scyphistoma

[ sahy-fis-tuh-muh ]

Phonetic (Standard)IPA

noun

, plural scy·phis·to·mae [sahy-, fis, -t, uh, -mee], scy·phis·to·mas.

a stage in the life cycle of a jellyfish or other scyphozoan when it is fixed in place and reproduces asexually to produce free-swimming medusas.

scyphistoma

/ saɪˈfɪstəmə /

a sessile hydra-like individual representing the polyp stage of scyphozoans. It produces forms which become free-swimming jellyfish

First recorded in 1870–75; scyphi- ( def ) + stoma ( def )

C19: from Greek skuphos cup + stoma

Strobila, stro-bī′la, n. a discomedusan at the stage succeeding the scyphistoma: a segmented tapeworm.

The original terminal ring of tentacles of the Scyphistoma gradually atrophies.

With the above changes the so-called Hydra tuba or Scyphistoma form is reached (vide fig. 85).

The formation of the sexual Medusa form takes place by a kind of strobilization of the body of the fixed Scyphistoma.

April 24, 2024gallimaufry

[gal-uh-maw-free ]

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