# Euryapsida

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

**Wikidata**: [Q738195](https://www.wikidata.org/wiki/Q738195)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Euryapsida)  
**Source**: https://4ort.xyz/entity/euryapsida


## References

1. Freebase Data Dumps. 2013
2. Fossilworks