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The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
Japanese sawshark. The Japanese sawshark ( Pristiophorus japonicus) is a species of sawshark in the family Pristiophoridae. This shark has a long, narrow rostrum. Its first dorsal fin originates behind the tips of the pectoral fins, and its caudal fin is angled almost straight in line with the body. The Japanese sawshark reaches a maximum ...
The bonnethead (Sphyrna tiburo), also called a bonnet shark or shovelhead, [3] is a small member of the hammerhead shark genus Sphyrna, and part of the family Sphyrnidae.It is an abundant species in the littoral zone of the North Atlantic and the Gulf of Mexico, is the only shark species known to display sexual dimorphism in the morphology of the head, and is the only shark species known to be ...
TextTwist. All-star classic word games abound - TextTwist is the grandfather of them all! In TextTwist you get a set of letters and have to make as many words as you can with the letters provided ...
Squalicorax. Squalicorax, commonly known as the crow shark, is a genus of extinct lamniform shark known to have lived during the Cretaceous period. The genus had a global distribution in the Late Cretaceous epoch. Multiple species within this genus are considered to be wastebasket taxon due to morphological similarities in the teeth.
See Shark habitat maps on Commons for any distribution maps already made. A blank map edit your map from this. Distribution maps. The basic template map is the world map without country borders (Image:BlankMap-World-noborders.png) that can be found at Wikipedia:Blank maps.
The blacktip shark ( Carcharhinus limbatus) is a species of requiem shark, and part of the family Carcharhinidae. It is common to coastal tropical and subtropical waters around the world, including brackish habitats. Genetic analyses have revealed substantial variation within this species, with populations from the western Atlantic Ocean ...
File:White shark.jpg. Size of this preview: 800 × 557 pixels. Other resolutions: 320 × 223 pixels | 640 × 445 pixels | 1,024 × 713 pixels | 1,200 × 835 pixels. Original file (1,200 × 835 pixels, file size: 655 KB, MIME type: image/jpeg) This is a file from the Wikimedia Commons. Information from its is shown below.