cephalaspid
Definition
- Noun:
- An extinct jawless fish of the Devonian period with an armored head: A "cephalaspid" is a type of prehistoric, jawless vertebrate characterized by a bony shield covering its head. It belongs to an extinct group of fish known as ostracoderms.
Usage Examples
- Noun:
- The fossil record shows that the cephalaspid was a common bottom-dweller in Devonian seas.
- Paleontologists studied the distinctive head shield of the cephalaspid to understand early vertebrate evolution.
Advanced Usage
- Scientific Classification: The term is often used in paleontological and evolutionary biology contexts to refer to members of the order Cephalaspida.
- The cephalaspid lineage provides crucial insights into the development of the vertebrate skull.
Variants and Related Words
- Cephalaspida (n): The taxonomic order to which cephalaspids belong.
- Cephalaspida is an order of extinct, armored jawless fish.
- Ostracoderm (n): A broader term for extinct, armored, jawless fish, which includes cephalaspids.
- Cephalaspids are a specific type of ostracoderm.
Synonyms
- Armored jawless fish: A descriptive synonym highlighting its key features.
- Ostracoderm: A related, more general term for similar extinct fish.
Related Phrases / Idioms
(This word is a specific scientific term and is not commonly used in idiomatic expressions or phrasal verbs.)
Noun
-
extinct jawless fish of the Devonian with armored head
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