希少な病理学的特徴をもつ、Onchopristis numidus の双鋭吻部棘歯 ― 白亜紀のノコギリザメ - 化石歯 (No reserve price)

03
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19
hours
42
minutes
11
seconds
Current bid
€ 20
No reserve price
Manuel Quiring
Expert
Estimate € 280 - € 350
GB
€20

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Description from the seller

学名: Onshopristis numidus - サメ牙の口吻歯(サーベルサメの歯牙)- 本物の aberrant または 病理的な二重刺 denticle を伴う。

所在地点: タウーズ, 南部モロッコ

地質層: Ifezouane Formation - Kem Kem Red Sandstone Beds

年代: 上部白亜紀、セノマニアン期(推定 9600万年)

サイズ: 9 cm

REF.: #J658

DESCRIPTION:

観察: Onchopristis numidus の所谓の「歯」は実際には口吻に沿って側方に並んだ改変された rostral denticles である。これらの要素は北アフリカの白亜紀層、特にモロッコの Kem Kem Beds で比較的一般的だが、二つの異なる先端または刺を示す異常形態を示す標本はかなり稀である。

この異常の重要性は科学的に文献化されている。 O. numidus denticles の異常形態を特定 studied し、後方縁に少なくとも二つの刺を有する標本を記述した研究は、必ずしも別種を意味するものではなく、 Onchopristis numidus の異常形態または病的形態であると結論づけている。

著者らはまた、この種の正常な化石が Kem Kem 褶層で豊富に見られるのに対し、これらの病的形態はごく稀にしか出現しないことを指摘している。

その後の研究は、それらの希少性と真偽性についてさらなる証拠を提供している。多刺 denticles は断面法およびマイクロCT で検討された。あるケースでは、標本が異なる個体の部品をつなぎ合わせて操作されたことが判明し、別の真の二重刺 denticle は断面化され、人工的改変の痕跡がないことが示された。これにより、異常は実際に O. numidus に生じたものであることが確認され、同時に収集家に提供される卓越標本の真贋を慎重に検証する重要性が強調されている。

私たちの標本について: 一部接着剤で修復された亀裂があるが、綿密な検査の結果、この rostral tooth は非常に特別で本物であり、二重刺 denticle を示しており、人工的改変の証拠はないと結論づけられた。

すべての化石には真正証明書(Certificate of Authenticity)が付属します。毎週、発行された真正証明書はウェブサイトのデータベース検証システムで更新されます。証明書の更新がまだ反映されていない場合はご連絡ください。すぐに更新します。表示ボックスは付属していません。

Seller's Story

Jurassic Dreams is the world's largest online dinosaur fossils store, unrivaled as the most reputable source for authentic fossil specimens. We are the only leading online fossils store owned by an accredited geologist and paleontology expert. In addition, we have extraordinary authentic meteorites specimens from all over the universe. With dozens of different specimens in stock... our customers come back time and again. Because, simply put, our lifetime guarantee is unbeatable. My name is Juan A. Poblador and I have a strong academic background in Paleontology and Geology from the University of Madrid and University of Alicante. I have participated in fossil excavation projects in several locations mainly in Europe and Africa for over 10 years. Writing scientifically accurate descriptions of every specimen is one of the tasks that consume most of my time. Obviously, recognizing fake and restored fossils is second nature to me. So you can be sure that every fossil in this website has been carefully screened and inspected by me. I have served collectors and fossil enthusiasts over the years. I have also supplied museums and institutions. I combine the study and research of significant specimens with exhibiting and selling the many other finds, which helps fund the new expeditions. Additionally, I have a small team of support staff for logistics. I've personally trained them to handle and pack the fossils properly so that they can be shipped within 24 hours and arrive at your door in one piece. Last but not least, I'm fortunate to have a great network of other seasoned paleontologists with whom I discuss the rarest items, new discoveries, and exploration trips to remote quarries... If I don't know something, the paleontological community really helps out. I like to manage Jurassic Dreams as a well curated online exhibition of museum grade pieces. I'm a collector myself and I love to share the knowledge with other fellow collectors. That's why I will respond to any email when you have any doubt or when you buy, and you'll have a personalized fossil selection experience. Jurassic Dreams a proud member of the Association of Applied Paleontological Sciences (AAPS) and abide by its Code of Ethics. The Association of Applied Paleontological Sciences conforms to the recommendations of The National Academy of Sciences Report on Paleontological Collecting and standard business practices and ethics. In addition, we are the certified member #5681 of the International Meteorite Collectors Association (IMCA) and a certified member of GMA (Global Meteorite Association) G0043. IMCA and GMA are the most prestigious associations helping meteorite collectors in their search for Authentic Meteorites for their collections and assisting others in helping to learn more about meteorites. A physical certificate of authenticity is provided free of charge with every fossil we sell. This is our lifetime guarantee. The certificate, individually prepared for each fossil by Juan A. Poblador, an expert paleontologist, contains an accurate scientific description, and the certificate's validity can be verified online at all times. In addition, a 100% money-back guarantee is provided.

