Sharks The Animal Answer Guide
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What is this book about? This book is about chondrichthyan fishes (chondros + ichthys, literally “cartilaginous fishes”), a term ...
2 Sharks: The Animal Answer Guide ras) have evolved during their 400-million-year history. It is also worth re- membering that t ...
Introducing Sharks, Skates, Rays, and Chimaeras 3 What are sharks and how are they classified? What then is a shark? The taxonom ...
4 Sharks: The Animal Answer Guide Subdivision Selachii (sharks) Superorder Squalomorphi Order Hexanchiformes—two families of fri ...
Introducing Sharks, Skates, Rays, and Chimaeras 5 even species is the shape and nature of the cartilaginous skull (chondro- cran ...
6 Sharks: The Animal Answer Guide The chimaeras have beaklike tooth plates that are worn and regrown as the animal grows. Their ...
Introducing Sharks, Skates, Rays, and Chimaeras 7 their bodies and their fins to swim, passing a wave of muscular contractions d ...
8 Sharks: The Animal Answer Guide and skates or rays are flat from top to bottom—too many exceptions occur to make that a reliab ...
Saw sharks are true selachian sharks that have evolved the same basic body form as the sawfishes, which are actually batoid rays ...
10 Sharks: The Animal Answer Guide section, which is thick and continuous with the head and trunk, and the tail fin, which is la ...
Introducing Sharks, Skates, Rays, and Chimaeras 11 gear. The sharks were relatively small, about 0.75 m (2.5 ft) long. Swell sha ...
12 Sharks: The Animal Answer Guide pronounced shock, which was the name of a demonic, fishlike god. Appar- ently, Europeans, pri ...
Introducing Sharks, Skates, Rays, and Chimaeras 13 Few sharks live below 3,000 m (9,840 ft), the record holders being a Portu- g ...
14 Sharks: The Animal Answer Guide (“spiral saw”) had a lower jaw and tooth form unlike any living shark, its teeth arranged in ...
Introducing Sharks, Skates, Rays, and Chimaeras 15 typus (in its own family, the Rhincodontidae). Whale Sharks have been mea- su ...
16 Sharks: The Animal Answer Guide the smallest being the Dwarf Lantern Shark, Etmopterus perryi, at 17 to 21 cm (7–8 in) and 15 ...
Introducing Sharks, Skates, Rays, and Chimaeras 17 smallest skates, the pygmy skates, are in the genus Fenestraja; they reach to ...
18 Sharks: The Animal Answer Guide to catch the fastest tuna, anymore than the cheetah has to catch the fastest gazelle. Slower ...
Introducing Sharks, Skates, Rays, and Chimaeras 19 Where can I find fossil shark teeth? Replacement teeth developed early during ...
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