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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
    Two species of sea urchins, the Echinometra viridis (bottom left) and Tripneustes ventricosus (top right) Sea urchins or urchins ( ˈɜːrtʃɪnz ) are the class Echinoidea within the echinoderms
  • 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
  • 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
  • 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
  • What Are Echinoidea? Features, Life, Marine Role
    What Are Echinoidea? Echinoidea is a class within the phylum Echinodermata, encompassing familiar marine invertebrates such as sea urchins, sand dollars, and sea biscuits These animals are characterized by their radial symmetry, often exhibiting a five-part body plan, and a hard, spiny body
  • The Echinoidea - University of California Museum of Paleontology
    Regular echinoids include the Cidaroida (pencil urchins) and Echinoida (sea urchins, including the long-spined sea urchin shown above left)
  • 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
  • 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
  • Echinoidea Profile: Facts About the Class Echinoidea - ThoughtCo
    Information about the Class Echinoidea, including classification, feeding, habitat, reproduction and human uses
  • Echinoidea - Animalia
    Sea urchinsare 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)





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