What are some examples of jawless fish?Jawless Fish:Jawless fish evolved approximately 500 million years ago, making them the oldest type of fish still living. All jawless fish are members of the class Agnatha, one of the three classes, all of which belong to the phylum Chordata....
jawfish Jawlensky jawless fish jawlike jawn jawp Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024 add this widget to your site Did You Know? "Dude" was originally an insult given to men in the 1800s who were too obsessed with keeping...
Superclasses Agnatha and Pisces both represent a form of fish. Agnatha contains one hundred and five species of jawless fish (e.g. hagfish, lampreys).The superclass Pisces contains more than 27,000 species of bony fishes. They include:...
Phanerozoic eon » Paleozoic era » Silurian period: In the Silurian period (440-415 million years ago), a mass evolution of fish occurred. The Silurian marine fauna was predominated by jawless (agnathans) and jawed fish. The first freshwater fish first appeared as well. The arthropods, ...
><fish_class><typename="jawless"><bycatch><name>Carp</name><Place>Maldives</Place><fattyfish>15 percent</fattyfish><Smallbone>yes</Smallbone></bycatch></type><typename="ediblefish"><bycatch><name>Blue Fin Tuna</name><Place>United States</Place><fattyfish>5 percent</fattyfish><Smallbone...
The cyclostomes include two classes of living, jawless fishes (agnathous)—Petromyzontiformes (lampreyeels) and Myxiniformes (hagfishes). The hagfishes are totally marine, often living in deep waters associated with muddy bottoms. The lampreys may be marine as adults but spawn in fresh wate...
Agnathan, any member of the group of primitive jawless fishes that includes the lampreys (order Petromyzoniformes), hagfishes (order Myxiniformes), and several extinct groups.
Hormones have a long evolutionary history, knowledge of which is important if their properties and functions are to be understood. Many important features of thevertebrateendocrine system, for example, are present in the lampreys and hagfishes, modern representatives of the primitively jawless verteb...
Bony fish, any member of the superclass Osteichthyes, a group made up of the lobe-finned fishes and the ray-finned fishes of the subphylum Vertebrata, including the great majority of living fishes and virtually all the world’s sport and commercial fishe