Ctenocystoidea
Ctenocystoidea is an extinct clade of echinoderms, which lived during the Cambrian and Ordovician periods. Unlike other echinoderms, ctenocystoids had bilateral symmetry, or were only very slightly asymmetrical. They are believed to be one of the earliest-diverging branches of echinoderms, with their bilateral symmetry a trait shared with other deuterostomes. Ctenocystoids were once classified in the taxon Homalozoa, also known as Carpoidea, alongside cinctans, solutes, and stylophorans. Homalozoa is now recognized as a polyphyletic group of echinoderms without radial symmetry. Ctenocystoids were geographically widespread during the Middle Cambrian, with one species surviving into the Late Ordovician.
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Ctenocystoidea
Ctenocystoidea is an extinct clade of echinoderms, which lived during the Cambrian and Ordovician periods. Unlike other echinoderms, ctenocystoids had bilateral symmetry, or were only very slightly asymmetrical. They are believed to be one of the earliest-diverging branches of echinoderms, with their bilateral symmetry a trait shared with other deuterostomes. Ctenocystoids were once classified in the taxon Homalozoa, also known as Carpoidea, alongside cinctans, solutes, and stylophorans. Homalozoa is now recognized as a polyphyletic group of echinoderms without radial symmetry. Ctenocystoids were geographically widespread during the Middle Cambrian, with one species surviving into the Late Ordovician.
has abstract
Ctenocystoidea is an extinct c ...... ving into the Late Ordovician.
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Els ctenocistoïdeus (Ctenocyst ...... s inclou l'ordre Ctenocystida.
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Les Ctenocystoidea forment un ...... rdre : celui des Ctenocystida.
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Los ctenocistoideos (Ctenocyst ...... io de Norteamérica y Bohemia.
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Wikipage page ID
63,539,364
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1,023,935,370
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authority
Robison & Sprinkle, 1969
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caption
Phylogenetic relationships within Ctenocystoidea
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display parents
image caption
A specimen of Ctenocystis
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subdivision
*Conollia
*Courtessolea
*Ctenocystis
*Etoctenocystis
*Gilcidia
*Jugoszovia
*Pembrocystis
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subdivision ranks
Genera
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taxon
Ctenocystoidea
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type genus
Ctenocystis
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type genus authority
Robison & Sprinkle, 1969
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wikiPageUsesTemplate
comment
Ctenocystoidea is an extinct c ...... ving into the Late Ordovician.
@en
Els ctenocistoïdeus (Ctenocyst ...... s inclou l'ordre Ctenocystida.
@ca
Les Ctenocystoidea forment un ...... rdre : celui des Ctenocystida.
@fr
Los ctenocistoideos (Ctenocyst ...... io de Norteamérica y Bohemia.
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label
Ctenocistoïdeus
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Ctenocystida
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Ctenocystoidea
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Ctenocystoidea
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