# Echiura

> subclass of annelids

**Wikidata**: [Q64119](https://www.wikidata.org/wiki/Q64119)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Echiura)  
**Source**: https://4ort.xyz/entity/echiura


## References

1. Integrated Taxonomic Information System. 2015
2. World Register of Marine Species. 2017
3. Integrated Authority File
4. Freebase Data Dumps. 2013
5. Taxonomy database of the U.S. National Center for Biotechnology Information
6. Encyclopedia of Life
7. Fossilworks
8. Dyntaxa
9. YSO-Wikidata mapping project
10. New Zealand Organisms Register
11. UMLS 2023
12. Interim Register of Marine and Nonmarine Genera
13. National Library of Israel