Cymbaloporidae

Halkyardia minima, from Cardiff University.

Belongs within: Spirillinana.

The Cymbaloporidae are a group of trochospiral Foraminifera known from the Upper Cretaceous to the present day (Loeblich & Tappan 1964b).

Characters (from Loeblich & Tappan 1964b): Test trochospiral, later chambers in annular series in single flat or conical layer; apertures numerous, variously arranged circular pores.

<==Cymbaloporidae
    |--Pyropilus Cushman 1934C40
    |    `--*P. rotundatus Cushman 1934C04
    |--Gunteria Cushman & Ponton 1933LT64a, C40
    |    `--*G. floridana Cushman & Ponton 1933C40
    |--Archaecyclus Silvestri 1908LT64b
    |    `--*A. cenomaniana (Seguenza 1882) [=Planorbulina cenomaniana]LT64b
    |--Eofabiania Küpper 1955LT64b
    |    `--*E. grahami Küpper 1955LT64b
    |--Cymbalopora von Hagenow 1851C40, LT64b
    |    `--*C. radiata von Hagenow 1851LT64b
    |--Cymbaloporella Cushman 1927C40
    |    `--*C. tabellaeformis (Brady 1884) [=Cymbalopora tabellaeformis]LT64b
    `--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

[C40] Cushman, J. A. 1940. Foraminifera: Their classification and economic use 3rd ed. Harvard University Press: Cambridge (Massachusetts).

[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.

[LT64a] Loeblich, A. R., Jr & H. Tappan. 1964a. Sarcodina: chiefly “thecamoebians” and Foraminiferida. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt C. Protista 2 vol. 1. The Geological Society of America and The University of Kansas Press.

[LT64b] Loeblich, A. R., Jr & H. Tappan. 1964b. 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.

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