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English
Etymology
From macro- + conch.
Noun
macroconch (plural macroconchs or macroconches)
- The female form of an ammonite (that has a larger shell than the male (the microconch).
2016 January 14, “Paleobiology of the Latest Tithonian (Late Jurassic) Ammonite Salinites grossicostatum Inferred from Internal and External Shell Parameters”, in PLOS ONE, →DOI:Initially, the apophysis follows the coiling of the shell but it projects ventrolaterally during the final ontogenetic stage of macroconch development.
2017, Danna Staaf, Squid Empire, ForeEdge, →ISBN, page 59:A few collections of ammonoid eggs have even been found inside macroconchs, which is tempting to interpret as brooding behavior and further support for calling macroconchs female.