卓越した巨大なメガロサウリダ科の歯 cf. Afrovenator 肉食竜 ジュラ紀中期 - 化石歯
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Scientific name: Theropod Dinosaur Tooth - Megalosaurid cf Afrovenator abakensis; Specimen: Outstanding Huge Megalosaurid cf Afrovenator Theropod Dinosaur Tooth - Middle Jurassic; Geological period: Middle Jurassic, Bathonian stage (167 million years); Condition: Natural; Authenticity: Original/official.
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Description from the seller
科学名：Theropod Dinosaur Tooth - Megalosaurid cf Afrovenator abakensis
場所：Tiouraren Hill，Téneré Desert，ニジェール。
地質構成：Tiouraren層系
年代：中生代ジュラ紀，バソニアン階（約1億6700万年）
サイズ：6,3 cm
REF.: #J678
DESCRIPTION:
Outstanding huge megalosaurid dinosaur tooth. The specimen have few glued and filled gap fractures on one side. Its anyway a truly outstanding large tooth.
すべての標本には真証明書が付属します。毎週、発行された真証明書は当社のウェブサイト上のデータベース検証システムで更新されます。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。ディスプレイボックスをご同梱。
Afrovenatorと形態的に適合する孤立歯もあり得ますが、孤立した冠を自信をもってAfrovenator—特にAfrovenator abakensis種—に割り当てるには慎重さを要します。
Theropodの歯は比較的単純な解剖学的構造であり、多くの無関係な捕食竜は独立して類似の外側に圧縮された、曲折し鋸状の冠を発達させました。この歯のホモプラシー現象により、表面的に似た歯の形態が遠縁の肉食竜系統で見られることがあります。現代の研究では、孤立した theropod の歯は、 genus や species レベルよりも、広い家族レベルまたは形態型レベルで特定する方が容易であることが強調されています。
さらに、同一個体内の異顎性も困難さを増します。歯の形態は前口骨列・上顎・下顎の歯列に沿って著しく変化することがあります。冠の曲率、基部断面、唇舌方向の圧縮、歯の鋸齿の密度、冠端の位置、特定のエナメル特徴の発達などは歯位に応じて変わることがあります。そのため、同じ個体に属する2本の歯でも、時に驚くほど異なる外観に見えることがあります。
発生的変異、個体差、歯の摩耗、保存の不完全さ、エナメル質と顎歯のエロージョン、化石化中の変形などがさらなる不確実性を生み出します。冠高、冠底長、冠底幅、冠底比、曲率、近心・遠心歯数、カリナの相対的発達などの測定値は、単一の形態的特徴よりも総合的に評価した方が有意に情報量が多くなります。定量的・多変量アプローチは、孤立した theropod の歯を評価する際の重要な道具となっています。
このため、Tiourarén層の歯形態が期待される孤立歯は、特定の診断比較と強い層位・産地データが、より正確な帰属を示す証拠を提供する場合を除き、望ましくは「cf. Afrovenator」または「Afrovenator似」「Afrovenatorと形態的に一致する theropod歯」などの表現で記述されるべきです。
孤立歯だけを Afrovenator abakensis に具体的に割り当てることは、種の同定というよりも分類上の解釈とみなすべきです。共伴する頭蓋骨や骨格資料は、歯の形態だけではなく種レベルの同定に対してはるかに強力な根拠を提供します。
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：Theropod Dinosaur Tooth - Megalosaurid cf Afrovenator abakensis
場所：Tiouraren Hill，Téneré Desert，ニジェール。
地質構成：Tiouraren層系
年代：中生代ジュラ紀，バソニアン階（約1億6700万年）
サイズ：6,3 cm
REF.: #J678
DESCRIPTION:
Outstanding huge megalosaurid dinosaur tooth. The specimen have few glued and filled gap fractures on one side. Its anyway a truly outstanding large tooth.
すべての標本には真証明書が付属します。毎週、発行された真証明書は当社のウェブサイト上のデータベース検証システムで更新されます。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。ディスプレイボックスをご同梱。
Afrovenatorと形態的に適合する孤立歯もあり得ますが、孤立した冠を自信をもってAfrovenator—特にAfrovenator abakensis種—に割り当てるには慎重さを要します。
Theropodの歯は比較的単純な解剖学的構造であり、多くの無関係な捕食竜は独立して類似の外側に圧縮された、曲折し鋸状の冠を発達させました。この歯のホモプラシー現象により、表面的に似た歯の形態が遠縁の肉食竜系統で見られることがあります。現代の研究では、孤立した theropod の歯は、 genus や species レベルよりも、広い家族レベルまたは形態型レベルで特定する方が容易であることが強調されています。
さらに、同一個体内の異顎性も困難さを増します。歯の形態は前口骨列・上顎・下顎の歯列に沿って著しく変化することがあります。冠の曲率、基部断面、唇舌方向の圧縮、歯の鋸齿の密度、冠端の位置、特定のエナメル特徴の発達などは歯位に応じて変わることがあります。そのため、同じ個体に属する2本の歯でも、時に驚くほど異なる外観に見えることがあります。
発生的変異、個体差、歯の摩耗、保存の不完全さ、エナメル質と顎歯のエロージョン、化石化中の変形などがさらなる不確実性を生み出します。冠高、冠底長、冠底幅、冠底比、曲率、近心・遠心歯数、カリナの相対的発達などの測定値は、単一の形態的特徴よりも総合的に評価した方が有意に情報量が多くなります。定量的・多変量アプローチは、孤立した theropod の歯を評価する際の重要な道具となっています。
このため、Tiourarén層の歯形態が期待される孤立歯は、特定の診断比較と強い層位・産地データが、より正確な帰属を示す証拠を提供する場合を除き、望ましくは「cf. Afrovenator」または「Afrovenator似」「Afrovenatorと形態的に一致する theropod歯」などの表現で記述されるべきです。
孤立歯だけを Afrovenator abakensis に具体的に割り当てることは、種の同定というよりも分類上の解釈とみなすべきです。共伴する頭蓋骨や骨格資料は、歯の形態だけではなく種レベルの同定に対してはるかに強力な根拠を提供します。
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
Outstanding Huge Megalosaurid cf Afrovenator Theropod Dinosaur Tooth - Middle Jurassic
地質年代
Middle Jurassic, Bathonian stage ( 167 million years)
コンディション
Natural
Authenticity
Original/official
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