Eucidaris is a genus of cidaroid sea urchins known as slate pencil urchins (named after slate pencil). They are characterised by a moderately thick test, a usually monocyclic apical disc, perforate and non-crenulate tubercles and nearly straight ambulacra with horizontal pore pairs. The primary spines are few and widely spaced, stout with blunt flat tips and beaded ornamentation and the secondary spines are short and apressed. They originated in the Miocene and extant members of the genus are found in the tropical Indo-Pacific Ocean, East Pacific, Atlantic Ocean and Caribbean Sea.[2]

Eucidaris
Eucidaris tribuloides on a brain coral
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Order: Cidaroida
Family: Cidaridae
Subfamily: Cidarinae
Genus: Eucidaris
Pomel, 1883[1]
Type species
Cidarites monilifera
Goldfuss, 1829
Species

See text

Species

edit

The World Register of Marine Species lists the following species:[1]

Species brought into synonymy
  • Eucidaris clavata Mortensen, 1928: synonym of Eucidaris tribuloides (Lamarck, 1816)

References

edit
  1. ^ a b Kroh, Andreas (2012). "Eucidaris Pomel, 1883". WoRMS. World Register of Marine Species. Retrieved 2013-03-22.
  2. ^ "Eucidaris Pomel, 1883". The Echinoid Directory. The Natural History Museum. Retrieved 2013-03-22.