The Ophiocistioidea is a class of extinct echinoderms from the Palaeozoic and early Mesozoic. Ophiocistioids had a flattened dome-shaped body encased in a solid test of calcareous plates, similar to that of a modern sea urchin. The mouth was at the apex of the dome, and surrounded by a set of five jaws. The animals apparently did not have an anus, but a madreporite was on the upper surface, surrounded by what appear to be genital pores for the release of gametes. See also List of echinodermata orders.
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| - Ophiocistioidea (en)
- Ofiocistoïdeus (ca)
- Ophiocistioidea (fr)
- 蛇函綱 (ja)
- Ophiocistioidea (pt)
- 海蛇函 (zh)
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| - Els ofiocistoïdeus (Ophiocistoidea, gr. ophis, "serp" i kystos, "caixa") són una classe d'equinoderms del subembrancament Echinozoa coneguts només pels seus fòssils. (ca)
- Les Ophiocistioidea forment une classe éteinte d'échinodermes ayant vécu au cours du Paléozoïque. (fr)
- 蛇函綱 (じゃかんこう、Ophiocistioidea) は絶滅した棘皮動物のグループの一つである。オルドビス紀前期からペルム紀後期まで生息した。 (ja)
- Ophiocistioidea é uma extinta classe de equinodermos do Paleozoico. Ophiocistioidea tinha um corpo achatado em forma de cúpula encerrado em um teste de placa de calcário sólido, semelhante à de um ouriço do mar moderno. (pt)
- 海蛇函（ophiocistioids）是一类已灭绝的棘皮动物，生存於古生代奧陶紀至中生代三疊紀，是棘皮動物門在二疊紀－三疊紀滅絕事件中倖存下來的6個綱裡唯一沒有延續到現代的一類。牠們被認為是現今海膽綱及海參綱的姊妹群，具有介於海膽和海參之間的形態特徵。 (zh)
- The Ophiocistioidea is a class of extinct echinoderms from the Palaeozoic and early Mesozoic. Ophiocistioids had a flattened dome-shaped body encased in a solid test of calcareous plates, similar to that of a modern sea urchin. The mouth was at the apex of the dome, and surrounded by a set of five jaws. The animals apparently did not have an anus, but a madreporite was on the upper surface, surrounded by what appear to be genital pores for the release of gametes. See also List of echinodermata orders. (en)
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| - Restoration of Euthemon (en)
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| - Els ofiocistoïdeus (Ophiocistoidea, gr. ophis, "serp" i kystos, "caixa") són una classe d'equinoderms del subembrancament Echinozoa coneguts només pels seus fòssils. (ca)
- The Ophiocistioidea is a class of extinct echinoderms from the Palaeozoic and early Mesozoic. Ophiocistioids had a flattened dome-shaped body encased in a solid test of calcareous plates, similar to that of a modern sea urchin. The mouth was at the apex of the dome, and surrounded by a set of five jaws. The animals apparently did not have an anus, but a madreporite was on the upper surface, surrounded by what appear to be genital pores for the release of gametes. Five ambulacra radiated outwards from the mouth across the upper surface, but did not extend onto the flat underside. Each had three unusually large tube feet at the margin of the dome. Unlike normal tube feet, these were covered in small bony scales, and therefore remain visible in fossils. See also List of echinodermata orders. (en)
- Les Ophiocistioidea forment une classe éteinte d'échinodermes ayant vécu au cours du Paléozoïque. (fr)
- 蛇函綱 (じゃかんこう、Ophiocistioidea) は絶滅した棘皮動物のグループの一つである。オルドビス紀前期からペルム紀後期まで生息した。 (ja)
- Ophiocistioidea é uma extinta classe de equinodermos do Paleozoico. Ophiocistioidea tinha um corpo achatado em forma de cúpula encerrado em um teste de placa de calcário sólido, semelhante à de um ouriço do mar moderno. (pt)
- 海蛇函（ophiocistioids）是一类已灭绝的棘皮动物，生存於古生代奧陶紀至中生代三疊紀，是棘皮動物門在二疊紀－三疊紀滅絕事件中倖存下來的6個綱裡唯一沒有延續到現代的一類。牠們被認為是現今海膽綱及海參綱的姊妹群，具有介於海膽和海參之間的形態特徵。 (zh)
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