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Planktosphaeroidea


'Planktosphaeroidea' can also refer to...

 

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(phylum Hemichordata)

An extant class of hemichordates, of which only two specimens of planktonic, ciliated larvae have been found (in the Bay of Biscay). The internal structures indicate they are hemichordates but the adults are unknown.

Subjects: Zoology and Animal Sciences.


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