order Pelycosauria
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Definition
- Noun (Proper):
- A taxonomic order of extinct, primitive, synapsid reptiles: "Order Pelycosauria" refers to an extinct order of early synapsids, which are often described as "mammal-like reptiles," that lived from the Late Carboniferous to the Late Permian periods. They are characterized by distinctive sail-like structures on the backs of some genera and are considered basal to the lineage leading to mammals.
Examples of Usage
- Noun:
- Fossils of the order Pelycosauria provide crucial insights into early synapsid evolution.
- Dimetrodon, a well-known genus within the order Pelycosauria, is often mistakenly called a dinosaur.
Advanced Usage
- In taxonomic hierarchy: Used to specify a precise level of biological classification.
- The order Pelycosauria is placed within the subclass Synapsida.
Variants and Related Words
- Pelycosaur (n): A common name for any member of the order Pelycosauria.
- The pelycosaur's sail may have been used for thermoregulation.
- Synapsid (n): The larger clade or subclass that includes Pelycosauria and all mammals.
- Pelycosaurs are an early branch of the synapsid family tree.
Synonyms
- Pelycosaurs (informal grouping): When used informally to refer to the members of this order.
Related Terms (Scientific Context)
- Edaphosaurus: A genus of herbivorous pelycosaurs known for a large sail on its back.
- Dimetrodon: A genus of carnivorous pelycosaurs, also sail-backed, and one of the most recognizable members of the order.
Noun
- edaphosaurus; dimetrodon