英和和英

名詞

macroconch (複数形 macroconchs または macroconches)

1. The female form of an ammonite (that has a larger shell than the male (microconch).
   • 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:

     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.