Crossopterygii
Definition
- Noun:
- A subclass of bony fishes: "Crossopterygii" is a taxonomic subclass of bony fishes characterized by paired, fleshy, lobe-like fins that resemble limbs. They are considered an evolutionary link between fish and amphibians.
Usage Examples
- Noun:
- The fossil record shows that Crossopterygii were once widespread.
- Scientists study Crossopterygii to understand the transition from aquatic to terrestrial life.
Advanced Usage
- In evolutionary biology: The term is used to discuss vertebrate evolution.
- The discovery of a living coelacanth, a member of the Crossopterygii, was a major scientific event.
Variants and Related Words
- Crossopterygian (adj/n): Of or relating to the subclass Crossopterygii; a fish belonging to this subclass.
- The crossopterygian fin structure is highly studied.
Synonyms
- Lobe-finned fishes: A common name for this group.
- Sarcopterygii: In modern taxonomy, this class often includes the lobe-finned fishes, making "Crossopterygii" a more historical or specific grouping.
Noun
-
fishes having paired fins resembling limbs and regarded as ancestral to amphibians
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