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Metarhodactis is a genus of corallimorpharian, specifically the genus Metarhodactis, belonging to the family Discosomidae. It's a monotypic genus, meaning it contains only one species, Metarhodactis boninensis. These organisms are known for their large, oval-shaped oral discs with curled edges and unbranched papilliform tentacles. They are also characterized by having a high density of zooxanthellae in their tentacle gastrodermal tissue.
Here's a more detailed breakdown:
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Classification:
Metarhodactis is a corallimorpharian, falling under the phylum Cnidaria, subphylum Anthozoa, class Hexacorallia, order Corallimorpharia, and family Discosomidae.
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Description:
Studies on Thai specimens of Metarhodactis have shown they possess oval-shaped oral discs with curled edges and unbranched papilliform tentacles.
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Zooxanthellae:
These corals have a symbiotic relationship with zooxanthellae, which are photosynthetic organisms that provide them with nutrients.
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Nematocysts:
Metarhodactis possesses a variety of nematocysts, with holotrichs III and microbasic p-mastigophores being the most abundant.
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Reproduction:
Male and female reproductive organs are found in separate individuals.
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Distribution:
The species Metarhodactis boninensis is found in various parts of the world, including Thailand and Japan.
