Theocotyle cryptocephala


Classification: rads_cenozoic -> Theoperidae -> Theocotylidae -> Theocotyle -> Theocotyle cryptocephala
Sister taxa: T. conica, T. cryptocephala, T. nigriniae, T. venezuelensis, T. sp.,

Taxonomy

Citation: Theocotyle cryptocephala (Ehrenberg) Sanfilippo and Riedel 1970
Rank: species
Notes & discussion: (Ehrenberg) 1873 p.227;1875 pl.11 fig.11; Sanfilippo & Riedel 1982 p.178 pl.2 fi; Sanfilippo et al.1985 p.685 figs.25.2a-b

Catalog entries: Eucyrtidium cryptocephalum

Original description: [3-segmented, with the margin slightly undulating, the cephalis hemispherical, small, unarmed and rather prominent. Second segment broadly campanulate, with pores in quincuncial rows. Third segment broader than the rest, subglobose, with the posterior part of the broad aperture slightly constricted and truncate, and with larger, well-separated pores quincuncially arranged. (Translated from Latin by E.M.R. and W.R.R.)]

Total length 135µm, of the cephalis 15µm, of second segment 41µm, of third segment 75µm. About 2 1/2 pores in 23µm.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

Plot of occurrence data:

References:

Ehrenberg, C. G. (1873a). Grössere Felsproben des Polycystinen-Mergels von Barbados mit weiteren Erläuterungen. Monatsberichte der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1873: 213-263. gs :: ::

Ehrenberg, C. G. (1876). Forsetzung der Mikrogeologischen Studien als Gesammt Ubersicht der mikroskopischen Palaontologie gleichartig analysierter Gebiegsarten der Erde, mit specieller Rucksicht aus den Polycystinen Mergel von Barbados. Physikalische Abhandlungen der Koniglichen Akademie der Wissenschaften zu Berlin. 1875: 1-226. gs :: ::

Sanfilippo, A. & Riedel, W. R. (1982). Revision of the radiolarian genera Theocotyle, Theocotylissa and Thyrsocyrtis. Micropaleontology. 28(2): 170-188. gs :: ::

Sanfilippo, A., Westberg-Smith, M. J. & Riedel, W. R. (1985). Cenozoic Radiolaria. In, Bolli, H. M. , Saunders, J. B. & Perch-Nielsen K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 631-712. gs :: ::


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Theocotyle cryptocephala compiled by the radiolaria@mikrotax project team viewed: 6-7-2020

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