malacopterygii
Definition
Noun A taxonomic superorder of bony fish (teleosts) characterized primarily by having fins supported by soft, flexible rays made of cartilage or bone, as opposed to stiff, spiny rays. This group historically included many common soft-rayed fish.
Usage
The term is used in scientific classification (ichthyology) to describe a broad category of fish based on fin structure. * Early taxonomic systems placed herring, salmon, and catfish within the Malacopterygii. * The defining feature of the Malacopterygii is the presence of soft fin rays.
Advanced Usage
- The classification Malacopterygii is considered paraphyletic in modern cladistics, meaning it does not include all descendants of a common ancestor. It is more of a descriptive, anatomical grouping than a strict evolutionary one.
- It is often contrasted with the Acanthopterygii (spiny-rayed fishes), which include perch, bass, and tuna.
Variants and Related Words
- Malacopterygian (noun/adjective): A fish belonging to the Malacopterygii; of or relating to this group.
- The carp is a classic example of a malacopterygian fish.
Synonyms
- Soft-rayed fishes (descriptive term, not a taxonomic synonym)
Different Meanings
This word has a single, specific meaning in zoological taxonomy. It does not have common idiomatic or figurative uses.
Noun
-
an extensive group of teleost fishes having fins supported by flexible cartilaginous rays
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