acanthopterygii
Definition
Noun A taxonomic superorder of teleost fishes characterized by having fins supported by sharp, spiny bony rays. This group includes many common spiny-finned fish.
Usage
The term is used in scientific classification (ichthyology) to categorize a major group of fish. * Modern taxonomic systems often place these fish within the larger group Acanthomorpha. * The defining feature of Acanthopterygii is the presence of true spines in the fins.
Examples
- The perch, a common freshwater fish, is a classic example of a member of the Acanthopterygii.
- Acanthopterygii comprises a vast number of species, including most familiar marine and freshwater fish.
- The evolution of spiny fin rays in the Acanthopterygii is considered a key adaptation.
Advanced Usage
- In phylogenetic studies, the monophyly (common ancestry) of the traditional Acanthopterygii group is sometimes debated, with the term Acanthomorpha now frequently preferred for the clade containing spiny-rayed fishes.
Variants and Related Words
- Acanthopterygian (noun/adjective): A fish belonging to the Acanthopterygii; of or relating to this group.
- The acanthopterygian morphology is highly successful.
- Acanthomorph (noun): A member of the clade Acanthomorpha, which includes the spiny-rayed fishes.
Synonyms
- Spiny-rayed fishes
- Acanthomorph fishes (in modern cladistics)
Notes on Meaning
This is a specialized zoological and taxonomic term. It is not used in everyday language but is fundamental in scientific descriptions of fish anatomy and evolution.
Noun
-
teleost fishes having fins with sharp bony rays
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