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ANAPTYCHUS [1 record]

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Record 1 1977-07-22

English

Subject field(s)
  • Paleontology
OBS

[It is a] single plate closing [the] aperture of some ammonoids.

French

Domaine(s)
  • Paléontologie
OBS

Cette sous-classe "Ammonoidea" se distingue de la précédente "Nautiloidea" par (...) la possession d'un opercule calcifié ou corné (aptychus ou anaptychus) (...)

Spanish

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