radiolaria - rads_cenozoic - Tholospira radiolaria - rads_cenozoic - Tholospira


Classification: rads_cenozoic -> Pyloniidae -> Tholospira
Sister taxa: Dipylissa, Discopyle, Hexapyle, Larcopyle, Larcospira, Octopyle, Palaeotetrapyle, Pentapylonium, Pylolena, Pylospira, Spirema, Tetrapyle, Tholospira, Trilobatum
Daughter taxa (time control age-window is: 0-800Ma)
Tholospira cervicornis

neptune records:
Tholospira dendrophora

neptune records:
Tholospira sp.

neptune records:


Citation: Tholospira Haeckel 1887
taxonomic rank: genus
Basionym: Tholospira
Taxonomic discussion:

Catalog entries: Tholospira

Original description: Lithelida with. double, trizonal or Larnacilla-shaped medullary shell; cortical shell subspherical or lentelliptical, constructed of a simple or double spiral of the sagittal girdle (or third cortical girdle); the spiral lamella revolving around the transverse axis.

The genus Tholospira represents the third genus of Larcospirida. Whilst the spiral growth of the cortical shell is produced in Larcospira by the first (transverse) girdle of the Diplozonaria, in Pylospira by the second (lateral) girdle, in Tholospira it is effected by the third or sagittal girdle which we found complete in Pylonium. If in this genus one wing of the sagittal girdle overgrow the other remaining one and turn around the transverse axis, we get Tholospirema, the first subgenus of our genus, with simple spiral; but if afterwards the second wing follow the example of the first, and overgrow it from the other side, we get Tholospironium with double spiral.


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:


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. gs O


Tholospira compiled by the radiolaria@mikrotax project team viewed: 21-4-2024

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