Stamp: Whale Shark (Rhincodon typus) (United Arab Emirates 2004)
Whale Shark (Rhincodon typus) (United Arab Emirates 2004)
26 September (United Arab Emirates ) within release Fauna goes into circulation Stamp Whale Shark (Rhincodon typus) face value 275 United Arab Emirates fils
| Stamp Whale Shark (Rhincodon typus) in catalogues | |
|---|---|
| WADP Numbering System - WNS: | WAD:AE016.04 |
Stamp is horizontal format.
Endangered Marine Creatures of the Arabian GulfAlso in the issue Fauna:
- Stamp - Indo-Pacific Finless Porpoise (Neophocaena phocaenoides) face value 50;
- Stamp - Comber (Serranus sp.) face value 175;
- Stamp - Whale Shark (Rhincodon typus) face value 275;
- Stamp - Dugong (Dugong dugon) face value 375;
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.
