Biumbilicate

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Fig. 1. Biumbilicate shell in Astrononion sp. from the Gulf of Aqaba, Red Sea, Recent. SEM graphs. A: lateral view; B: apertural view; C: oblique view of dissected specimen showing structural details. a: aperture; f: foramen; fo: folium; foa: foliar aperture; sf: septal face, covered by septal flap; up: umbilical plate; u: umbilicus, on both sides of the test; (Hottinger, 2006; fig. 22 [1] CC/BY-NC-SA)

Definition

  • according to Hottinger (2006):

BIUMBILICATE - spiral test having umbilici on both sides.





References

Hottinger (2006), Illustrated glossary of terms used in foraminiferal research. Carnets de Géologie, Memoir 2, ISSN 1634-0744

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