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Hydranth vs Hydrotheca - What's the difference?

hydranth | hydrotheca |

In zoology terms the difference between hydranth and hydrotheca

is that hydranth is an individual polyp of a hydroid colony while hydrotheca is one of the calicles that protect the hydrants in certain Hydroidea (Thecaphora).

hydranth

English

Noun

(en noun)
  • (zoology) An individual polyp of a hydroid colony
  • *{{quote-book, 1970, Sylvan Meryl Rose, Regeneration citation
    • , passage=NM Stevens (1902) and Emil Godlewski (1904) described the transformation of pieces of stem to hydranths in the marine hydroid.}}

    Related terms

    *hydrozoan

    See also

    *hydrant

    hydrotheca

    English

    Noun

    (en-noun)
  • (zoology) One of the calicles that protect the hydrants in certain Hydroidea (Thecaphora).
    • (Webster 1913)