パラサウロロフス

📖 1. 概要

頭の後ろへ長く伸びた中空の管状のトサカで、トロンボーンのような共鳴音を出して意思疎通していたカモノハシ恐竜です。

🌐 Wikipedia 要約抜粋

Parasaurolophus is a genus of hadrosaurid "duck-billed" dinosaur that lived in what is now western North America and possibly Asia during the Late Cretaceous period, about 76.5–73 million years ago. It was a large herbivore that could reach over 9 metres (30 ft) long and weigh over 5 metric tons, and were able to move as a biped and a quadruped. Three species are universally recognized: P. walkeri, P. tubicen, and the short-crested P. cyrtocristatus. Additionally, a fourth species, P. jiayinensis, has been proposed, although it is more commonly placed in the separate genus Charonosaurus. Remains are known from Alberta, New Mexico, and Utah, as well as possibly Heilongjiang if Charonosaurus is in fact part of the genus. The genus was first described in 1922 by William Parks from a skull and partial skeleton found in Alberta.

🦴 2. 体の構造と特徴

数百本の歯が噛み合ったデンタルバッテリー（歯群、Dental battery）で硬い植物をすり潰して食べていました。

🔍 3. 化石記録と古生態

頭骨のCTスキャンを通じて、実際の共鳴音の周波数が科学的に復元されました。

🇰🇷 4. 韓国との関わり

朝鮮半島南海岸の白亜紀地層で最もよく発見される鳥脚類の足跡の代表格です。