Osteichthyes- Melanotaenia boesemani 

The Class Osteichthyes first appeared in the Devonian Period.  The organisms arose first in freshwater, and then moved into saltwater.  The organisms belonging to the Class Osteichthyes have endoskeletons made up of bone.  The organisms have jaws and paired appendages.  The gill arches are internal to gills similar to the organisms in Class Chondrichthyes.  The gills are also covered by bony operculum.  The organisms dermal scales are not placoid.  Many forms of Osteichthyes have swim bladder. 

Examples of organisms found in the Class Osteichthyes are commonly know as bony fishes.

Osteichthyes- Lepidosiren paradoxa 

  1. Major divisions of life. (1999). Retrieved from http://waynesword.palomar.edu/trmar99.htm
  2. Classifications of organisms. (2006, September 8). Retrieved from http://faculty.southwest.tn.edu/rburkett/classification_of_organisms.htm
  3. Ramel, G. (2010). The vertebrata. Retrieved from http://www.earthlife.net/inverts/vertebrata.html 

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