Definition

Noun: 1. A large, lizard-like reptile: The tuatara is the sole surviving member of the ancient reptilian order Rhynchocephalia. It is not a true lizard but a distinct type of diapsid reptile characterized by a spiny crest along its back and a unique, primitive skull structure. 2. A living fossil: This term emphasizes that the tuatara's lineage is very ancient, with few changes over millions of years, making it a species of significant scientific interest.

Usage Examples

• Noun:
  • The tuatara is a unique reptile found only in New Zealand.
  • Scientists study the tuatara to understand early reptilian evolution.
  • A distinguishing feature of the tuatara is the pronounced spiny crest running down its back.

Advanced Usage

• In conservation biology: The term is often used in contexts discussing endemic species, island biogeography, and conservation efforts due to its restricted habitat and status as a protected species.
  • Protecting the tuatara's habitat is a major priority for New Zealand conservationists.

Variants and Related Words

• Rhynchocephalia (n): The biological order to which the tuatara belongs; all other members are extinct.
• Sphenodon punctatus (n): The scientific (binomial) name for the tuatara species.

Synonyms

• Living fossil (n): A common descriptive term for the tuatara, highlighting its ancient lineage. (Note: This is a general term, not a direct synonym for the animal itself.)

Related Phrases/Idioms

• A tuatara's pace: An informal, regionally used phrase (primarily in New Zealand) to describe something that moves or progresses very slowly, referencing the reptile's typically slow metabolism and movements.
  • The bureaucratic process moved at a tuatara's pace.

Noun

1. only extant member of the order Rhynchocephalia of large spiny lizard-like diapsid reptiles of coastal islands off New Zealand