Definitions

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  • n. Plural form of hydrozoan.

Etymologies

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Examples

  • STROMATOPORA -- colonies of minute hydrozoans allied to corals -- grew in places on the sea floor, secreting stony masses composed of thin, close, concentric layers, connected by vertical rods.

    The Elements of Geology

  • This remarkable feature has ancient origins, dating back to the most primitive animals, such as sponges and hydrozoans.

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  • Scientists have warned the creatures, which are not strictly jellyfish but floating colonies of microscopic hydrozoans, could soon arrive in waters around the Balearic Islands and the Catalan coast.

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  • In turn, anthozoan species seem to have lost their group A HOX9-14 gene (present in hydrozoans; inconclusive data for scyphozoans; figure 1).

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  • For example, hydrozoans have lost their HOX2 genes (present in anthozoans; inconclusive data for scyphozoans; figure 1).

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  • (particularly the hydrozoans Podocoryne and Eleutheria) cast doubt on the conservation of a Hox code in cnidarians

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  • 1 Each such zooid in these pelagic colonial hydroids or hydrozoans has a high degree of specialization and, although structurally similar to other solitary animals, are all attached to each other and physiologically integrated rather than living independently.

    Pounding The Rock

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