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  • Echinoderm - Wikipedia
    There are about 7,600 extant species of echinoderm as well as about 13,000 known extinct species [9][10] All echinoderms are marine, but they are found in habitats ranging from shallow intertidal areas to abyssal depths
  • Echinoderm | Definition, Characteristics, Species, Facts | Britannica
    Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin Living species include sea lilies, sea urchins, sea cucumbers, starfishes, basket stars, and sea daisies
  • Echinoderms - Definition, Examples, Characteristics, and Habitat
    Echinoderms are spiny-skinned invertebrates of the phylum Echinodermata, specifically recognized by the pentamerous body (five-pointed) symmetry in adults The phylum derives its name from the Greek words ‘ekhînos,’ meaning ‘ hedgehog,’ and ‘dérma,’ meaning skin
  • Sea Stars, Urchins, and Relatives - Smithsonian Ocean
    Echinoderms possess an unusual suite of appendages on their skeletons, which are used for movement, interaction, and defense In addition to spines, urchins and sea stars both possess pedicellariae (singular pedicellaria) which are jaw-like structures often at the end of stalks
  • Phylum Echinodermata | manoa. hawaii. edu ExploringOurFluidEarth
    Echinoderms are named for the spines or bumps covering the outer surface of the bodies of many of them (Greek root word echino - meaning spiny; Latin root word - derm meaning skin) Examples of echinoderms include sea stars, sea urchins, sea cucumbers, brittle stars, and feather stars (Fig 3 83)
  • Echinoderms - MarineBio Conservation Society
    Echinoderms are a diverse group of marine animals belonging to the phylum Echinodermata They are characterized by a unique radial symmetry and a spiny or prickly outer skin The name “echinoderm” translates to “spiny skin,” which describes their appearance
  • Echinoderms - Definition, Characteristics, Types and Examples
    Echinoderms are a diverse group of invertebrate marine animals that include starfish, sea urchins, sand dollars, sea cucumbers, and crinoids The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates
  • About Echinoderms | Assembling the Echinoderm Tree of Life
    Whereas five major groups of echinoderms are living today (starfish, brittle stars, sea urchins, sea cucumbers, and sea lilies), more than 20 other, equally distinctive extinct echinoderms groups lived during the past
  • Echinoderm - Definition, Characteristics Examples - Biology Dictionary
    An echinoderm is a member of the phylum Echinodermata which contains a number of marine organisms recognized by their pentamerous radial symmetry, calcareous endoskeleton, and a water vascular system which helps operate their small podia
  • Echinoderms | Natural History Museum
    Echinoderms are an exclusively marine phylum with four distinctive characteristics: Echinoderms use a water vascular system for moving, feeding and respiration They have a skeletal system made of limy (calcite) plates





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