Cycladophora davisiana

Classification: rads_cenozoic -> Theoperidae -> Theopilidae -> Cycladophora -> Cycladophora davisiana
Sister taxa: C. antiqua, C. bicornis, C. cabrilloensis, C. campanula, C. conica, C. cosma, C. davisiana, C. golli, C. humerus, C. pliocenica, C. robusta, C. sakaii, C. spongothorax, C. tetracantha, C. sp.


Citation: Cycladophora davisiana Ehrenberg 1862
Rank: species
Basionym: Cycladophora davisiana
Taxonomic discussion: Ehrenberg 1861 p.297; 1873 pl.2 fig.11; Motoyama 1996

Catalog entries: Cycladophora davisiana

Original description: lorica campanulata ter constricta; capitulo subgloboso aculeato, strictura a collo tumidulo discreto, ventre magis tumente, marginis limbo plano, poris maximis in series decussatas dispositis. Habitus Pterocodonis Davisiani sine aculeis colli. Long 1/24 \’ (capit 1/110\"’, colli 1/84\"’, ventris 1/48\"’). Lat. limbi 1/31\"’.
QTCycladophoras ab Eucyrtidiis differre censeo capituli divisione nunquam quaternaria et loricae fine esplanato, nunquam connivente. Capitis pori sparsi varii. In collo series 4. Ventris pororum maximorum series 3, in quavis serie 4-5 pori simul conspicui.
Translated description: [Shell campanulate, constricted 3 times; cephalis subglobose with a spine, separated from the slightly swollen neck[thorax] by a stricture; abdomen more swollen, with a flat edge of the margin; very large pores arranged in decussate rows. Similar to Pterocodon davisiana without collar spines. Length 94 µ (cephalis 20 µ, neck 27 µ, abdomen 47 µ). Breadth at the edge 72 µ.
Remarks on original description: Description based on a single specimen.
New name Theocalyptra davisian (Ehrenberg) Riedel, 1958, and Diplocyclas (?) davisiana (Ehrenberg) Petrushevskaya 1975c[comment from RadWorld database]


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"

Plot of occurrence data:


Ehrenberg, C. G. (1862b). Übersicht die Tiefgrund-Verhältnisse des Oceans am Eingange der Davisstrasse und bei Island. Monatsberichte der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1861: 275-315. gs

Motoyama, I. (1996). Late Neogene radiolarian biostratigraphy in the subarctic Northwest Pacific. Micropaleontology. 42(3): 221-262. gs


Cycladophora davisiana compiled by the radiolaria@mikrotax project team viewed: 18-4-2021

Taxon Search:
Advanced Search

Short stable page link: Go to 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
Captcha Image
Powered by Commentics