Original description: Surface of the disk armed with radial spines. Bases of the marginal spines free, without a connecting equatorial girdle. Remarks on original description: [#Heliosestilla is here treated as a subgenus of Heliosestrum.]
Description
Biogeography and Palaeobiology
Biostratigraphic distribution
Geological Range: Last occurrence (top): at top of Paleogene Period (100% up, 23Ma, in Aquitanian stage). Data source: Total of ranges of the species in this database First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876. 18: 1-1803. gsO
Heliosestilla compiled by the radiolaria@mikrotax project teamviewed: 22-5-2025