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Record 1 2001-11-21

English

Subject field(s)
  • Paleontology

French

Domaine(s)
  • Paléontologie
OBS

Il existe un rapport pour chaque type de coquille [de Gastéropode], entre le diamètre du tube coquillier et l'angle spirale : si le diamètre du tube est égal à «htg [alpha]» [«h» étant la hauteur de la coquille et «[alpha]» la moitié de l'angle spirale], la «base» ou partie supérieure de la coquille est imperforée.

Spanish

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