Lampromitrinae

Lampromitra petrushevskayae, from Afanasieva et al. (2005).

Belongs within: Acropyramidoidea.

The Lampromitrinae are a group of cup-shaped radiolarians known from the Cretaceous to the present (Afanasieva et al. 2005).

Characters (from Afanasieva et al. 2005): Two segments, cap-shaped. From outside, cephalis separated from thorax. Arcs of basal ring may be weakly developed. Lateral lobes of cephalis often fused with thorax. Cephalis of types 1 or 2. Pores rounded or polygonal and arranged in longitudinal rows, less commonly spaced irregularly. No significant apical horn present. Spines D and L extend to thoracic wall forming costae, sometimes forming thin terminal feet. Axobate weakly developed. Aperture widely open, sometimes possessing narrow shelf or its derivatives. Occasionally aperture closed by plate of velum, supported by shelf.

<==LampromitrinaeAA05
    |--Anthocyrtoma Haeckel 1881AA05
    |--Calyptocoryphe Foreman 1968AA05
    |--Heliocryptocapsa Dumitrica 1970AA05
    |--Hexaphormis Haeckel 1881AA05
    |--Lamprodiscus Ehrenberg 1860AA05
    |--Lamprotripus Haeckel 1881AA05
    |--Micromelissa Haeckel 1881AA05
    |--Platycryphalus Haeckel 1881AA05
    |--Lampromitra Haeckel 1881AA05
    |    `--L. petrushevskayaeAA05
    |--Gongylothorax Foreman 1968AA05
    |    `--G. verbeekiBL79
    |--Halicapsa Haeckel 1881AA05
    |    `--H. communisBL79
    `--Theocorys Haeckel 1881AA05
         `--T. antiquaBL79

*Type species of generic name indicated

References

[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.

[BL79] Basov, V. A., B. G. Lopatin, I. S. Gramberg, A. I. Danjushevskaya, V. Ya. Kaban’kov, V. M. Lazurkin & D. K. Patrunov. 1979. Lower Cretaceous lithostratigraphy near Galicia Bank. Initial Reports of the Deep Sea Drilling Project 47: 683–717.

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