Cyclostomata
Definition
- Noun:
- A taxonomic class of primitive jawless aquatic vertebrates: "Cyclostomata" refers to a class of fish-like vertebrates that lack jaws and possess a circular, sucking mouth. This group includes lampreys and hagfishes.
Usage Examples
- Noun:
- The Cyclostomata are considered the most primitive living vertebrates.
- Lampreys and hagfishes belong to the class Cyclostomata.
Advanced Usage
- In scientific taxonomy: The term is used in formal biological classification to group jawless fish distinct from jawed vertebrates (Gnathostomata).
- The evolutionary relationship between Cyclostomata and other vertebrates is a key area of research.
Variants and Related Words
- Cyclostome (n): A member of the Cyclostomata; a jawless fish.
- The sea lamprey is a well-known cyclostome.
Synonyms
- Agnatha: An older, synonymous taxonomic superclass for jawless vertebrates, which includes Cyclostomata and extinct groups like ostracoderms.
Notes on Meaning
- The term "Cyclostomata" is used almost exclusively in formal biological and zoological contexts. It is not used in everyday language.
Noun
-
primitive jawless aquatic vertebrate: lampreys; hagfishes
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