This classification is based on Hyman done in 1955.He has described the classes and orders of echinodermata which are existing on earth.According to him there are five classes of echinodermata that are listed here with the words that form the class and orders and examples.
Class1:-Crinoidea (Gr.,crinon=lily+eidos=form)
order:- Articulata
Examples:-Antedon, Rhizocrinus, Metacrinus
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| Metacrinus |
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| Rhizocrinus |
Class2:-Holothuroidea( Gr.,holothurion=waater polyp+eidos)
order1:-Aspidochirota
Examples:-Holothuria,Stichopus,Mesothuria
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| Mesothuria intestinalis |
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| Holothuria tubulosa |
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| Stichopus tremulus |
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| Stichopus |
order2:-Elasipoda
Examples:-Deima, Benthodytes
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| Benthodytes |
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| Benthodytes |
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| Deima |
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| Deima |
order:3-Dendrochirota
Examples:- Thyone,Cucumaria,Phyllophorus
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| Thyone-fusus |
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| Thyone - |
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| cucumaria frondosa |
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| cucumaria miniata |
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| cucumaria piperata |
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| cucumaria planci |
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| cucuaria pulcheerima |
order4:-Molpadonia
Examples:- Molpadia,Paracaudina
order5:-Apoda
Examples:- Synapta, Chiridoata
Class3:-Echinoidea (Gr.,echinos=hedgehog+eidos=form)
order:1-Lepidocentroda
Examples:-Phormosoma,Sperosoma
order2:-Cidaroidea
Examples:-Cidaris, Notocidaris
order3:- Aulodonata
Examples:- Diodema, Astropyga
order4:- Camarodonata
Examples:-Echinus,Strongylocentrotus
Class4:-Asteroidea (Gr.,aster=star+eidos=form)
order1:-Phanerozinia
Examples:-Luidia,Astropecten, Archaster,Pentaceros
order2:- Spinulosa
Examples:- Aesterina,Echinaster,Hymenater,Solaster
order3:-Forcipulata
Examples:- Brisingaster,Heliater,Zoraster,Asterias
Class5:- Ophiuroidea (Gr., ophis=serpent+oura=tail+eidos=form)
order1:-Ophirae
Examples:- Ophioderma,Ophioscolex,Ophiothrix
order2:-Euryalae
Examples:-Asteronyx.Astrophyton,Astoporpa
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