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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 ( ˈɜːrtʃɪnz ) are the class Echinoidea within the echinoderms
  • 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 | INFORMATION | Animal Diversity Web - ADW
    There are approximately 940 species of echinoids distributed worldwide in marine habitats from the intertidal to 5000 meters deep Their fossil record is extensive due to their test (an internal skeleton), and dates back to the middle Ordovician period
  • Introduction to the Echinoidea
    Regular echinoids include the Cidaroida (pencil urchins) and Echinoida (sea urchins, including the long-spined sea urchin shown above left)
  • 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
  • Echinoidea - an overview | ScienceDirect Topics
    Echinoidea is defined as a class within the phylum Echinodermata that includes marine animals such as sea urchins and sand dollars, characterized by their distinctive pentaradial symmetry and an endoskeleton made of calcium carbonate
  • Echinoidea Profile: Facts About the Class Echinoidea - ThoughtCo
    Information about the Class Echinoidea, including classification, feeding, habitat, reproduction and human uses
  • Class Echinoidea - SeaNet
    Purple sea urchin; test 5 cm diameter (10 cm max), spines short (usually < half diameter of test) Small juveniles often white Common on rocky substrate, in crevices other sheltered microhabitats inaccessible to sea otters Herbivorous with a strong preference for giant kelp Geogr Range: Alaska to Baja
  • Echinoidea - Animalia
    Sea urchins are spiny, globular echinoderms in the class Echinoidea About 950 species of sea urchin are distributed on the seabeds of every ocean and inhabit every depth zone from the intertidal seashore down to 5,000 meters (16,000 ft; 2,700 fathoms)
  • 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)





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