Eucidaris tribuloides
| Slate pencil urchin | |
|---|---|
| Slate pencil urchin on a brain coral | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Order: | Cidaroida |
| Family: | Cidaridae |
| Genus: | Eucidaris |
| Species: | E. tribuloides |
| Binomial name | |
| Eucidaris tribuloides (Lamarck, 1816) | |
| Synonyms | |
Eucidaris tribuloides, the slate pencil urchin (named after slate pencil), is a species of cidaroid sea urchins that inhabits littoral regions of the Atlantic Ocean. As a member of the basal echinoid order Cidaroida, its morphological, developmental and molecular genetic characteristics make it a phylogenetically interesting species.