sphenodon
Definition
Noun 1. A reptile of the genus Sphenodon, specifically Sphenodon punctatus: A rare, lizard-like reptile found only on certain islands off the coast of New Zealand. It is the sole surviving member of the order Rhynchocephalia, representing a very ancient lineage of reptiles.
Usage Examples
- Noun:
- The sphenodon is often called a "living fossil" due to its primitive anatomical features.
- Scientists study the sphenodon to understand early reptile evolution.
- A key feature of the sphenodon is a vestigial third, or parietal, eye on the top of its head.
Advanced Usage
- In taxonomic context: The term is used to specify the genus within the order Rhynchocephalia.
- The fossil record shows that the order Rhynchocephalia was once diverse, but today only the genus Sphenodon remains.
Variants and Related Words
- Tuatara (n): The common name for the reptile of the genus . While "sphenodon" is the scientific genus name, "tuatara" is the term used in general and conservation contexts.
- The tuatara is a protected species in New Zealand.
- Rhynchocephalia (n): The order of reptiles to which the sphenodon belongs.
- Rhynchocephalia is an ancient order distinct from lizards and snakes.
Synonyms
- Tuatara: This is the direct and most common synonym in non-scientific English.
Notes on Meaning
The word sphenodon refers specifically to the biological genus. In most general contexts, the common name tuatara is preferred. Using "sphenodon" typically indicates a formal or scientific context.
Noun
-
coextensive with the order Rhynchocephalia: tuataras
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