棘龙

📖 1. 概览

体长最大可达15m，是已知所有肉食恐龙中体长最长的半水生兽脚类，背部高耸着1.65m高的背帆（Sail）。

🌐 Wikipedia 摘要摘录

Spinosaurus is a genus of large spinosaurid theropod dinosaurs that lived in what is now North Africa during the Cenomanian age of the Late Cretaceous period, about 100 to 94 million years ago. The genus was known first from Egyptian remains discovered in 1912 and described by German palaeontologist Ernst Stromer in 1915. The original remains were destroyed in World War II, but additional material came to light in the early 21st century. It is unclear whether one or two species are represented in the fossils reported in the scientific literature. The type species, S. aegyptiacus, is mainly known from the Bahariya Formation in Egypt and the Kem Kem beds in Morocco. The other species, S. mirabilis, is known from the Farak Formation in Niger. Possible junior synonyms include Sigilmassasaurus and the dubious S. maroccanus from the Kem Kem beds and Oxalaia from the Alcântara Formation in Brazil, though the distinction and validity of these taxa have been debated.

🦴 2. 身体结构与特征

它利用似鳄长吻前端的水压感知神经孔，以及如蝾螈般上下宽扁的鳍状推进尾来猎食巨型鱼类。

🔍 3. 化石记录与古生态

2020年在摩洛哥发掘出的完整尾部骨骼化石，证实了其适应水中游泳的特征。

🇰🇷 4. 与韩国的关联

在庆尚南道河东郡早白垩世地层中，曾发现棘龙类谱系的圆锥形牙齿化石。