Stamp: Caribbean Sharpnose Shark (Rhizoprionodon porosus) (Antigua and Barbuda 2010)
Caribbean Sharpnose Shark (Rhizoprionodon porosus) (Antigua and Barbuda 2010)
14 April (Antigua and Barbuda ) within release Sharks goes into circulation Stamp Caribbean Sharpnose Shark (Rhizoprionodon porosus) face value 2.75 East Caribbean dollar
| Stamp Caribbean Sharpnose Shark (Rhizoprionodon porosus) in catalogues | |
|---|---|
| Stamp Number: | Sn: AG 3094a |
Stamp is square format.
Also in the issue Sharks:
- Stamp - Caribbean Reef Shark (Carcharhinus perezi) face value 1.80;
- Stamp - Whale Shark (Rhincodon typus) face value 5;
- Stamp - Oceanic Whitetip Shark (Carcharhinus longimanus) face value 2.75;
- Stamp - Nurse Shark (Ginglymostoma cirratum) face value 1.20;
- Stamp - Caribbean Sharpnose Shark (Rhizoprionodon porosus) face value 2.75;
- Stamp - Bull Shark (Carcharhinus leucas) face value 2.75;
- Stamp - Blacktip Shark (Carcharhinus limbatus) face value 2.75;
- Mini Sheet - Sharks face value 4*2.75;
- Stamp - Tiger Shark (Galeocerdo cuvier) face value 3;
Stamp Caribbean Sharpnose Shark (Rhizoprionodon porosus) it reflects the thematic directions:
Animals are multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). All animals are motile, meaning they can move spontaneously and independently, at some point in their lives. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their lives. All animals are heterotrophs: they must ingest other organisms or their products for sustenance.
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.
