Dictionary > Osteichthyes

Osteichthyes

Definition
noun
A taxonomic superclass of a diverse group of fish that have skeletons composed primarily of bone tissue
Supplement
Osteichthyes is taxonomic superclass of the phylum Chordata (chordates) and includes groups of fish that have skeletons mainly composed of bone tissues. Chordates are primarily characterized by having a notochord, dorsal hollow nerve cord, muscular post anal tail, and pharyngeal slits for at least some period of the life cycle of an animal. The phylum Chordata has three subphyla: Vertebrata (vertebrates), Tunicata (tunicates), and Cephalochordata (cephalochordates). The vertebrates include various animal groups such as fish, amphibians, reptiles, birds, and mammals. A fish pertains to any gill-bearing animals lacking limbs with digits. Osteichthyes (bony fish) is one of the taxonomic superclasses of fish. The others are chondrichthyes (cartilaginous fish) and Agnatha (jawless fish).
Osteichthyes includes the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). The bony fish group is paraphyletic with land vertebrates, and in some classification schemes the tetrapods are considered to be members of the osteichthyes for this reason.
Most bony fish belong to the Actinopterygii. There are only eight living species of lobe-finned fish (Sarcopterygii) including the lungfish and coelacanths. Some species of lobe-finned fish have jointed bones. There are over 29,000 species that belong to superclass Osteichthyes, which make them the largest class of vertebrates in existence today.
Word origin: Greek ὀστέον ‎(ostéon, “bone”) + ἰχθῡ́ς ‎(ikhthū́s, “fish”)
Scientific classification:

  • Kingdom: Animalia
  • Phylum: Chordata
  • Superclass: Osteichthyes (Huxley, 1880)

Other common name(s):

  • bony fish

See also:


You will also like...

Principles of Hormonal Control Systems
Principles of Hormonal Control Systems

Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

Gene Regulation in Eukaryotes
Gene Regulation in Eukaryotes

Learn about the general structure of a eukaryotic gene, the transcription factors, and post-transcriptional regulation....

Pink Lotus plant on a pond
Freshwater Lentic Communities & Animals

This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

Population Regulation in an Ecosystem
Population Regulation in an Ecosystem

With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..

green leaf - close up view
Leaves

Leaves are the major photosynthetic organ of a plant. Apart from that, they are also crucial to water movement. In this ..

complete-dominance
Dominance

This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..