Eucidaris tribuloides

Eucidaris tribuloides, the slate pencil urchin, is a cidaroid sea urchin 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.

Eucidaris tribuloides

Eucidaris tribuloides, the slate pencil urchin, is a cidaroid sea urchin 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.