labyrinthodontia
Definition
Noun: 1. An extinct order of amphibians: Labyrinthodontia refers to a large, diverse, and extinct group of early amphibians. They are characterized by a robust, salamander or crocodile-like body, a solid and often flattened skull, and teeth with a highly folded, maze-like internal structure (from which their name is derived).
Usage
- The term is used in paleontology and evolutionary biology to classify and discuss these specific prehistoric animals.
- It is a formal, scientific term.
Examples
Advanced Usage
- The group Labyrinthodontia is now considered an informal or paraphyletic grouping in modern cladistics, as it includes ancestors of all living tetrapods (amphibians, reptiles, mammals) but not all of their descendants. It is often used in a historical or descriptive context.
Variants and Related Words
- Labyrinthodont (noun/adjective): A member of the Labyrinthodontia; or, relating to this group.
- The labyrinthodont skull was heavily armored.
- Temnospondyli: A large, important order of amphibians that falls within the broader, informal grouping of Labyrinthodontia.
Synonyms
- Stem-tetrapods (in a broad, informal sense)
- Early amphibians
Different Meanings
This word has a single, specific meaning in scientific terminology and does not have common alternative definitions.
Noun
-
extinct amphibians typically resembling heavy-bodied salamanders or crocodiles and having a solid flattened skull and conical teeth; Devonian through Triassic
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