Acanthopterygii

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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
  1. teleost fishes having fins with sharp bony rays

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