Definition

Noun: * A rare reptile species: The sole surviving species of the order Rhynchocephalia. It is a large, lizard-like, diapsid reptile with a spiny crest along its back and neck, now found only on a few small islands off the coast of New Zealand.

Usage Examples

• Noun:
  • The Sphenodon punctatum is often called a "living fossil" due to its ancient lineage.
  • Conservation efforts are critical for the survival of Sphenodon punctatum.
  • Biologists study the Sphenodon punctatum to understand early reptilian evolution.

Advanced Usage

• Scientific and conservation context: This term is primarily used in formal, scientific, zoological, or conservation discussions. It is rarely used in everyday conversation.
  • The paper detailed the unique parietal eye of Sphenodon punctatum.
  • Protecting the habitat of Sphenodon punctatum is a top priority for New Zealand's Department of Conservation.

Variants and Related Words

• Tuatara (n): The common name for . This is the term most frequently used, even in scientific communication.
  • The tuatara is a national treasure of New Zealand.
• Rhynchocephalia (n): The reptilian order to which belongs.
  • The order Rhynchocephalia was once widespread but now contains only one species.

Synonyms

• Tuatara: The direct and most common synonym.

Related Terms (Scientific Context)

• Diapsid (adj/n): Referring to a group of reptiles characterized by two openings in the skull behind each eye; is a diapsid.
• Living fossil (n): An informal term for an extant species that closely resembles species known only from the fossil record, often applied to the tuatara.

Noun

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