radiolaria - rads_cenozoic - Amphipternis clava radiolaria - rads_cenozoic - Amphipternis clava

Amphipternis clava

Classification: rads_cenozoic -> Amphipyndacidae -> Amphipternis -> Amphipternis clava
Sister taxa: A. alamedaensis, A. clava, A. sp.


Citation: Amphipternis clava (Ehrenberg 1873)
taxonomic rank: species
Basionym: Lithocampe clava Foreman 1973
Taxonomic discussion: (Ehrenberg) 1873 p.238; 1875 pl.4 fig.2 as Lithocampe; Foreman 1973 p.430 pl.7 figs.16-17, pl.9 figs.2,7

Catalog entries: Lithocampe clava

Original description: (6-articul.), clavata laevis, capitulo parvo subgloboso inermi integerrimo. Artic. II primo angustior cum 3 sequentibus sensim dilatatis, latior quam longus. Artic. VI urceolato-ovatus. 4 medii articuli cellularum parvarum series transversas 2-4 gerunt. Artic. VI in anteriore parte minorum cellularum series transversas 5, in posteriore parte valde increscentes ibique sparsas gerit. In observato specimine postica pars non integra videbatur.
[6-segmented, clavate, smooth, with cephalis small, subglobose, unarmed and entire. Second segment narrower than the first, with the three following gradually dilate, broader than long. Sixth segment urceolate-ovate. The four median segments have 2-4 transverse rows of small pores. Sixth segment with five transverse rows of pores in the anterior part, posteriorly the pores greatly increasing in size and everywhere sparse. In the observed specimen, the posterior part did not seem to be whole. (Translated from Latin by E.M.R. and W.R.R.)]

Length 150µm, of cephalis 15µm of last segment 75µm. 4 small pores in 23µm.
Remarks on original description: [New name Amphipternis clava (Ehrenberg) Foreman 1973a]


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

Foreman, H. P. (1973b). Radiolaria of Leg 10 with systematics and ranges for the families Amphipyndacidae, Artostrobiidae, and Theoperidae. Initial Reports of the Deep Sea Drilling Project. 10: 407-474. gs O


Amphipternis clava compiled by the radiolaria@mikrotax project team viewed: 17-6-2024

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