anapsid

Thân thiện

A turtle basks on a sunlit log, its anapsid skull clearly visible.

Definition

Noun: 1. A type of reptile characterized by a skull with no openings (fenestrae) in the temporal region behind the eyes: This is a major taxonomic group (subclass Anapsida) defined by this skull structure. All members of this group except turtles are extinct.

Examples of Usage

• Noun:
  • The turtle is the only surviving anapsid.
  • Fossils of early anapsids provide clues about reptile evolution.
  • Scientists study the anapsid skull structure to understand primitive reptilian anatomy.

Advanced Usage

• In taxonomic classification: The term is used scientifically to classify reptiles within the subclass Anapsida, contrasting with diapsids (like lizards and crocodiles) and synapsids (like mammals and their ancestors).
  • The classification of turtles as anapsids has been debated based on genetic evidence.

Variants and Related Words

• Anapsida (n): The scientific subclass name for the group of anapsid reptiles.
• Anapsid skull (n phrase): The specific skull structure defining this group.

Synonyms

• Anapsid reptile (n phrase): A more descriptive synonym.
• (Scientific) Member of the subclass Anapsida (n phrase).

Antonyms

• Diapsid (n): A reptile whose skull has two openings in the temporal region (e.g., lizards, snakes, crocodiles, birds).
• Synapsid (n): An amniote whose skull has one opening in the temporal region (e.g., mammals and their extinct relatives).

Học thuật

Noun

1. primitive reptile having no opening in the temporal region of the skull; all extinct except turtles

Từ đồng nghĩa

• anapsid reptile