Tholospira


Classification: rads_cenozoic -> Pyloniidae -> Tholospira
Sister taxa: Dipylissa, Discopyle, Hexapyle, Larcopyle, Larcospira, Octopyle, Pylolena, Pylospira, Spirema, Tetrapyle, Tholospira, Trilobatum,
Daughter taxa: (blue => in age window 0-800Ma)

neptune records:

neptune records:

neptune records:

Taxonomy

Citation: Tholospira Haeckel 1887
Rank: genus
Basionym: Tholospira

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.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

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

Plot of occurrence data:

References:

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 year 1873-1876, Zoology. 18: 1-1803. gs :: ::


logo

Tholospira compiled by the radiolaria@mikrotax project team viewed: 12-7-2020

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/radiolaria/index.php?id=205856 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics