radiolaria - rads_cenozoic - Tripilidium clavipes <title>radiolaria - rads_cenozoic - Tripilidium clavipes

Tripilidium clavipes

Classification: rads_cenozoic -> Plagiacanthidae -> Sethoperidae -> Tripilidium clavipes
Sister taxa: Acanthobotrys, Archiscenium, Callimitra, Cladoscenium, Clathrocanium, Clathrocorys, Clathromitra, Euscenium, Pteropilium, Spongomelissa, T. clavipes, Tripocalpis, Tripodiscinus, Verticillata
Sub-taxa & variants (time control age-window is: 0-800Ma)
Tripilidium clavipes advena

neptune records:


Citation: Tripilidium clavipes Clark & Campbell 1942
Rank: species
Basionym: Tripilidium clavipes
Taxonomic discussion: Clark & Campbell 1942 p.64 pl.9 fig.29; Clark & Campbell 1945 p.34 pl.7 fig.30; Abelmann 1990 (ODP 113 SR) p 695 pl 5 fig 1. The genus Tripilidium is in practice a nomem dubium and species assigned to it should be reassigned to different genera. In this instance tho clearly a sethoperid no formal reassignment to genus yet checked for in literature. dbl 18.6.2020.

Catalog entries: Tripilidium clavipes

Original description: Shell small, globose, with stout horn and three equally distant, stout, laterally spiked feet which arise from broad, angled shoulder bladelike plates with sweepingly concave sides at the lower edge of the shell; the plates continuous in the interradii but with a few small, downwardly directed spines around the margin, form a tripod, each four-angled, the sides with scattered, very strong thorns of several sizes mostly at some distance below the base; apical horn cylindrical, stout, thick, broken off about halfway of its length; shell hemispherical but asymmetrical, the cavity following the contour, with scattered pores of several sizes enclosed within rectangular, shallow areas, these in turn within larger reticulated areas, the pores not numerous and well-separated, the pores circular, mostly uniform, but somewhat larger ones are found near the aperture; aperture a simple opening.

Length of shell, 50µm; of feet, 62µm; breadth of shell, 71.0µm. Distinguishing characters (rw): The species differs principally from the T. longipes n. sp. in the character of the feet which have very strong thorns on all sides. The horn is also stronger.
Remarks on original description: [The authors here list Tripilidium clavipes under the subgeneric name Tristylocorys and include the subgeneric name in the species name.




Biogeography and Palaeobiology

Similar species

Geographic distribution


Phylogenetic relations

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:


Abelmann, A. (1990). Oligocene to Middle Miocene radiolarian stratigraphy of southern high latitudes from Leg 113, Sites 689 and 690, Maud Rise. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 675-708. gs V O

Clark, B. L. & Campbell, A. S. (1942a). Eocene radiolarian faunas from the Mt. Diablo area, California. Geological Society of America, Special Papers. 39: 1-112. gs

Clark, B. L. & Campbell, A. S. (1945b). Radiolaria from the Kreyenhangen Formation near Los Banos, California. Geological Society of America, Memoir. 1-66. gs


Tripilidium clavipes compiled by the radiolaria@mikrotax project team viewed: 30-1-2023

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