placodermi
Definition
- Noun:
- An extinct taxonomic group of armored fish: Placodermi refers to a class of prehistoric, jawed vertebrates characterized by their distinctive bony plates covering the head and thorax. They are among the earliest known jawed fishes.
Usage Examples
- Noun:
- Fossils of the Placodermi provide crucial evidence for the early evolution of jaws.
- The museum's exhibit features a reconstructed skeleton of a member of the Placodermi.
Advanced Usage
- Scientific Context: The term is used almost exclusively in paleontological and evolutionary biological contexts to discuss early vertebrate life.
- The study focused on the diversification of Placodermi during the Devonian period.
Variants and Related Words
- Placoderm (n): A member of the Placodermi class; an individual armored fish.
- Dunkleosteus is a famous genus of placoderm.
Synonyms
- Armored fish: A descriptive, non-scientific term for these organisms.
- Bony-plated fishes: Another descriptive phrase referencing their key characteristic.
Notes on Meaning
- The term "Placodermi" is a fixed scientific classification. It is not used in everyday language and has no other common meanings or idioms.
Noun
-
extinct group of bony-plated fishes with primitive jaws
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