Eucidaris tribuloides

Eucidaris tribuloides, the slate pencil urchin, 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.

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
  • Cidarites tribuloides, Lamarck, 1816
  • Cidaris tribuloides, Lamarck, 1816
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