Belongs within: Spirillinana.
The Cymbaloporidae are a group of trochospiral Foraminifera known from the Upper Cretaceous to the present day. Later chambers form annular series in a single flat or conical layer, with numerous apertures and variously arranged circular pores (Loeblich & Tappan 1964).
<==Cymbaloporidae
|--Pyropilus Cushman 1934LT64
| `--*P. rotundatus Cushman 1934LT64
|--Gunteria Cushman & Ponton 1933LT64
| `--*G. floridana Cushman & Ponton 1933LT64
|--Archaecyclus Silvestri 1908LT64
| `--*A. cenomaniana (Seguenza 1882) [=Planorbulina cenomaniana]LT64
|--Eofabiania Küpper 1955LT64
| `--*E. grahami Küpper 1955LT64
|--Cymbalopora von Hagenow 1851LT64
| `--*C. radiata von Hagenow 1851LT64
|--Cymbaloporella Cushman 1927LT64
| `--*C. tabellaeformis (Brady 1884) [=Cymbalopora tabellaeformis]LT64
`--Tretomphaloides Bannder, Pereira & Desai 1985M13, HR92
`--*T. concinnus (Brady 1884) [=Discorbina concinna, Neoconorbina concinna, N. (*Tretomphaloides) concinnus]HR92
*Type species of generic name indicated
References
[HR92] Hansen, H. J., & S. A. Revets. 1992. A revision and reclassification of the Discorbidae, Rosalinidae, and Rotaliidae. Journal of Foraminiferal Research 22 (2): 166–180.
[LT64] Loeblich, A. R., Jr & H. Tappan. 1964. Sarcodina: chiefly “thecamoebians” and Foraminiferida. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt C. Protista 2 vol. 2. The Geological Society of America and The University of Kansas Press.
[M13] Mikhalevich, V. I. 2013. New insight into the systematics and evolution of the Foraminifera. Micropaleontology 59 (6): 493–527.