Type Genus

Helicosphaera Kamptner, 1954


Species of Helicosphaeraceae are identified based on

  • Extend of blanket [entirely or partly covers the distal surface of the flange or confined the central area without impinging on the flange]
  • The shape of the blanket [symmetrical or asymmetrical]
  • Bar type [conjunct or disjunct]
  • The orientation of bar [oblique, axial, inverse or lateral/traverse]
  • Termination of flange [expanded, flush, truncated]

Black, M., 1971c. The systematics of coccoliths in relation to the paleontological record. In: Funnell, B. M., Riedel, W. R. (eds), The Micropaleontology of the Oceans. Cambridge University Press, Cambridge pp. 611-624.

Kamptner, E., 1954. Untersuchungen über den Feinbau der Coccolithen. Archiv für Protistenkunde 100, 1-90.