radiolaria - rads_cenozoic - Collosphaera orthoconus

Collosphaera orthoconus

Classification: rads_cenozoic -> Collosphaeridae -> Collosphaera -> Collosphaera orthoconus
Sister taxa: C. armata, C. confossa, C. huxleyi, C. macropora, C. orthoconus, C. polygona, C. pyloma, C. tuberosa, C. sp.


Citation: Collosphaera orthoconus (Haeckel) Bjoerklund and Goll 1979
Rank: species
Basionym: Conosphaera orthoconus
Taxonomic discussion: (Haeckel) 1887; Bjørklund and Goll 1979 p.1317; Goll 1980 pl.1 figs.10-11; Alexandrovich 1989 (ODP 111 SR) pl.1 fig.8

Catalog entries: Conosphaera orthoconus

Original description: Pores of the shell irregular, roundish, twice to three times as broad as the bars; fourteen to sixteen on the radius. Conical spines about forty, regular, higher than they are broad, as long as the radius, with sixteen to twenty pores in the wall.




Biogeography and Palaeobiology

Similar species

Geographic distribution


Phylogenetic relations

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"

Plot of occurrence data:


Alexandrovich, J. M. (1989). Radiolarian biostratigraphy of ODP Leg 111, Site 677, eastern equatorial Pacific, late Miocene through Pleistocene. Proceedings of the Ocean Drilling Program, Scientific Results. 111: 245-262. gs V O

Bjørklund, K. R. & Goll, M. R. (1979a). Internal skeletal structures of Collosphaera and Trisolenia: A case of repetitive evolution in Collosphaeridae (Radiolaria). Journal of Paleontology. 53(6): 1239-1326. gs

Goll, M. R. (1980). Pliocene-Pleistocene radiolarians from the East Pacific Rise and the Galapagos spreading center, Deep Sea Drilling Project Leg 54. Initial Reports of the Deep Sea Drilling Project. 54: 425-453. gs V O

Haeckel, E (1887a). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876. 18: 1-1803. gs O


Collosphaera orthoconus compiled by the radiolaria@mikrotax project team viewed: 5-12-2022

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