アロサウルス

📖 1. 概要

ジュラ紀後期の北アメリカ生態系における頂点捕食者で、「ジュラ紀のライオン」と呼ばれます。

🌐 Wikipedia 要約抜粋

Allosaurus is a genus of theropod dinosaur that lived 155 to 143 million years ago during the late Jurassic period. The first fossil remains that could definitively be ascribed to this genus were described in 1877 by Othniel C. Marsh. The name "Allosaurus" means "different lizard", alluding to its lightweight vertebrae, which Marsh believed were unique. The genus has a very complicated taxonomy and includes at least three valid species, the best known of which is A. fragilis. The bulk of Allosaurus remains come from North America's Morrison Formation, with material also known from the Alcobaça, Bombarral, and Lourinhã formations in Portugal. It was known for over half of the 20th century as Antrodemus, but a study of the abundant remains from the Cleveland-Lloyd Dinosaur Quarry returned the name "Allosaurus" to prominence. As one of the first well-known theropod dinosaurs, it has long attracted attention outside of paleontological circles.

🦴 2. 体の構造と特徴

顎を90度近くまで大きく開いて斧のように振り下ろす打撃狩猟法と、強力な3本指の鉤爪を持つ前脚を活用していました。

🔍 3. 化石記録と古生態

ステゴサウルスと死闘を繰り広げた痕跡が残る化石が多数発見されています。

🇰🇷 4. 韓国との関わり

国立果川科学館など韓国内の主要な自然史博物館における代表的な展示骨格です。