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单词 cyrtochoanite
释义

cyrtochoanite

English

Etymology

cyrto- + choanite

Noun

cyrtochoanite (plural cyrtochoanites)

  1. A cyrtochoanitic organism.
    • 1931 10, Studies in Natural History:
      81 ) is inclined to regard it as a cyrtochoanite and points out that its narrow siphuncle indicates that it is not a holochoanite . With the exception of this single minute form , which is imperfectly known , even questionable []
    • 1937, Alvin Leonard Lugn; Arthur K. Miller; George Evert Condra; Gerald John Loetterle; Merlin Edward Upson, Correlation of the Members of the Shawnee Group in Southeastern Nebraska and Adjacent Areas of Iowa, Missouri and Kansas: 1933-1947:
      Although it is probable that this form is an orthochoanite and the segments of its siphuncle are cylindrical , it may be a cyrtochoanite with fusiform or even globular siphuncular segments . Until the nature of its siphuncle is []
    • 1939, Geological Society of America, Bulletin of the Geological Society of America:
      The writer agrees with Teichert that Lambeoceras is a cyrtochoanite rather than an orthochoanite as suggested by Troedsson . SOME MIDDLE CARBONIFEROUS AMMONOIDS AND THEIR STRATIGRAPHICAL SIGNIFICANCE BY A. ABSTRACTS 1965.
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