Stamp: Whale Shark (Rhincodon typus) (Cambodia 2021)
Whale Shark (Rhincodon typus) (Cambodia 2021)
28 December (Cambodia ) within release Fish of Cambodia (2021) goes into circulation Stamp Whale Shark (Rhincodon typus) face value 6,000 Cambodian riel
| Stamp Whale Shark (Rhincodon typus) in catalogues | |
|---|---|
| Colnect codes: | Col: KH 2021-07SS1a |
Stamp is square format.
stamp from souvenir sheetAlso in the issue Fish of Cambodia (2021):
- Stamp - Antennae Lionfish (Pterois antennata) face value 3,000;
- Stamp - False Clownfish (Amphiprion ocellaris) face value 2,000;
- Stamp - Giant Moray (Gymnothorax javanicus) face value 4,000;
- Stamp - Orange-Cheeked Papeigen (Cetoscarus ocellatus) face value 800;
- Stamp - Puffer Fish (Tetraodontidae sp) face value 500;
- Stamp - Sharphead Puffer (Canthigasterinae sp) face value 6,000;
- Souvenir Sheet - Sharphead Puffer (Canthigasterinae sp) face value 6,000;
- Souvenir Sheet - Whale Shark (Rhincodon typus) face value 6,000;
- Stamp - Whale Shark (Rhincodon typus) face value 6,000;
Stamp Whale Shark (Rhincodon typus) it reflects the thematic directions:
Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the Batoidea (rays and kin). Some sources extend the term "shark" as an informal category including extinct members of Chondrichthyes (cartilaginous fish) with a shark-like morphology, such as hybodonts. Shark-like chondrichthyans such as Cladoselache and Doliodus first appeared in the Devonian Period (419–359 million years), though some fossilized chondrichthyan-like scales are as old as the Late Ordovician (458–444 million years ago). The earliest confirmed modern sharks (selachimorphs) are known from the Early Jurassic around 200 million years ago, with the oldest known member being Agaleus, though records of true sharks may extend back as far as the Permian.
