20 replies to this topic

[Coco]

Most of members of this forum are interested in fossil sharks. But it is sometimes useful to compare these fossils with the recent jaws for understanding the various teeth of every species and their positions in the jaw (see this thread http://www.thefossil...__1#entry123920 )

I propose to put here your recent jaws of selachians, to obtain a good range of existing species actualy.

I begin with the largest shark family, the Carcharhinidae. They are difficult to identify because these species are very numerous and a lot of them have same lower teeth...

As I shall make my photos, I shall integrate the new ones into this initial subject in the order of families.

CARCHARHINIDAE



Carcharhinus acronotus - Blacknose shark



Carcharhinus altimus - Bignose shark



Carcharhinus brevipinna - Spinner shark





Carcharhinus falciformis - Silky shark







Carcharhinus limbatus - Blacktip shark







Carcharhinus macloti - Hardnose shark

Thanks for your interest

Coco

Edited by Coco, 10 December 2010 - 08:54 AM.

[siteseer]

Coco,

Thanks for the photos. It is good to have modern reference specimens and photos of whatever you don't have. Some people will buy jaws just so they take the teeth out and glue them in order by quadrant on sheets especially when the jaws are damaged but the species is unusual. Having these references allows collectors to see for themselves the often subtle differences and variations from jaw position to jaw position. Your examples of Carcharhinus species are particularly helpful to collectors because each of them has a fossil record. Jaws of modern species without a known fossil record (as in the case of some deepwater forms) expose blank spots in our knowledge and show us what to keep an eye open for when collecting in sediments representing the same types of habitats of the descendants or relatives.

Coco, on 07 September 2010 - 07:42 AM, said:

Most of members of this forum are interested in fossil sharks. But it is sometimes useful to compare these fossils with the recent jaws for understanding the various teeth of every species and their positions in the jaw (see this thread http://www.thefossil...__1#entry123920 )

I propose to put here your recent jaws of selachians, to obtain a good range of existing species actualy.

I begin with the largest shark family, the Carcharhinidae. They are difficult to identify because these species are very numerous and a lot of them have same lower teeth...

As I shall make my photos, I shall integrate the new ones into this initial subject in the order of families.

Thanks for your interest

Coco

[Scylla]

As always stunnig photos Coco, thanks for posting them.

[Coco]

CARCHARHINIDAE



Carcharhinus melanopterus - Blacktip reef shark



Carcharhinus obscurus - Dusky shark





Carcharhinus plumbeus - Sandbar shark

Coco

Edited by Coco, 07 December 2010 - 07:27 AM.

[Ordovician_Odyssey]

are these all yours!? there amazing.....i've alwase had a huge interest in marine biology.......where do you get them?

[Paleoc]

I think your bull is actually a dusky. The lower teeth aren't right for a bull and the tooth count is off. Dusky's typically have 14 uppers per side (not counting symphyseals) while bulls have 12-13.

http://www.elasmo.co...leucas-dent.jpg

Note the more massive lower teeth with arched roots

Edited by Paleoc, 06 December 2010 - 09:17 PM.

[Coco]

Hi,

Trilobite Guy, They are mine. I bought most of them for a very long time, on Eb-y. Someone are maybe badly identified because the salesmen did not know necessarily what they had, and when I verified their names, I had not all the tools which we have at our disposal today. I didn't verify the names for a long time.

Thanks a lot Paleoc for your comment. You are right ! I corrected my posts...

Coco

[Coco]

CARCHARHINIDAE



Carcharhinus sorrah - Spot-tail shark


A young one



MALE Carcharhinus wheeleri - Blacktail reef shark

Coco

[RickNC]

I was checking out a decent set of mako jaws last night.

[Ordovician_Odyssey]

i love the jaw because its really cool to see just the jaws, because then you can see the huge differences between each species .........are the jaws pricy$$?

[FossilForKids]

Here's a modern snag with 3 fossil hemis for scale

Attached Thumbnails

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[alopias]

great collection Coco

[Coco]

RickNC : do you have any pics of mako ?

Trilobite Guy : I am interested in recent selachian jaws to observe the multitude of sorts of teeth and their positions in a jaw.
My more expensive jaw is a big Galeocerdo cuvieri (112,50 € = 149,21 US$) I have bought for a friend, but I done a mistake with the price. I thus kept it for me. My less expensive jaws are the ones I prep myself (most of them are rays).

FossilForKids : your Hemipristis elongatus is nice. Do you have lower fossil teeth of Hemipristis ? (serra ?).

Alopias : thanks. It is just the beginning

Coco

[FossilForKids]

Coco, on 07 December 2010 - 07:34 PM, said:

RickNC : do you have any pics of mako ?

Trilobite Guy : I am interested in recent selachian jaws to observe the multitude of sorts of teeth and their positions in a jaw.
My more expensive jaw is a big Galeocerdo cuvieri (112,50 € = 149,21 US$) I have bought for a friend, but I done a mistake with the price. I thus kept it for me. My less expensive jaws are the ones I prep myself (most of them are rays).

FossilForKids : your Hemipristis elongatus is nice. Do you have lower fossil teeth of Hemipristis ? (serra ?).

Alopias : thanks. It is just the beginning

Coco

Here are your lowers

Attached Thumbnails

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[Coco]

Hi,

CARCHARHINIDAE



Young Galeocerdo cuvieri - Tiger shark


A big one



Negaprion brevirostris - Lemon shark

Coco

[Coco]

Hi,

CARCHARHINIDAE



Prionace glauca - Blue shark





Rhizoprionodon acutus - Milk shark

Coco

[RickNC]

Coco, on 07 December 2010 - 07:34 PM, said:

RickNC : do you have any pics of mako ?

Trilobite Guy : I am interested in recent selachian jaws to observe the multitude of sorts of teeth and their positions in a jaw.
My more expensive jaw is a big Galeocerdo cuvieri (112,50 € = 149,21 US$) I have bought for a friend, but I done a mistake with the price. I thus kept it for me. My less expensive jaws are the ones I prep myself (most of them are rays).

FossilForKids : your Hemipristis elongatus is nice. Do you have lower fossil teeth of Hemipristis ? (serra ?).

Alopias : thanks. It is just the beginning

Coco

Skulls Unlimited has some available. I thought about buying one. I have a small set of tiger shark jaws I got somewhere years ago.

[Coco]

Do you have any pics of your tiger shark jaws ?

I had a look on Skulls Illimited, it is written "We no longer accept shark jaws for cleaning"... Really, it is a special work to prep some selachian jaws.

Coco

[Raff]

A very interesting post and fantastic photos!

[RickNC]

Coco, on 21 December 2010 - 07:14 AM, said:

Do you have any pics of your tiger shark jaws ?

I had a look on Skulls Illimited, it is written "We no longer accept shark jaws for cleaning"... Really, it is a special work to prep some selachian jaws.

Coco

Here is the selection at SU. Most of theirs are replicas. The natural bone mako's are at the bottom of the page. I can get a pic of my small tiger here sometime soon:

http://www.skullsunl..._class.php?id=7