Gyroidina orbicularis, from here.

Belongs within: Rotaliida.

Gyroidina is a genus of trochoid Foraminifera known from the Lower Cretaceous to the present (Cushman 1940).

<==Alabaminidae [Oridorsalidae]LT64b
    |--Valvalabamina Reiss 1963HW93
    |--Oridorsalis Andersen 1961PHT13, LT64b
    |    |--O. westi Andersen 1961LT64b
    |    `--O. umbonatus (Reuss 1851)LT64b, H03 [=Rotalina umbonataH03, Eponides umbonatusLT64b, Pseudoeponides umbonatusLT64b]
    |--Rotaliatina Cushman 1925LT64b
    |    |--*R. mexicana Cushman 1925LT64b
    |    `--R. sulcigeraB49
    |--Alabamina Toulmin 1941 [incl. Eponidoides Brotzen 1942]LT64b
    |    |--*A. wilcoxensis Toulmin 1941LT64b
    |    |--A. dorsoplanata (Brotzen 1940)M08, LT64b [=Eponides dorsoplanaLT64b, *Eponidoides dorsoplanaLT64b]
    |    `--A. tenuimarginataQ72
    `--Gyroidina d’Orbigny 1826LT64b, C40
         |--*G. orbicularis d’Orbigny 1826C40
         |--G. altiformis Stewart & Stewart 1930 [=G. soldanii var. altiformis]H03
         |--G. broeckianaJW99
         |--G. depressaC40
         |--G. girardanaC40
         |--G. komatsui Aoki 1964 [incl. Gyrodinoides shinjiensis Nomura 1986]H03
         |--G. neosoldaniiH90
         |--G. nitidaJW99
         |--G. profunda Aoki 1964H03
         `--G. soldaniiLT64a

*Type species of generic name indicated


[B49] Battey, M. H. 1949. The geology of the Tuakau-Mercer area, Auckland. Transactions and Proceedings of the Royal Society of New Zealand 77 (3): 429–455.

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

[H03] Hanagata, S. 2003. Miocene–Pliocene Foraminifera from the Niigata oil-fields region, northeastern Japan. Micropaleontology 49 (4): 293–340.

[HW93] Hart, M. B., & C. L. Williams. 1993. Protozoa. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 43–70. Chapman & Hall: London.

[JW99] Jian, Z.-M., L.-J. Wang, M. Kienast, M. Sarnthein, W. Kuhnt, H.-L. Lin & P.-X. Wang. 1999. Benthic foraminiferal paleoceanography of the South China Sea over the last 40,000 years. Marine Geology 156: 159–186.

[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.

[M08] McMillan, I. K. 2008. Reappraisal of foraminiferal assemblages of the Santonian–Campanian Mzamba Formation type section, and their correlation with the stratigraphic succession of the KwaZulu Basin. African Natural History 4: 25–34.

[PHT13] Pawlowski, J., M. Holzmann & J. Tyszka. 2013. New supraordinal classification of Foraminifera: molecules meet morphology. Marine Micropalaeontology 100: 1–10.

[Q72] Quilty, P. G. 1972. The biostratigraphy of the Tasmanian marine Tertiary. Papers and Proceedings of the Royal Society of Tasmania 106: 25–44.

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