Reconstruction of Liopleurodon ferox （圖片來源：DiBgd，採用  CC BY-SA 4.0  授權） Age Jurassic（Callovian-Kimmeridgian） 166-155 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Order: Plesiosauria Family: Pliosauridae Clade: Thalassophonea Genus: Liopleurodon Species: Liopleurodon ferox Morphological description Liopleurodon ferox  is a pliosaurid (Pliosauridae) short-necked plesiosaur characterized by a reduced cervical region, a robust trunk, and limbs fully modified in

Reconstruction of Atopodentatus unicus （圖片來源：Spinosaurid，採用 CC BY-SA 4.0  授權） Age Triassic（Anisian） 247.2-242 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Sauropterygia Genus: Atopodentatus Species: Atopodentatus unicus Morphological description The snout of Atopodentatus unicus  is dorsoventrally flattened and expanded laterally into a hammerhead-like structure, with symmetrical transverse projections formed by both the upper and lower jaws. B