Pliosaur (†Liopleurodon pachydeirus)

This was the biggest plesiosauria predator at a full length of 25 meters. The head of an adult was up to 5 meters long.

Superdomain: Neomura
Domain: Eukaryota
(unranked): Opisthokonta
(unranked) Holozoa
(unranked) Filozoa
Kingdom: Animalia
Subkingdom: Eumetazoa
(unranked): Bilateria
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Superclass: Tetrapoda
Class: Reptilia
Clade: Eureptilia
Clade: Romeriida
Clade: Diapsida
Clade: Neodiapsida
Clade: Sauria
Clade: Pantestudines
Superorder: †Sauropterygia
(unranked): †Eusauropterygia
Order: †Plesiosauria
Suborder: †Pliosauroidea
Family: †Pliosauridae
Clade: †Thalassophonea
Genus: †Liopleurodon
Species: L. pachydeirus

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