| Calveriosoma hystrix | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Order: | Echinothurioida |
| Family: | Echinothuriidae |
| Genus: | Calveriosoma |
| Species: | C. hystrix |
| Binomial name | |
| Calveriosoma hystrix (Thomson, 1872) | |
Calveriosoma hystrix is a species of sea urchin of the family Echinothuriidae. Their armour is covered with spines. Calveriosoma hystrix was first scientifically described in 1872 by Thomson. [1] C. hystrix has a structure known as a siphon, which is a thin tube that runs parallel to the stomach. While its function is not certain, it likely serves a way of moving water from the esophagus to the beginning of the intestine. [2]
