Spinosaurus by Issei Yoshino

Diagrams in Issei Super Complex Origami by Issei Yoshino
Diagrams in Origami Tanteidan Magazine 30
Diagrams in Origami Tanteidan Magazine 31
Folded from a square of Elephant-Hide paper

Spinosaurus by John Montroll

Diagrams in Dinosaur Origami by John Montroll
Folded from a square of origami paper

Spinosaurus by Matsuno Yukihiko

Diagrams in NOA Magazine 310
Folded from a square of Golden River Leather paper

Spinosaurus by Takai Hiroaki

Diagrams in 10 Origami Dinosaurs by Takai Hiroaki
Diagrams in Tanteidan 8th convention
Folded from a square of mulberry paper

Spinosaurus by Yamada Katsuhisa

Diagrams in Origami Dinosaurs by Yamada Katsuhisa
Folded from a square of "Slab" scrapbooking paper