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单词 phragmoconic
释义

phragmoconic

English

Adjective

phragmoconic (not comparable)

  1. (malacology) Relating to, or composed of, phragmocone(s).
    • 1992, Geologica romana:
      It is entirely phragmoconic. The ribs are straight rectiradiate and branch at the ventral shoulder to give rise to two to three secondary ribs . As the venter is somewhat eroded little detail is visible there .
    • 2006, Dr. Surendra Prasad, Ammonite Biostragigraphy of Middle to Late Jurassic Rocks of Jaisalmer Basin, Rajasthan, India:
      Occasionally triplicate ribs are also seen at the phragmoconic stage. Biplicate with intercalation can also be seen. The body chamber shows regular trifurcation. The overall ornamentation is prorsiradiate which shows appreciable []
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