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Cowshark Symphyseal? Do You Know Where It Is?


cowsharks

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Below are a couple pics of a 7-gill cowshark tooth found along Calvert Cliffs back in 1985. I believe the person that found the tooth traded/sold it, but it's exact whereabouts and owner isn't known at this time. I'm really interested in this tooth and would love to contact the owner. If you're the owner, or know who is, could you post back here or send me a message. Thanks.

This particular cowshark tooth was thought to be a large lower symphyseal. If it is, at 1" wide it's the largest I've ever seen or heard of. From the pics though, I think it's more likely a pathological combination of two lower teeth. I don't see any noticeable angle between the root and teeth; typically in symphyseals, there's about a 30 to 45 degree angle between the root and crown/conules. I have approx 30 lower cowshark symphyeals from Calvert Cliffs, and they all exhibit a certain degree of angle between the root and crown. Either way, this tooth is really neat and I'd love to be able to see it in person.

Daryl.

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I hate you Daryl..... "I have approx 30 lower cowshark symphyeals form Calvert Cliffs..."

4 years+ of searching (over 40 lowers) and I have yet to even sniff my first symph. :(

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That's a pretty sweet tooth( lol)SOMEONE has there. the best IVE seen

How bout a symphseal from Oregon. quite rare. and another. Also quite rare. these are the only two Heptranchus? I've found in Oregon.

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That's a pretty sweet tooth( lol)SOMEONE has there. the best IVE seen

How bout a symphseal from Oregon. quite rare. and another. Also quite rare. these are the only two Heptranchus? I've found in Oregon.

Wow. Oregon? Didn't know you could find shark teeth in Oregon. The larger tooth appears to be a Hexanchus gigas, similar to those found at Lee Creek.

Daryl.

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It looks like a Hexanchus symphyseal to me. Hex teeth are VERY rare along Calvert Cliffs. I have only seen two from there, both were lowers, and one was broken.

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They are quite rare here too. yes Hexanchus. They are just bonus pieces as im looking for marine vertebrates. Did someone say they had 30 of em?

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They are quite rare here too. yes Hexanchus. They are just bonus pieces as im looking for marine vertebrates. Did someone say they had 30 of em?

I think Daryl (cowsharks) meant he has 30+ Notorhynchus (7 gill) Symphyeals. Not Hexanchus. I've seen photos of his collection of Notorhynchus and it is jaw dropping. His collection has to be one of the best in the world. Daryl, can you post a picture of it again?

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I think Daryl (cowsharks) meant he has 30+ Notorhynchus (7 gill) Symphyeals. Not Hexanchus. I've seen photos of his collection of Notorhynchus and it is jaw dropping. His collection has to be one of the best in the world. Daryl, can you post a picture of it again?

Sure. Here's most of them from Calvert Cliffs:

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WOAHOOAH ! I've never seen that many cow shark teeth in one place? It would take many lifetimes to accumulate that many sharkteeth here in Oregon, and many more lifetimes on top of that to amass that many notorhyncus.

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WOAHOOAH ! I've never seen that many cow shark teeth in one place?

Yep, I've been truly blessed with being able to find my most favorite of all shark teeth.

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Daryl,

I agree with PaleoRon that it looks more like a Hexanchus symphyseal while wondering if it could be an unusually large Notorynchus of the same jaw position. I've seen a number of STH symphyseals which are all apparently Hexanchus. They show a rather wide range of morphologies said to be in part due to differences in male and female dentitions. I would assume there could be variations in Notorynchus even taking into account your rather large private sample.

Jess

It looks like a Hexanchus symphyseal to me. Hex teeth are VERY rare along Calvert Cliffs. I have only seen two from there, both were lowers, and one was broken.

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Sure. Here's most of them from Calvert Cliffs:

Thanks Daryl! That collection is straight up awesome. Like I said before.... it has to be one of the best in the world. I can only imagine the hundreds of hours of collecting time behind those teeth. Thanks again for sharing.

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Thanks folks.

Update: I spoke to the original owner and person who found this tooth back in 1985. He said he eventually donated to the Smithsonian Museum of Natural History in Washington DC, specifically to Dr. Robert Purdy who was the Paleontologist at the museum at the time. So, looks like if I ever want to see this tooth I'll have to arrange something with the folks at the Smithsonian.

Daryl.

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..... I can only imagine the hundreds of hours of collecting time behind those teeth...

Jason, for that one particular beach, I would estimate that I've been there 750 times in 17 yrs of collecting, beginning in Jan 1996. The first few years I used to go twice a week because the "fever" was strong.

What I really benefitted from in my first few years was the result of "3 ladies"; Bertha, Fran, and Josephine. These three women were all Tropical Storms that hit Maryland starting in July of 1996, Sep of 1996, and then Oct of 1996. The huge amounts of rain, wind, and storm surge caused tremendous sections of Calvet Cliffs to break away. There was a time shortly after all those storms, that there was literally one huge "fall" than ran over half the total collecting length down at Brownies beach. The fall/pile of dirt was so high that you could walk across the top of it and be right up aginst the zone 10 layer. I remember in those days that I would walk down the beach in one direction out in front of the massive fall looking for teeth, and on my way back, just walk across the top of the pile where it was much easier to walk. Then, hop back down in front of the fall and walk in front of it again looking for more teeth. That huge fall produced so many teeth it was unbelievable. Fossils washed out of that fall for several years, which I was able to take advantage of. After several years and that massive pile dwindled down to a few individual smaller piles, fewer fossils showed up as more and more collectors showed up. Simple law of supply vs. demand. Nowadays with there being so little new material that erodes, and so many more collectors, it is much harder to come away with many finds unless you're willing to work for them. Those were the "good ol days" for me.

Daryl.

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Daryl, that is an amazing collection of Cow Shark teeth. Makes mine pale in comparison. As far as you tooth in question I have to agree with siteseer and PaleoRon that it looks like a Hexanchus symphyseal. And those "ladies" you are talking about, I am glad they brought someone luck. In 96 Bertha and Fran reeked havoc here, I had major damage from Fran. The eye from Bertha passed over top of my house. BTW, I am sending you a PM.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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Nice collection of cowshark teeth,

I also have two teeth that look like the one from your topic.

The big one is from Chilly and the other from germany.

The Symphyseal is also from calverd cliffs and the rest are a vew I did vind in Mill (Netherlands)

Greetings Erik

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Nice collection of cowshark teeth,

I also have two teeth that look like the one from your topic.

The big one is from Chilly and the other from germany.

The Symphyseal is also from calverd cliffs and the rest are a vew I did vind in Mill (Netherlands)

Greetings Erik

Eric, those are some really nice cowshark teeth. In the third picture, the dark colored tooth in the top right looks to be a Hexanchus gigas, upper lateral. The serrations on the mesial edge, along with the lack of an indentation on the mesial edge indicate that it is an upper tooth and not a lower. Notorynchus uppers do not have such robust roots however Hexanchus teeth do. Is it possible that you also find Hexanchus at the Mill (Netherlands)?

Daryl.

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Is it possible that you also find Hexanchus at the Mill (Netherlands)?

Yes thy are fond in Mill.

All the teeth you see on the photo's are fond by me in Mill.

When I have some more time I will post more and better photo's of them.

Greetings Erik

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  • 5 years later...
On 1/2/2013 at 3:02 PM, PaleoRon said:

It looks like a Hexanchus symphyseal to me. Hex teeth are VERY rare along Calvert Cliffs. I have only seen two from there, both were lowers, and one was broken.

I agree completely. That large, if it is a symphyseal has to be Hexanchus.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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