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Echinoidea    
海胆纲

海胆纲

Echinoidea
n 1: sea urchins and sand dollars [synonym: {Echinoidea}, {class
Echinoidea}]


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  • Sea urchin - Wikipedia
    Sea urchins or urchins ( ˈ ɜːr tʃ ɪ n z ) are echinoderms in the class Echinoidea About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal zone to deep seas of 5,000 m (16,000 ft) [1]
  • ADW: Echinoidea: INFORMATION
    Echi­noids are com­monly grouped as reg­u­lar or ir­reg­u­lar, with the great­est dif­fer­ences per­tain­ing to the oral struc­ture, shape of the or­gan­ism, and lo­ca­tion of the anus Reg­u­lar echi­noids are the sea urchins; they are gen­er­ally found on rocky sub­strates
  • Sea urchin | Description, Anatomy, Facts | Britannica
    Sea urchin, any of about 950 living species of spiny marine invertebrate animals (class Echinoidea, phylum Echinodermata) with a globular body and a radial arrangement of organs, shown by five bands of pores running from mouth to anus over the test (internal skeleton)
  • Echinoidea - Digital Atlas of Ancient Life
    Echinoidea comes from the Greek word ‘echinos’ meaning “spiny” and includes the sea urchins, sand dollars, and heart urchins Echinoids are the sister taxa to holothuroidians within the Echinozoa clade
  • Echinoidea Profile: Facts About the Class Echinoidea - ThoughtCo
    Information about the Class Echinoidea, including classification, feeding, habitat, reproduction and human uses
  • Echinoidea (Sea Urchins and Sand Dollars) | Encyclopedia. com
    Echinoids are members of a much larger group of marine animals called echinoderms These include asteroids (sea stars), ophiuroids (brittle stars), crinoids (feather stars), concentricycloids (sea daisies), and holothurians (sea cucumbers) The last group has the closest fossil linkage to echinoids than any other echinoderm class
  • Echinoidea - an overview | ScienceDirect Topics
    The site hosts data related to four of the five extant echinoderm classes (i e , Echinoidea, Holothuria, Asteroidea, and Ophiuroidea; Fig 1), providing a central platform for comparative evolutionary inquiries around the regulation of genes for developmental and cell biologists
  • The World Echinoidea Database - World Register of Marine Species
    Echinoids, or sea urchins (oursins [French], Seeigel [German], erizos de mar [Spanish]) constitute a group of exclusively marine invertebrates inhabiting the intertidal down to the deep-sea trenches They are characterized by a globose or flattened skeleton known as a test
  • Sea Urchins, Sand Dollars, and Heart Urchins (Class Echinoidea)
    Sea urchins or urchins ( ˈɜːrtʃɪnz ), archaically called sea hedgehogs, are small, spiny, globular animals that, with their close kin, such as sand dollars, constitute the class Echinoidea of the echinoderm phylum
  • Echinoids - British Geological Survey
    Echinoids are marine animals belonging to the phylum Echinodermata and the class Echinoidea They have a hard shell (referred to as a test) covered with small knobs (tubercles) to which spines are attached in living echinoids





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