刃齿虎 (剑齿虎)

📖 1. 概览

拥有匕首般修长上犬齿的新生代美洲大型猫科掠食者。体长约1.75米，肩高约1米，体型与现代狮子相近，但体格更为粗壮。（同属最大物种 S. populator 的犬齿可长到约28厘米。）

🌐 Wikipedia 摘要摘录

Smilodon is a genus of extinct felids. It is one of the best-known saber-toothed predators and prehistoric mammals. Although commonly known as the saber-toothed tiger, it was not closely related to the tiger or other modern cats, belonging to the extinct subfamily Machairodontinae, with an estimated date of divergence from the ancestor of living cats around 20 million years ago. Smilodon was one of the last surviving machairodonts alongside Homotherium. Smilodon lived in the Americas during the Pleistocene to early Holocene epoch. The genus was named in 1842 based on fossils from Brazil; the generic name means 'scalpel' or 'two-edged knife' combined with 'tooth'. Three species are recognized today: S. gracilis, S. fatalis, and S. populator. The two latter species were probably descended from S. gracilis, which itself probably evolved from Megantereon. The hundreds of specimens obtained from the La Brea Tar Pits in Los Angeles constitute the largest collection of Smilodon fossils.

🦴 2. 身体结构与特征

它用熊一般强壮的前肢肌肉制服大型食草动物后，将嘴张开到120度咬断猎物的颈动脉。

🔍 3. 化石记录与古生态

在美国洛杉矶拉布雷亚沥青坑中发掘出超过2,000个个体的骨骼，是研究最深入的化石哺乳动物之一。

🇰🇷 4. 与韩国的关联

它是研究新生代食肉目掠食者演化的核心化石物种。