Sea Urchins
35 entries in the Sea Urchins compendium.
EchinoideaSpiny, globular echinoderms found in all oceans and depths.Sea urchinSpiny, globular echinoderms found in all oceans and depths.Cidaroidea (subclass)Primitive sea urchins with widely separated primary spines.Fossil echinoidsFossilised sea urchins with a rich cultural and geological history.IrregulariaIrregularia are sea urchins with bilateral symmetry and irregular tests.NeognathostomataA superorder of irregular sea urchins including sand dollars.Sand dollarFlat, burrowing sea urchins with coin-like tests.Sea urchin injuryPuncture wounds from brittle spines cause pain and inflammation.Sea urchin skeletogenesisLarval skeleton formation in the sea urchin, critical yet transient.Sea urchins of the Gulf of CaliforniaSea urchins of the Gulf of California, a biodiverse region.Test (biology)Hard shell of sea urchins and foraminiferans, made of calcium carbonate.AspidodiademaA genus of sea urchins with slender whorled spines.CoelopleurusBrightly colored abyssal sea urchins with fossil records from the Eocene.Diadema (echinoderm)A widespread, ecologically important genus of tropical sea urchins.EchinocyamusA genus of echinoderms with almost cosmopolitan distribution.EchinolampasA cosmopolitan genus of echinoderms in the family Echinolampadidae.Echinus (echinoderm)A genus of sea urchins first described by Linnaeus in 1758.HeliophoraA morphologically variable sand dollar from West African waters.HemicentrotusMonotypic sea urchin genus with a long harvest history.HeterocentrotusBrightly colored sea urchins with thick, slate-pencil-like spines.LoveniaA genus of sea urchin with fossil and Recent species worldwide.LoxechinusMonotypic genus of sea urchin native to southern South America.MespiliaA tropical sea urchin with vibrant blue zones and small spines.Salmacis (echinoderm)A genus of Indo-Pacific sea urchins with hemispherical tests and sharp spines.SpatangusA genus of heart urchins that graze on subsurface deposits.SphaerechinusThe only species in its genus, found in the Mediterranean and eastern Atlantic.SterechinusA genus of Antarctic sea urchins with a fossil European origin.CassiduloidaA once-diverse order of sea urchins, now reduced to seven species.CidaroidaPrimitive sea urchins with widely separated primary spines.PsychocidaridaeA sea urchin family with one living genus and a Jurassic fossil record.Dendraster excentricusA burrowing sand dollar with an off-center flower pattern.EchinothurioidaDeepsea sea urchins with flexible tests and hollow spines.PelanechinusExtinct Jurassic sea urchin with a flexible, tile-like test.Phormosoma placentaA deepwater Atlantic sea urchin with a flexible, collapsing test.Sea urchin as foodSea urchins are preyed upon by humans among other predators.
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