.

[Auspex]

I would not have wanted to be a penguin there...

[isurus90064]

Hey Auspex,

Agreed, although the penguins from that time and place were quite the monsters themselves :-).

Also, the chilean tooth is most defnitely a transitional tooth. One interesting fact about Cosmopolitidus transitional teeth is that the serrations are almost "out of control". While some teeth only have a hint of consistent serrations, others show a definite size gradation along the cutting edge that goes from fully serrated to non-serrated towards the tip (typically this gradation is also very irregular as in the above tooth). Yet again, other transitionals seem to bear consistently heavy (much heavier than younger great whites) and irregular serrations. The only thing consistent is the irregularity of serration development.

I don't think it's clear whether these drastically different serration characteristics in transitional "Great Whites" are sequential vs. concurrent in time. The "resolution" of time in deposits producing these transitional teeth may never be high enough to see that development (also, other factors may make that impossible to prove that either way).

To me it looks like serration development is something that "breaks through" as a tooth character in somewhat of an abrupt and almost "violent" manner, before it settles in a more consistent, more regular pattern found in younger C. carcharias. This seems to be true for Carcharocles as well.

Edited September 14, 2015 by isurus90064

[isurus90064]

Back from another work trip. Btw work really interferes with fossil fun.

Also, here are some new STH teeth. I'll photograph more this week.

I'll edit this post later to include more accurate locality info.

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield

Kern County, CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

 

[isurus90064]

~3.01" - 7.65cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield

Kern County, CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

 

[Auspex]

Oooooo, the calico is unusual!

[kkborch]

You seem to have an endless supply of nice 3"+ STH makos!

[isurus90064]

Hey guys,

Posting a few more STH teeth.

 

~2.85" - 7.24cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield

Kern County, CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

~2.35" - 5.97cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield

Kern County, CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

~2.88" - 7.32cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

~2.94" - 7.47cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[ynot]

That is a lot of really nice and big teeth from sth!!

I do not know what else can be said....

Tony

[isurus90064]

One more for tonight

 

~2.91" - 7.39cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

Left ~2.76" - 7.01cm

Right ~2.29" - 5.82cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield

Kern County, CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

Left ~2.21" - 5.61cm

Right ~2.12" - 5.38cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield

Kern County, CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

Left ~2.44" - 6.20cm

Right ~2.24" - 5.69cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield

Kern County, CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

Left ~2.13" - 5.41cm

Right ~2.35" - 5.97cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield

Kern County, CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

Left ~2.18" - 5.54cm

Right ~2.17" - 5.51cm

 

C. hastalis

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield

Kern County, CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

Thanks guys, as you guys have done before, just doing my part to keep this thread interesting.

You seem to have an endless supply of nice 3"+ STH makos!