Cyclostome
Cyclostome
Cyclostome (pronunciation: /ˈsʌɪkləʊstəʊm/) is a term used in the field of Biology to refer to a group of jawless fish, which includes the lamprey and hagfish. The term is derived from the Greek words 'kyklos', meaning circle, and 'stoma', meaning mouth, referring to the round, jawless mouth characteristic of these species.
Etymology
The term 'Cyclostome' is derived from the Greek words 'kyklos' (κύκλος), meaning 'circle', and 'stoma' (στόμα), meaning 'mouth'. This refers to the round, jawless mouth that is a characteristic feature of the species in this group.
Characteristics
Cyclostomes are characterized by their eel-like bodies, lack of jaws, and the presence of a single nostril. They are also known for their cartilaginous skeleton and the absence of paired fins. Cyclostomes are further divided into two classes: Petromyzontida (lampreys) and Myxini (hagfish).
Related Terms
- Agnatha: A superclass of jawless fish, which includes the cyclostomes.
- Lampreys: A type of jawless fish belonging to the class Petromyzontida, characterized by their sucker-like mouth.
- Hagfish: Another type of jawless fish belonging to the class Myxini, known for their ability to produce slime when threatened.
- Petromyzontida: The class of cyclostomes to which lampreys belong.
- Myxini: The class of cyclostomes to which hagfish belong.
External links
- Medical encyclopedia article on Cyclostome
- Wikipedia's article - Cyclostome
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