# Younginidae

> family of tetrapods that developed two holes (temporal fenestra) in each side of their skulls, about 300 million years ago

**Wikidata**: [Q8058609](https://www.wikidata.org/wiki/Q8058609)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Younginidae)  
**Source**: https://4ort.xyz/entity/younginidae


## References

1. Fossilworks
2. Global Biodiversity Information Facility
3. Interim Register of Marine and Nonmarine Genera
4. Open Tree of Life reference taxonomy version 3.6