Personalized Pterodactyl Text White Background Youth Long Sleeve T-Shirt. An image of a pterodactyl with decorative pterodactyl text against a white background is a unique paleontology gift design for paleontologists, science and dinosaur lovers. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)