This issue was originally scheduled to be issued in 2012, the centenary of the publication Sir Arthur Conan Doyle’s dinosaur thriller, The Lost World. Happily for Royal Mail there is another tie-in this year, as the BBC's 3D movie, Walking with Dinosaurs, will launch at cinemas on 20 December, just in time for the Christmas audiences. (See the trailer here.)
The stamps feature details of the creatures that break out of the standard stamp frame. They are printed over two sheets allowing for vertical strips of five.
From the top (better pictures have now been added to the webpage for this issue, together with the special postmark.)
Sheet 1: Polacanthus, Icthyosaurus, Iguanadon, Ornithocheirus, Baryonyx
Sheet 2: Dimorophodon, Hypsilophodon, Cetiosaurus, Megalosaurus, Plesiosaurus
Polacanthus, deriving its name from the Ancient Greek polys-/πολύς- "many" and akantha/ἄκανθα "thorn" or "prickle", is an early armored, spiked, plant-eating ankylosaurian dinosaur from the early Cretaceous period of England. Wikipedia
Ichthyosaurus is a genus of ichthyosaurs from the early Jurassic of Europe. It is among the best known ichthyosaur genera, with the Order Ichthyosauria being named after it. Wikipedia
Iguanodon is a genus of ornithopod dinosaur that existed roughly halfway between the first of the swift bipedal hypsilophodontids of the mid-Jurassic and the ornithopods' culmination in the duck-billed dinosaurs of the late Cretaceous. Wikipedia
Ornithocheirus is a pterosaur genus known from fragmentary fossil remains uncovered from sediments in the UK. Wikipedia
Baryonyx is a genus of carnivorous saurischian dinosaur first discovered in clay pits just south of Dorking, England, and later reported from fossils found in northern Spain and Portugal. It is known to contain only one species, Baryonyx walkeri. Wikipedia
Dimorphodon was a genus of medium-sized pterosaur from the early Jurassic Period. It was named by paleontologist Richard Owen in 1859. Wikipedia
Hypsilophodon is an ornithopod dinosaur genus from the Early Cretaceous period of England. The first remains of Hypsilophodon were found in 1849 and in 1869 the type species Hypsilophodon foxii was named. Wikipedia
Cetiosaurus meaning 'whale lizard', from the Greek keteios/κήτειος meaning 'sea monster' and sauros/σαυρος meaning 'lizard', is a herbivorous sauropod dinosaur from the Late Jurassic Period, living about 167 million years ago in what is now Europe. Wikipedia
Megalosaurus is a genus of large meat-eating theropod dinosaurs of the Middle Jurassic period of Europe. It is significant as the first genus of ancient dinosaur to be described and named. Wikipedia
Plesiosaurus was a genus of large marine sauropterygian reptile that lived during the early part of the Jurassic Period, and is known by nearly complete skeletons from the Lias of England. Wikipedia
Designed by Why Not Associates, illustrator John Sibbick, printed by Walsall Security Print in gravure.