My son's recent interest in dinosaurs led me to revisit some of Kawahata's early dinosaur designs. In particular, his base for a number of dinosaurs that starts with a double kite base, seemed to have a lot of potential. (Montroll also used this base in Prehistoric Origami.)
Starting from that base, I came up with this series of dinosaurs. Each one is folded from the same sized sheet of paper. One major departure from the original base is the closed-back and locked belly design.