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Paracrinoidea is an extinct class of blastozoan echinoderms. They lived in shallow seas during the Early Ordovician through the Early Silurian. While blastozoans are usually characterized by types of respiratory structures present, it is not clear what types of respiratory structures paracrinoids likely had. Despite the taxon's name, the paracrinoids are not closely related to crinoids. Only 13 to 15 genera are known. See List of echinodermata orders

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rdfs:label
  • Paracrinoidea (en)
  • Paracrinoïdeus (ca)
  • Paracrinoidea (de)
  • Paracrinoidea (es)
  • Paracrinoidea (fr)
  • パラクリノイド綱 (ja)
  • Paracrinoidea (pt)
  • 拟海百合 (zh)
rdfs:comment
  • Els paracrinoïdeus (Paracrinoidea) són una classe extinta d'equinoderms blastozous. Van viure en mars poc profunds durant l'Ordovicià Inferior fins al Silurià Inferior. Malgrat el nom del tàxon, els paracrinoïdeus no estan relacionats amb els crinoïdeus. (ca)
  • Die Paracrinoidea sind eine ausgestorbene Klasse der Stachelhäuter, die fossil vor allem aus dem Mittelordovizium Nordamerikas nachgewiesen ist. Die letzten sicheren Formen der Gruppe kommen aus dem Oberordovizium von Schottland, Funde unsicherer Zuordnung gibt es auch aus dem Unterdevon der USA. Das Taxon wurde 1945 durch den schwedischen Geologen eingeführt. (de)
  • Los paracrinoideos (Paracrinoidea) son una clase extinta de equinodermos que aparece en el registro geológico en el Ordovícico y desaparece en el Silúrico.​​​ Se caracterizaban por poseer un formado por placas con simetría bilateral y por poseer con una disposición uniseriada.​ No hay órdenes, 13 a 15 géneros se conocen. (es)
  • paracrinoïdes Paracrinoidea Fossile de . Classe † Paracrinoidea (d), 1945 Position phylogénétique * Bilatériens * Orthonectides * Acœles * Némertodermatides * Deutérostomiens * Chordata * Céphalochordés * Olfactores * Tuniciers * Crâniés * Myxines * Vertébrés * Xénambulacraires * Xénoturbellides * Ambulacraires * Hémichordés * Échinodermes * Protostomiens * Chétognathes ? * Lophotrochozoaires * Ecdysozoaires Groupe frère : Hemichordata Les Paracrinoidea (paracrinoïdes en français) sont une classe d'échinodermes connus uniquement sous forme fossile. (fr)
  • パラクリノイド綱は、ウミユリ綱に近縁であり、外見的にもよく似た、絶滅した棘皮動物である。 オルドビス紀初期からシルル紀初期にかけて、浅い海に生息していた。口の周りに採食用の腕が2本から5本、非対称もしくはいくらか左右対称的に配列しているのが特徴。消化管はU字型で、肛門は口の側に開く。不整形の体(萼部)とウミユリに似た茎を持つ。この茎で基質に付着していた可能性もあるが、体の一部を堆積物に埋めた状態で復元されることもある。 13から15の属のみが知られる。 (ja)
  • Paracrinoidea é uma extinta classe do filo dos equinodermos. (pt)
  • 拟海百合(Paracrinoidea)是一类已灭绝的棘皮动物,生存于奥陶纪早期至志留纪早期。萼板(Thecal plate)排列略作两侧对称,有2到4个似海百合的腕(Arm),具有侧羽枝。种类不多,目前已知约有15属。 (zh)
  • Paracrinoidea is an extinct class of blastozoan echinoderms. They lived in shallow seas during the Early Ordovician through the Early Silurian. While blastozoans are usually characterized by types of respiratory structures present, it is not clear what types of respiratory structures paracrinoids likely had. Despite the taxon's name, the paracrinoids are not closely related to crinoids. Only 13 to 15 genera are known. See List of echinodermata orders (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Paracrinoid_smithsonian.jpg
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