nucleoconch

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English

Etymology

From nucleo- +‎ conch.

Noun

nucleoconch (plural nucleoconchs or nucleoconches)

  1. (zoology) The embryonic shell of a foraminifera, especially the protoconch and deuteroconch of a megalospheric form.
    • 1945, John West Wells, American Old and Middle Tertiary Larger Foraminifera and Corals, page 77:
      This nucleoconch is less than half the size of that seen in the sections of D. crassa.
    • 1954, Alan Hilder Smout, Lower Tertiary Foraminifera of the Qatar Peninsula, British Museum (Natural History), page 25:
      A microspheric nucleoconch does not have an obvious deuteroconch, and is followed by a spiral nepionic stage, no matter what the adult chamber arrangement may be.