Echinidae is a Family (biology), family of sea urchins in the order Echinoida. Members of the family are found in the Atlantic Ocean and the Antarctic.Family Echinidae Gray, 1825.
The Echinoid Directory. Retrieved 2011-08-28.

Characteristics

Members of the family Echinidae are characterized by having trigeminate ambulacra (quadrigeminate in one genus) with pairs of tube feet pores arranged either as vertical arcs or as a dense band. The ambulacral plates are compound. The tubercles are imperforate and do not have crenulate edges. There are few tubercles on the interambulacral plates. The buccal notches are reduced in size and, their most significant distinguishing feature, the pedicellariae are globiferous and have one or two pairs of lateral teeth on the narrow tubular blades.True Sea-urchins (Family Echinidae)
Marine Species Identification Portal. Retrieved 2011-08-28.

Genera

According to the World Register of Marine Species (WoRMS), the following Genus, genera are included in the family: *''Dermechinus'' (Ole Theodor Jensen Mortensen, Mortensen, 1942) -- 1 species *''Echinus (sea urchin), Echinus'' Carl Linnaeus, Linnaeus, 10th edition of Systema Naturae, 1758 -- 9 species *''Gracilechinus'' (Fell & Pawson, 1966) -- 8 species *''Polyechinus'' (Ole Theodor Jensen Mortensen, Mortensen, 1942) -- 1 species *''Sterechinus'' (Koehler, 1901) -- 6 species *''Atactus'' Pomel, 1883 † (''nomen dubium'') *''Stirechinus'' (Desor, 1856) † Image:Expl1825 - Flickr - NOAA Photo Library.jpg, ''Dermechinus horridus'' Image:Echinus esculentus - Carantec.jpg, ''Echinus esculentus'' Image:Gracilechinus acutus.JPG, ''Gracilechinus acutus'' Image:Sea urchins, Sterechinus neumayeri.jpg, ''Sterechinus neumayeri''

References

{{Taxonbar, from=Q528635 Echinidae, Extant Miocene first appearances