学名: Onshopristis numidus - サメ牙の口吻歯(サーベルサメの歯牙)- 本物の aberrant または 病理的な二重刺 denticle を伴う。

所在地点: タウーズ, 南部モロッコ

地質層: Ifezouane Formation - Kem Kem Red Sandstone Beds

年代: 上部白亜紀、セノマニアン期(推定 9600万年)

サイズ: 9 cm

REF.: #J658

DESCRIPTION:

観察: Onchopristis numidus の所谓の「歯」は実際には口吻に沿って側方に並んだ改変された rostral denticles である。これらの要素は北アフリカの白亜紀層、特にモロッコの Kem Kem Beds で比較的一般的だが、二つの異なる先端または刺を示す異常形態を示す標本はかなり稀である。

この異常の重要性は科学的に文献化されている。 O. numidus denticles の異常形態を特定 studied し、後方縁に少なくとも二つの刺を有する標本を記述した研究は、必ずしも別種を意味するものではなく、 Onchopristis numidus の異常形態または病的形態であると結論づけている。

著者らはまた、この種の正常な化石が Kem Kem 褶層で豊富に見られるのに対し、これらの病的形態はごく稀にしか出現しないことを指摘している。

その後の研究は、それらの希少性と真偽性についてさらなる証拠を提供している。多刺 denticles は断面法およびマイクロCT で検討された。あるケースでは、標本が異なる個体の部品をつなぎ合わせて操作されたことが判明し、別の真の二重刺 denticle は断面化され、人工的改変の痕跡がないことが示された。これにより、異常は実際に O. numidus に生じたものであることが確認され、同時に収集家に提供される卓越標本の真贋を慎重に検証する重要性が強調されている。

私たちの標本について: 一部接着剤で修復された亀裂があるが、綿密な検査の結果、この rostral tooth は非常に特別で本物であり、二重刺 denticle を示しており、人工的改変の証拠はないと結論づけられた。

すべての化石には真正証明書(Certificate of Authenticity)が付属します。毎週、発行された真正証明書はウェブサイトのデータベース検証システムで更新されます。証明書の更新がまだ反映されていない場合はご連絡ください。すぐに更新します。表示ボックスは付属していません。

Seller's Story

Jurassic Dreams is the world's largest online dinosaur fossils store, unrivaled as the most reputable source for authentic fossil specimens. We are the only leading online fossils store owned by an accredited geologist and paleontology expert. In addition, we have extraordinary authentic meteorites specimens from all over the universe. With dozens of different specimens in stock... our customers come back time and again. Because, simply put, our lifetime guarantee is unbeatable. My name is Juan A. Poblador and I have a strong academic background in Paleontology and Geology from the University of Madrid and University of Alicante. I have participated in fossil excavation projects in several locations mainly in Europe and Africa for over 10 years. Writing scientifically accurate descriptions of every specimen is one of the tasks that consume most of my time. Obviously, recognizing fake and restored fossils is second nature to me. So you can be sure that every fossil in this website has been carefully screened and inspected by me. I have served collectors and fossil enthusiasts over the years. I have also supplied museums and institutions. I combine the study and research of significant specimens with exhibiting and selling the many other finds, which helps fund the new expeditions. Additionally, I have a small team of support staff for logistics. I've personally trained them to handle and pack the fossils properly so that they can be shipped within 24 hours and arrive at your door in one piece. Last but not least, I'm fortunate to have a great network of other seasoned paleontologists with whom I discuss the rarest items, new discoveries, and exploration trips to remote quarries... If I don't know something, the paleontological community really helps out. I like to manage Jurassic Dreams as a well curated online exhibition of museum grade pieces. I'm a collector myself and I love to share the knowledge with other fellow collectors. That's why I will respond to any email when you have any doubt or when you buy, and you'll have a personalized fossil selection experience. Jurassic Dreams a proud member of the Association of Applied Paleontological Sciences (AAPS) and abide by its Code of Ethics. The Association of Applied Paleontological Sciences conforms to the recommendations of The National Academy of Sciences Report on Paleontological Collecting and standard business practices and ethics. In addition, we are the certified member #5681 of the International Meteorite Collectors Association (IMCA) and a certified member of GMA (Global Meteorite Association) G0043. IMCA and GMA are the most prestigious associations helping meteorite collectors in their search for Authentic Meteorites for their collections and assisting others in helping to learn more about meteorites. A physical certificate of authenticity is provided free of charge with every fossil we sell. This is our lifetime guarantee. The certificate, individually prepared for each fossil by Juan A. Poblador, an expert paleontologist, contains an accurate scientific description, and the certificate's validity can be verified online at all times. In addition, a 100% money-back guarantee is provided.

Details

標本
Rare pathological double-barbed rostral denticle of Onchopristis numidus - Cretaceous Sawfish
地質年代
Upper Cretaceous, Cenomanian stage ( 96 million years)
コンディション
Natural
Authenticity
Original/official
スペインVerified
426
Objects sold
100%
protop

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