Stamp: Troodon inequalis (Canada 2016)
Troodon inequalis (Canada 2016)
26 May (Canada ) within release Prehistoric Canada (5th series), Dinosaurs goes into circulation Stamp Troodon inequalis face value P No Face Value
| Stamp Troodon inequalis in catalogues | |
|---|---|
| Stamp Number: | Sn:CA 2923a |
| Yvert et Tellier: | Yt:CA 3255 |
Stamp is square format.
Stamp from mini-sheet. P = 0.85Also in the issue Prehistoric Canada (5th series), Dinosaurs:
- Stamp - Troodon inequalis face value P;
- Stamp - Dimetrodon borealis face value P;
- Stamp - Comox Valley elasmosaur face value P;
- Stamp - Cypretherium coarctatum face value P;
- Stamp - Acrotholus audeti face value P;
- Stamp - Troodon inequalis face value P;
- Stamp - Cypretherium coarctatum face value P;
- Stamp - Dimetrodon borealis face value P;
- Stamp - Acrotholus audeti face value P;
- Stamp - Comox Valley elasmosaur face value P;
- Booklet - Dinos of Canada face value 10*P;
- Mini Sheet - Dinos of Canada face value 5*P;
- Stamp - Acrotholus audeti face value P;
- Stamp - Comox Valley elasmosaur face value P;
- Stamp - Cypretherium coarctatum face value P;
- Stamp - Dimetrodon borealis face value P;
- Stamp - Troodon inequalis face value P;
- Booklet Pane - Dinosaurs of Canada, booklet pane face value 10*P;
Stamp Troodon inequalis it reflects the thematic directions:
Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 mya and their dominance continued throughout the Jurassic and Cretaceous periods. The fossil record shows that birds are feathered dinosaurs, having evolved from earlier theropods during the Late Jurassic epoch, and are the only dinosaur lineage known to have survived the Cretaceous–Paleogene extinction event approximately 66 mya. Dinosaurs can therefore be divided into avian dinosaurs—birds—and the extinct non-avian dinosaurs, which are all dinosaurs other than birds.
Reptiles are tetrapod (four-limbed vertebrate) animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives. The study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology. Because some reptiles are more closely related to birds than they are to other reptiles (e.g., crocodiles are more closely related to birds than they are to lizards), the traditional groups of "reptiles" listed above do not together constitute a monophyletic grouping (or clade). For this reason, many modern scientists prefer to consider the birds part of Reptilia as well, thereby making Reptilia a monophyletic class.
