ammonitella

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See also: Ammonitella

English[edit]

Etymology[edit]

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Noun[edit]

ammonitella (plural ammonitellas)

  1. The initial part of a spiral shell, originating from a central chamber, in ammonoid molluscs
    • 2016 January 14, “Paleobiology of the Latest Tithonian (Late Jurassic) Ammonite Salinites grossicostatum Inferred from Internal and External Shell Parameters”, in PLOS ONE[1], DOI:10.1371/journal.pone.0145865:
      The embryonic stage, consisting of a small ellipsoid protoconch and ammonitella, ends at about 0.6 mm.