Cthulhu2 Posted February 18, 2018 Share Posted February 18, 2018 Hey guys, silly question here. I was talking throughout the forum and wanted to know are Schreger lines only found in proboscidea? Link to comment Share on other sites More sharing options...
Miocene_Mason Posted February 18, 2018 Share Posted February 18, 2018 Speaking from little to no experience but I would assume other animals may have similar structures but they wouldn’t be called Schreger lines? “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
ynot Posted February 18, 2018 Share Posted February 18, 2018 45 minutes ago, Cthulhu2 said: are Schreger lines only found in proboscidea? Yes, only elephants and their relatives. 33 minutes ago, WhodamanHD said: t I would assume other animals may have similar structures but they wouldn’t be called Schreger lines? I know of no other ivory toothed animal that has schreger lines, or any similar features by other names. 2 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Miocene_Mason Posted February 18, 2018 Share Posted February 18, 2018 1 minute ago, ynot said: Yes, only elephants and their relatives. I know of no other ivory toothed animal that has schreger lines, or any similar features by other names. Don’t narwhals tusks have rings? Not really tusks or ivory I know, but superficially speaking. 1 “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
ynot Posted February 18, 2018 Share Posted February 18, 2018 Just now, WhodamanHD said: Don’t narwhals tusks have rings? Not really tusks or ivory I know, but superficially speaking. Schreger lines are not "rings", they are very different features of ivory teeth. Schreger lines are visual artifacts that are evident in the cross-sections of ivory. They are commonly referred to as cross-hatchings, engine turnings, or stacked chevrons. Schreger lines can be divided into two categories. The easily seen lines which are closest to the cementum are the outer Schreger lines. 4 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Miocene_Mason Posted February 18, 2018 Share Posted February 18, 2018 Thanks for that @ynot, looked it up and I can see the huge difference. Another day, another ignorant assumption dispelled 1 “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
doushantuo Posted February 18, 2018 Share Posted February 18, 2018 Osborn/Arch.Oral.Biol.,1965 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted February 18, 2018 Share Posted February 18, 2018 Schreger lines only occur in the Proboscidea, but Hunter-Schreger bands of a similar type of enamel prisms can be found in many placental mammals living and extinct. 6 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Seguidora-de-Isis Posted February 18, 2018 Share Posted February 18, 2018 Indeed the Schreger lines can only be found in the Proboscidea order of placental mammals, which today contains only one living family, ie the Elephantidae family. But the ivory of the present elephants do not have the Schreger lines, only the Hunter-Schreger, as for example, in the Indian elephant. As an example, I show here my fragment of mammoth ivory, which is deposited in my private collection, where the Schreger lines are quite visible: 3 Is It real, or it's not real, that's the question! Link to comment Share on other sites More sharing options...
Cthulhu2 Posted February 18, 2018 Author Share Posted February 18, 2018 13 hours ago, Seguidora-de-Isis said: Indeed the Schreger lines can only be found in the Proboscidea order of placental mammals, which today contains only one living family, ie the Elephantidae family. But the ivory of the present elephants do not have the Schreger lines, only the Hunter-Schreger, as for example, in the Indian elephant. As an example, I show here my fragment of mammoth ivory, which is deposited in my private collection, where the Schreger lines are quite visible: What a gorgeous piece! I appreciate the response. 2 Link to comment Share on other sites More sharing options...
JohnBrewer Posted February 18, 2018 Share Posted February 18, 2018 Violet has wondered about unicorns 1 John Map of UK fossil sites Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted February 18, 2018 Share Posted February 18, 2018 5 minutes ago, JohnBrewer said: Violet has wondered about unicorns Here are some unicorn horns found in Utrecht and now on display in the Rijksmuseum. Looks possible they do, but we'd have to ask the museum for a cross section. 4 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
JohnBrewer Posted February 18, 2018 Share Posted February 18, 2018 Just now, Tidgy's Dad said: Here are some unicorn horns found in Utrecht and now on display in the Rijksmuseum. Looks possible they do, but we'd have to ask the museum for a cross section. I’ll show her the picture in the morning Adam! 1 John Map of UK fossil sites Link to comment Share on other sites More sharing options...
smokeriderdon Posted February 19, 2018 Share Posted February 19, 2018 I had no clue about this stuff. Thank you guys for the learnin. I grabbed my portion of tusk from Leisey shell pit, but they are not visible on my piece. Link to comment Share on other sites More sharing options...
ynot Posted February 19, 2018 Share Posted February 19, 2018 50 minutes ago, smokeriderdon said: I grabbed my portion of tusk from Leisey shell pit, Where is this? 51 minutes ago, smokeriderdon said: they are not visible on my piece. May be something other than Proboscidea, or it may need a clean polished cut. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
doushantuo Posted February 19, 2018 Share Posted February 19, 2018 back to the roots(*AHEM,cough*_) Link to comment Share on other sites More sharing options...
smokeriderdon Posted February 20, 2018 Share Posted February 20, 2018 ynot, it is in central Florida. Not active anymore I believe. Early Pleistocene stuff. Relatively sure it is mammoth. I think if I did polish it at all, they would likely show up. Just not wanting to do to this piece. Link to comment Share on other sites More sharing options...
ynot Posted February 20, 2018 Share Posted February 20, 2018 1 hour ago, smokeriderdon said: ynot, it is in central Florida. Not active anymore I believe. Early Pleistocene stuff. Relatively sure it is mammoth. I think if I did polish it at all, they would likely show up. Just not wanting to do to this piece. You may be able to see them with some magnification. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
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