Heptranchias perlo Hexanchus griseus Hexanchus vitulus Notorynchus cepedianus Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria Placozoa Subregnum Bilateria Acoelomorpha Orthonectida Rhombozoa Myxozoa Superphylum Deuterostomia Chordata (vertebrates, etc. ... Typical Classes Subphylum Urochordata - Tunicates Ascideiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Orders see text The Chondrichthyes or cartilaginous fishes are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage. ... Families Chlamydoselachidae (frilled shark) Hexanchidae (cow sharks) Hexanchiformes is the order consisting of the most primitive types of sharks, and numbering just a handful of species. ... John Edward Gray (February 12, 1800 - March 7, 1875) was a British zoologist. ...
Cow sharks are a family (Hexanchidae) of sharks charatcterized by extra pairs of gill slits. Orders Hexanchiformes Squaliformes Pristiophoriformes Squatiniformes Heterodontiformes Orectolobiformes Carcharhiniformes Lamniformes Sharks are a group (superorder Selachimorpha) of fish, with a full cartilaginous skeleton, a streamlined body plan with between 5 and 7 gill slits along the sides (most often) or side of the head (the first modified slit is behind the...
The Broadnose Sevengill Shark (Notorynchus cepedianus) belongs to the Hexanchidae family and is recognizable because of its 7 gill slits, while most shark species have 5 gill slits (with the exception of its larger relative the Bluntnose Sixgill Shark). ...
Shark eyes are similar to the eyes of other vertebrates, including similar lenses, corneas and retinas, though their eyesight is well adapted to their marine environment with the help of a tissue called tapetum lucidum.
Sharks include everything from the hand-sized pygmy shark, Euprotomicrus bispinatus, a deep sea species, to the whale shark, Rhincodon typus, which is known to grow to a maximum length of approximately 15 metres (49 feet) and which, like the great whales, feeds only on plankton.
Sharks are often killed for shark fin soup, in which many sharks are hunted for their fins, which are cut off with a hot metal blade before the live animal is tossed back into the water.
The cigar shark is also known as the cookiecutter shark (due to its color and shape), the luminous shark (because it emits a green glow from its belly), and the Brazilian shark.
The cowshark (Notorynchus cepedianus), also known as the broadnose sevengill shark, the broad snout shark, the ground shark, and the spotted sevengill shark,is a distinctive and rare shark that has seven gills (most sharks have five).
Pseudocarcharias kamoharai is a widespread bottom-dwelling Lamniformes (or mackerel shark).
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