genus Sphenodon
- noun
- /ˈdʒɛnəs ˈsfɛnədɒn/
- Specialized
- The tuatara, belonging to the genus Sphenodon, is often referred to as a living fossil due to its ancient lineage.
Examples
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Rhynchocephalians (beakheads) form the sister group to the squamates (lizards and snakes) and are represented by the extant single genus Sphenodon (the tuataras) today.
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Scientists study the genus Sphenodon to understand the evolution of reptiles in isolation.
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In New Zealand, the genus Sphenodon is known for its unique adaptations to the environment.
Synonyms
A reptile like a lizard living only in New Zealand and the last of an ancient group
Surface Forms
Morphology
This phrase is fully compositional: it names the taxonomic rank ('genus') followed by the specific genus name ('Sphenodon'), so a learner who knows both constituents will understand it refers to the biological genus Sphenodon. There is no idiomatic or metaphorical shift and the pattern 'genus + name' is cross-linguistically regular, making the meaning transparent to learners.
Etymology
Genus Sphenodon comes from old Greek parts sphen and odon, meaning 'wedge' and 'tooth'. The name points to the tuatara's wedge-like teeth and jaw, so it helps you remember this group of New Zealand reptiles.