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

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Scientific name Onchopristis numidus; Specimen: rare pathological double‑barbed rostral denticle of a Cretaceous sawfish; Geological period: Upper Cretaceous, Cenomanian stage (about 96 million years); Condition: natural; Authenticity: original/official.

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Description from the seller

科学名:Onchopristis numidus - Sawfish rostral tooth - 本物の異常形態または病理的な二端刺の denticleを伴う。

所在:モロッコ南部タウズ地区

地質層系:If ezouane Formation - KemKem Red Sandstone Beds

年代:白亜紀後期、センノマニアン層期(およそ9,600万年)

サイズ:9 cm

REF.: #J658

DESCRIPTION:

観察:Onchopristis numidus の所谓の「歯」は、実際には頭部の長い鋸状の吻に沿って側方に配置された修飾された吻端 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で比較的よく見られるが、二つの異なる先端または櫛状の刺を有する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記録されている。 O. numidus の異常 denticle の特定の研究では、後縁に少なくとも二つの刺を有する標本が記され、これは必ずしも別種を表すのではなく、Onchopristis numidus の異常または病理的形態であると結論づけられている。

著者らはまた、この種の通常の標本が Kem Kem 沈積層に豊富に存在するのに対し、これらの病理形態は時折しか現れないと指摘している。

以後の研究は、それらのまれさと真偽性についてさらなる証拠を提供している。多刺 denticles は断面検査とマイクロCT 技術を用いて検討された。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ものであることが判明し、別の真の二端刺 denticle は断面検査によって人工的改変の痕跡が見られなかった。これにより、この異常が真に 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正性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:いくつかの接着断片はあるが、深い検査の結果、この吻端歯は非常に特別で真のものであり、二重刺 denticle を示しており、人工的改変の痕跡は見られない。

私たちの化石にはすべて真偽証明書が付属する。毎週、発行された真偽証明書はウェブサイトのデータベース検証システム上で更新される。証明書がまだ更新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.

科学名:Onchopristis numidus - Sawfish rostral tooth - 本物の異常形態または病理的な二端刺の denticleを伴う。

所在:モロッコ南部タウズ地区

地質層系:If ezouane Formation - KemKem Red Sandstone Beds

年代:白亜紀後期、センノマニアン層期(およそ9,600万年)

サイズ:9 cm

REF.: #J658

DESCRIPTION:

観察:Onchopristis numidus の所谓の「歯」は、実際には頭部の長い鋸状の吻に沿って側方に配置された修飾された吻端 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で比較的よく見られるが、二つの異なる先端または櫛状の刺を有する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記録されている。 O. numidus の異常 denticle の特定の研究では、後縁に少なくとも二つの刺を有する標本が記され、これは必ずしも別種を表すのではなく、Onchopristis numidus の異常または病理的形態であると結論づけられている。

著者らはまた、この種の通常の標本が Kem Kem 沈積層に豊富に存在するのに対し、これらの病理形態は時折しか現れないと指摘している。

以後の研究は、それらのまれさと真偽性についてさらなる証拠を提供している。多刺 denticles は断面検査とマイクロCT 技術を用いて検討された。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ものであることが判明し、別の真の二端刺 denticle は断面検査によって人工的改変の痕跡が見られなかった。これにより、この異常が真に 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正性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:いくつかの接着断片はあるが、深い検査の結果、この吻端歯は非常に特別で真のものであり、二重刺 denticle を示しており、人工的改変の痕跡は見られない。

私たちの化石にはすべて真偽証明書が付属する。毎週、発行された真偽証明書はウェブサイトのデータベース検証システム上で更新される。証明書がまだ更新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
334
Objects sold
100%
protop

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