Phylum Cnidaria 2

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Last updated 12:38 AM on 9/22/26
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16 Terms

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Class Anthozoa

no medusa stage, subclasses Hexacoralliaand Octocorallia

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Mesentary

partitions of tissue that section off GVC, complete and incomplete

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Acontia

stinging cells inside GVC

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Siphonoglyph

ciliated groove at both ends of mouth to bring water into body

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Hydrostatic skeleton

structural support that relies on pressurized water

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Acrorhagi

secondary tentacles to kill other anemones

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Subclass Hexacorallia

6 tentacles 6 septa- Metridium, Anthopleura

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Metridium

carnivorous, catches food with tentacles

<p>carnivorous, catches food with tentacles</p>
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Anthopleura

zooxanthellae and zoochlorellae in tissue, carnivorous

<p>zooxanthellae and zoochlorellae in tissue, carnivorous</p>
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Subclass Octocorallis

8 tentacles 8 septa, pinnate tentacles- Gorgonia/Leptogorgia, Tubipora, Ptilosarchus/Renilla

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Pinnate tentacles

tentacles with side branches coming off

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Gorgonia and Leptogorgia

polyps connected by coenchyme, salenia, central gorgonia shaft

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Coenchyme

thick mass of mesoglea with connecting tubes

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Salenia

gastrodermal tubes

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Tubipora

each polyp has tube to stick out/retract into, all tubes connect

<p>each polyp has tube to stick out/retract into, all tubes connect</p>
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Ptilosarchus and Renilla

primary polyps are main body, secondary polyps for feeding and pumping water