Boschung, Herbert T. Department of Biological Sciences, University of Alabama, Tuscaloosa, Alabama.
Gardiner, Brian Linnean Society of London, Burlington House, Piccadilly, London, United Kingdom.
Last reviewed:October 2015
Show previous versions
- Phylogeny and classification
- Links to Primary Literature
- Additional Readings
The most recent and successful group (infraclass) of actinopterygians (ray-finned fishes), first appearing in the Upper Triassic. The members of the Teleostei (teleosts) constitute one of the major fish groups belonging to the class Actinopterygii (actinopterygians or ray-finned fishes). Generally, the class Actinopterygii is divided into the following subclasses: Cladistia [Polypteriformes (bichirs and reedfishes) and fossil orders], Chondrostei [Acipenseriformes (sturgeons and paddlefishes) and fossil orders], and Neopterygii (the remaining actinopterygian orders). The Neopterygii group is further divided into the Holostei [consisting of members of the Lepisosteiformes (gars), Amiiformes (bowfins), and several fossil taxa] and the Teleostei (which is considered as an infraclass). Consisting of about 40 orders, more than 400 families, and 26,000 extant species (Fig. 1), the teleosts account for more than half of all living vertebrates and more than 96% of all living fishes; of these, approximately 60% inhabit marine environments and 40% live in freshwater habitats. In addition, at least 40% of present-day teleosts have no known fossil record. See also: Actinopterygii; Fossil; Holostei; Osteichthyes
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 9000 highly qualified scientists and 43 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information