Classification: rads_cenozoic -> Theoperidae -> Bekomidae -> Bekomiforma
Sister taxa: Bekoma, Bekomiforma, Orbula,
Daughter taxa: (blue => in age window 0-800Ma)

neptune records: 24

neptune records:


Citation: Bekomiforma Sanfilippo and Riedel 1974
Rank: genus
Basionym: Bekomiforma

Catalog entries: Bekomiforma

Original description: Cephalis with two strong horns, thorax with three strong feet, and abdomen scarcely developed. Cephalis inflated-hemispherical, with the bars of the internal spicule situated above the collar flexure; the apical bar extends beyond the shell surface as a strong spine, the vertical bar extends as a short thorn, and between them is a strong spine not related to any internal bar. Collar stricture is marked by a gentle change in contour. Thorax approximately campanulate, but this shape modified near the distal margin by the tubular extensions which pass into the three divergent, proximally latticed feet. Thoracic wall incurved terminally. Most specimens have a trace of abdominal lattice projecting from the thoracic margin, well inside the feet. Cephalis appears minutely pitted rather than porous. Pores of the thorax, abdomen, and proximal parts of the feet regular, circular, closely spaced.


Biogeography and Palaeobiology



Phylogenetic relations:

Similar species:

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of Piacenzian Stage (100% up, 2.6Ma, in Piacenzian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Aquitanian Stage (0% up, 23Ma, in Aquitanian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Sanfilippo, A. & Riedel, W. R. (1974a). Radiolaria from the west-central Indian Ocean and Gulf of Aden, DSDP Leg 24. Initial Reports of the Deep Sea Drilling Project. 24: 997-1035. gs


Bekomiforma compiled by the radiolaria@mikrotax project team viewed: 18-9-2020

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