# Tetrapygus niger

> species of echinoderm

**Wikidata**: [Q3203595](https://www.wikidata.org/wiki/Q3203595)  
**Source**: https://4ort.xyz/entity/tetrapygus-niger


## References

1. Additions to and revision of the South African echinoid fauna (Echinodermata: Echinoidea)
2. Illustrated guide to the echinoid (Echinodermata: Echinoidea) fauna of South Africa
3. Taxonomy database of the U.S. National Center for Biotechnology Information
4. Encyclopedia of Life
5. Global Biodiversity Information Facility
6. World Register of Marine Species
7. UMLS 2023
8. Barcode of Life Data Systems
9. Interim Register of Marine and Nonmarine Genera
10. SeaLifeBase
11. Ocean Biodiversity Information System
12. Open Tree of Life reference taxonomy version 3.6
13. EASIN Catalogue of Alien Species