Classification: rads_cenozoic -> Theoperidae -> Theocotylidae -> Theocotyle
Sister taxa: Calocycloma, Lamptonium, Pterocodon, Theocotyle, Theocotylissa, Thyrsocyrtis
Daughter taxa (time control age-window is: 0-800Ma)
Theocotyle conica

neptune records: 56
Theocotyle cryptocephala

neptune records: 46
Theocotyle nigriniae

neptune records: 79
Theocotyle venezuelensis

neptune records: 71
Theocotyle sp.

neptune records:


Citation: Theocotyle Riedel and Sanfilippo 1970
Rank: genus
Basionym: Theocotyle

Catalog entries: Theocotyle

Original description: This genus is erected to include the members of the lineage leading from Theocotyle cryptocephala (?) nigriniae to T. venezuelensis, inclusive, and perhaps to T. (?) ficus. Shells are three-segmented, terminated in a distinctly differentiated peristomial collar. The cephalis is hemispherical to subspherical (bearing an apical horn), the thorax campanulate, hemispherical or conical, and the abdomen (the largest segment) subcylindrical to inflated.


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of Chattian Stage (100% up, 23Ma, in Chattian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Danian Stage (0% up, 66Ma, in Danian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Riedel, W. R. & Sanfilippo, A. (1970). Radiolaria, Leg. 4 DSDP. Initial Reports of the Deep Sea Drilling Project. 4: 503-575. gs


Theocotyle compiled by the radiolaria@mikrotax project team viewed: 27-1-2021

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