Belongs within: Stauraxonaria.
The Sponguracea are a group of radiolarians characterised by a skeleton with densely spaced concentric structures and a tiny microsphere in the central part.
<==Sponguracea [Ellipsida, Ellipsidiicae, Prunoidea, Spongurida]LT61 | i. s.: Ellipsidium Haeckel 1887AA05 |--Cyphantella Haeckel 1887 [=Cyphanta Haeckel 1887 non Walker 1865; Cyphantellidae, Cyphantidae]LT61 | |--*C. (Cyphantella) colpodes (Haeckel 1887) [=*Cyphanta colpodes]LT61 | `--C. (Cyphantissa Haeckel 1887)LT61 |--CyphinidaH04 | |--Cannartiscus Haeckel 1887H04, AA05 | | `--C. amphiconiscusH04 | |--Cyphinus Haeckel 1881AA05 | | `--C. amphilophusH04 | `--Cannartidium Haeckel 1887H04, AA05 | |--C. mammiferumH04 | `--C. mastophorumH04 |--PanartidaH04 | |--Panartus Haeckel 1887AA05 | | `--P. diploconusH04 | |--Peripanartus Haeckel 1887H04, AA05 | | `--P. amphiconusH04 | |--Panicium Haeckel 1887H04, AA05 | | `--P. coronatumH04 | `--Peripanicium Haeckel 1887H04, AA05 | `--P. amphicoronaH04 `--SponguridaeAA05 |--Prunobrachium Kozlova 1966AA05 |--Spongurus Haeckel 1862AA05 |--Patellula Kozlova 1972AA05 | `--P. heliosAA05 |--Spongocore Haeckel 1887AA05 | `--S. puella Haeckel 1887BC98 `--Amphibrachella Haeckel 1887LT61 (see below for synonymy) | i. s.: ‘Amphibrachium’ hastatumBL79 |--*A. (Amphibrachella) diminuta (Haeckel 1887) [=*Amphibrachium diminutum]LT61 |--A. (Amphibrachidium Haeckel 1887)LT61 `--A. (Amphibrachura Haeckel 1887)LT61
Amphibrachella Haeckel 1887LT61 [=Amphibrachium Haeckel 1881 non Schulze 1880AA05; incl. Spongolena Haeckel 1887AA05]
*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.
[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.