radiolaria - rads_cenozoic - Dictyoprora pirum

Dictyoprora pirum

Classification: rads_cenozoic -> Artostrobiidae -> Dictyoprora -> Dictyoprora pirum
Sister taxa: D. amphora, D. armadillo, D. mongolfieri, D. ovata, D. physothorax, D. pirum, D. salillum, D. urceolus, D. sp.


Citation: Dictyoprora pirum (Ehrenberg 1873)
Rank: species
Basionym: Eucyrtidium pirum Nigrini 1977
Taxonomic discussion: (Ehrenberg) 1873 p.232; 1875 pl.10 fig.14 as Eucyrtidium; Nigrini 1977 p.251 pl.4 fig.8; Neogene; Eucyrtidium pyrum (Ehrenberg)

Catalog entries: Eucyrtidium pirum

Original description: [2-segmented, pyriform, smooth; cephalis campanulate, large and unarmed, with pores in approximately longitudinal rows. Second segment constricted at each end, globosely swollen medianly) with the terminal aperture narrow and with a sub-even margin. Surface provided with widely separated transverse rows of pores. (Translated from Latin by E.M.R. and W.R.R.)]

Total length 94µm, of cephalis 37µm, of second segment 56µm. 3-4 pores in 23µm. Distinguishing characters (rw): This is a non-costate species related to Eucyrtidium mongolfieri.
Remarks on original description: [New name Theocampe pirum (Ehrenberg) Haeckel, modified as Dictyoprora pirum by Nigrini, 1977]




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:


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. Abhandlungen der Koniglichen Akademie der Wissenschaften zu Berlin. 1875: 1-226. gs

Nigrini, C. A. (1977). Tropical Cenozoic Artostrobiidae (Radiolaria). Micropaleontology. 23(3): 241-269. gs


Dictyoprora pirum compiled by the radiolaria@mikrotax project team viewed: 30-9-2022

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