Definition

Noun: 1. An extinct amphibian of the superorder Labyrinthodontia: A labyrinthodont is a member of an extinct group of early amphibians (and some reptile-like ancestors) that lived from the Late Devonian to the Triassic periods. They are characterized by their complex, folded tooth enamel structure, which gives the group its name.

Usage Examples

• Noun:
  • The fossilized skull clearly identified the specimen as a labyrinthodont.
  • Paleontologists study labyrinthodonts to understand the transition from aquatic to terrestrial life.

Advanced Usage

• The term is primarily used in scientific and paleontological contexts to classify and describe these specific prehistoric animals based on their distinctive dental morphology.
• "Labyrinthodont-grade": A descriptive term used in evolutionary biology to refer to animals that share the characteristic labyrinthine tooth structure, even if they are not direct members of the superorder.
  • Some early tetrapods exhibited labyrinthodont-grade teeth.

Variants and Related Words

• Labyrinthodontia (proper noun): The scientific superorder name for the group.
• Labyrinthodontid (noun): Can be used to refer to a member of the family Labyrinthodontidae within the superorder.
• Labyrinthine (adjective): Meaning intricate and convoluted, like a maze; this is the root adjective describing the tooth structure ().

Synonyms

• Stegocephalian: An older, nearly synonymous term for a broad grouping of early amphibians with robust skulls, which includes labyrinthodonts.

Notes on Different Meanings

• The word labyrinthodont has a single, highly specific meaning in paleontology and zoology. It does not have common metaphorical or idiomatic uses in everyday language. Its meaning is directly tied to the anatomical feature (labyrinth-tooth) that defines the fossil group.

Noun

1. an amphibian of the superorder Labyrinthodontia