Eucidaris tribuloides

Slate pencil urchin
Slate pencil urchin on a brain coral
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Order: Cidaroida
Family: Cidaridae
Genus: Eucidaris
Species:
E. tribuloides
Binomial name
Eucidaris tribuloides
(Lamarck, 1816)[1]
Synonyms
  • Cidarites tribuloides, Lamarck, 1816
  • Cidaris tribuloides, Lamarck, 1816

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.[2]

A specimen at the National Aquarium in Baltimore.
  1. ^ Kroh, Andreas (2012). "Eucidaris tribuloides (Lamarck, 1816)". WoRMS. World Register of Marine Species. Retrieved 2013-03-21.
  2. ^ Schroeder, TE (1981). "Development of a 'primitive' sea urchin (Eucidaris tribuloides): irregularities in the hyaline layer, micromeres, and primary mesenchyme". Biological Bulletin. 161 (1): 141–151. doi:10.2307/1541114. JSTOR 1541114.