> [!summary]- Classification
**Kingdom**:: [Animalia](Animalia.md)
**Phylum**:: [Echinodermata](Echinodermata.md)
**Subphylum**:: Echinozoa
**Superclass**::
**Class**:: Echinoidea
**Subclass**:: Euechinoidea
**Superorder**:: Diadematacea
**Order**:: Diadematoida
**Suborder**::
**Superfamily**::
**Family**:: Diadematidae
**Subfamily**::
**Genus**:: Diadema
**Species**:: D. setosum
**Vernacular**:: Diadem urchin
## Photos
*[122 - 2023-05-14 - Aspo faro - Epidaurus - Greece](122%20-%202023-05-14%20-%20Aspo%20faro%20-%20Epidaurus%20-%20Greece.md) - This is most likely to be D. setosum rather than [Diadema antillarium - Long-spined sea urchin](Diadema%20antillarium%20-%20Long-spined%20sea%20urchin.md) because of the distribution and the spines color.*
## Notes
Very close to [Diadema antillarium - Long-spined sea urchin](Diadema%20antillarium%20-%20Long-spined%20sea%20urchin.md). What helps to distinguish the species is the distribution, the spines colors, the test marks and how spines are distributed accross the body.
## References
- https://doris.ffessm.fr/Especes/Diadema-setosum-Oursin-diademe-a-anneau-orange-1848