radiolaria - rads_cenozoic - Phormocyrtis embolum radiolaria - rads_cenozoic - Phormocyrtis embolum

Phormocyrtis embolum


Classification: rads_cenozoic -> Pterocorythidae -> Phormocyrtis -> Phormocyrtis embolum
Sister taxa: P. alexandrae, P. cubensis, P. embolum, P. ligulata, P. proxima, P. striata, P. turgida, P. sp.

Taxonomy

Citation: Phormocyrtis embolum Ehrenberg 1873
Taxonomic rank: species
Basionym: Phormocyrtis embolum
Synonyms:

From Suzuki Paleotax db:

1874 Eucyrtidium embolum n. sp. Ehrenberg p. 228
1876 Eucyrtidium embolum Ehrenberg Ehrenberg p. 70-71, pl. 10, fig. 5
1887 Phormocyrtis embolum (Ehrneberg) Haeckel p. 1369
1957 Phormocyrtis embolum (Ehrenberg) Riedel p. 88-89, pl. 3, figs. 6, 7
1970 Phormocyrtis embolum (Ehrenberg) Cita et al. p. 403-404, pl. 2, fig. e
1972 Phormocyrtis embolum (Ehrenberg) group Petrushevskaya & Kozlova p. 537, pl. 22, figs. 8, 9
1974 Phormocyrtis embolum (Ehrenberg) Johnson p. 548, pl. 4, fig. 5
1974 Phormocyrtis embolum (Ehrenberg) Nigrini p. 1068, pl. 1h, figs. 4, 5
1974 Phormocyrtis embolum Ehrenberg [sic] Kruglikova pl. 3, fig. 10
1975 Phormocyrtis embolum (Ehrenberg) group Ling p. 729, pl. 10, fig. 15
1977 Phormocyrtis embolum (Ehrenberg) (?) Riedel & Sanfilippo pl. 8, fig. 13
1986 Phormocyrtis embolum (Ehrenberg) Riedel & Sanfilippo pl. 7, fig. 2
1995 Phormocyrtis embolum (Ehrenberg) group (?) Shilov p. 127, pl. 4, figs. 2, 3a, 3b
1999 Phormocyrtis embolum (Ehrenberg) Kozlova p. 148, pl. 31, fig. 14
2009 Eucyrtidium embolum Ehrenberg [Ehrenberg collection] Ogane et al. pl. 22, fig. 6a-c
Taxonomic discussion: Ehrenberg, 1873, p.228

Catalog entries: Eucyrtidium embolum

Original description: [3-segmented, smooth, with cephalis subglobose and not porous, terminating in a strong spine (broken), with a large, hyaline, median spot. Second segment constricted anteriorly, and dilated from the middle, sublageniform, passing into the third segment without strictures. Third segment narrower posteriorly and then cylindro-conical, the posterior margin torn (or truncate ?). Smooth surface ribs provided with a single row of pores ornament both segments of the shell. Total length 175 µ, of the cephalis 28 µ, of second segment 56 µ, of third segment 86 µ. (Translated from Latin by E.M.R. and W.R.R.)]

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. (1874b). Grössere Felsproben des Polycystinen-Mergels von Barbados mit weiteren Erläuterungen. Monatsberichte der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1873: 213-263. gs


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Phormocyrtis embolum compiled by the radiolaria@mikrotax project team viewed: 13-2-2025

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