Lipmanella dictyoceras, from

Belongs within: Eucyrtidioidea.

The Pterocoryinae are a group of radiolarians with a conical test known from the Cretaceous to the present (Afanasieva et al. 2005).

Characters (from Afanasieva et al. 2005): Highly conical test. Cephalis variously constructed. Abdomen of same size as cephalis. Abdomen terminating sac-like or aperture possessing shelf or short tube of peristome.

    |--Craterocyclas Haecker 1908AA05
    |--Ectonocorys Foreman 1968AA05
    |--Hexalodus Haecker 1908AA05
    |--Lamprocycloma Haeckel 1887AA05
    |--Lithopilium Popofsky 1913AA05
    |--Tetracorethra Haeckel 1887AA05
    |--Theocapsilla Haeckel 1887AA05
    |--Theocapsura Haeckel 1887AA05
    |--Theconus Haeckel 1887AA05
    |--Theocorbis Haeckel 1887AA05
    |--Androcyclas Jorgensen 1905AA05
    |    `--A. gamphonycha (Jørgensen 1900)BC98
    |--Theocorythium Haeckel 1887AA05
    |    `--T. trachelium (Ehrenberg 1872)BC98
    |--Pterocorys Haeckel 1881 [incl. Theoconus Haeckel 1887]AA05
    |    |--P. cranoides (Haeckel 1862)BC98
    |    `--P. rhinocerosH04
    |--Lamprocyclas Haeckel 1881AA05
    |    |--L. heteroporosBC79
    |    `--L. maritalis Haeckel 1887BC98
    `--Lipmanella Loeblich & Tappan 1961AA05 [=Dictyoceras Haeckel 1862 non Eichwald 1860LT61]
         |--*L. dictyoceras (Haeckel 1860) [=Lithornithium dictyoceras, *Dictyoceras dictyoceras]LT61
         `--L. xiphephorum (Jørgensen 1900)BC98

*Type species of generic name indicated


[AA05] Afanasieva, M. S., E. O. Amon, Y. V. Agarkov & D. S. Boltovskoy. 2005. Radiolarians in the geological record. Paleontological Journal 39 (Suppl. 3): S135–S392.

[BC79] Berggren, W. A., & J. A. Van Couvering. 1979. Quaternary. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A505–A543. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[BC98] Bjørklund, K. R., G. Cortese, N. Swanberg & H. J. Schrader. 1998. Radiolarian faunal provinces in surface sediments of the Greenland, Iceland and Norwegian (GIN) Seas. Marine Micropalaeontology 35: 105–140.

[H04] Haeckel, E. 1899–1904. Kunstformen der Natur. Bibliographisches Institut: Leipzig und Wien.

[LT61] Loeblich, A. R., Jr & H. Tappan. 1961. Remarks on the systematics of the Sarkodina (Protozoa), renamed homonyms and new and validated genera. Proceedings of the Biological Society of Washington 74: 213–234.

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