Euechinoidea

Euechinoidea
Euechinoidea
Systematics
Trunk : Echinoderms (Echinodermata) Sub-stem : Eleutherozoa (Eleutherozoa) Class : Sea urchin (Echinoidea) Subclass : Euechinoidea
Scientific name
Euechinoidea
Bronn , 1860

The euechinoidea include except cidaridae (Chidaridae) all extant sea urchin species . They are in four superorders divided. The euechinoidea has existed since the Triassic .

Systematics

Superordinate orders / orders / families (incomplete)

• Atelostomata Zittel, 1879
  • Spatangoida (Spatangoida)
• Diadematacea Duncan, 1889
  • Diadematoid
    • Diadem sea urchin (Diadematidae)
  • Leather urchin (Echinothurioida)
• Echinacea Claus, 1876
  • Real sea urchin (Echinoida)
    • Echinometridae (Echinometridae)
    • Strongylocentrotidae
• Gnathostomata Zittel, 1879
  • Sand dollars (Clypeasteroida)

Diadematacea and Echinacea used to be grouped together as regularia (sea urchins with radially symmetrical calcareous skeleton), atelostomata and gnathostomata formed the irregularia (sea urchins with bilateral symmetry). This is now considered obsolete, as Echinacea has both regular and irregular forms.

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literature

• Horst Füller, Hans-Eckard Gruner, Gerhard Hartwich, Rudolf Kilias, Manfred Moritz: Urania Tierreich, Invertebrates 2 (Annelida to Chaetognatha) . Urania-Verlag, Leipzig 1994, ISBN 3-332-00502-2 .

Web links

• ITIS Euechinoidea Bronn, 1860