Ozawainellidae

Axial section of Paramillerella ampla, from Loeblich & Tappan (1964).

Belongs within: Loeblichiidae.

The Ozawainella are a group of fusulinids known from the upper Lower Carboniferous to the Upper Permian (Loeblich & Tappan 1964).

Characters (from Loeblich & Tappan 1964): Shell umbilicate to spherical or elongate, evolute in early forms, involute or irregularly uncoiled in later ones, axis of coiling short or long, first few volutions discoidal, others spherical to unevenly elongate; spirotheca composed of tectum with upper and lower tectoria in early forms but diaphanotheca occurring below tectum and above lower tectorium in later ones; septa plane; shell generally planispiral but may be asymmetrical, discoidal in at least part of shell with coiling axis in shortest diameter; tunnel singular.

<==Ozawainellidae [Ozawainellacea, Ozawainellinae, Reichelininae]
    |--Ozawainella Thompson 1935 LT64
    |    `--*O. angulata (Colani 1924) [=Fusulinella angulata] LT64
    |--Toriyamaia Kanmera 1956 LT64
    |    `--*T. laxiseptata Kanmera 1956 LT64
    |--Reichelina Erk 1941 LT64
    |    |--*R. cribroseptata Erk 1941 LT64
    |    `--R. changhsingensis K04
    |--Millerella Thompson 1942 LT64
    |    |--*M. marblensis Thompson 1942 LT64
    |    `--M. pressa LT64
    |--Rauserella Dunbar 1944 LT64
    |    |--*R. erratica Dunbar 1944 LT64
    |    `--R. yihewusuensis Xia in Ding, Xia et al. 1984 DX84
    |--Leella Dunbar & Skinner 1937 LT64
    |    |--*L. bellula Dunbar & Skinner 1937 LT64
    |    |--L. armenica K04
    |    `--L. kueichoensis K04
    `--Paramillerella Thompson 1951 LT64
         |--*P. advena (Thompson 1944) [=Millerella advena] LT64
         |--P. ampla LT64
         |--P. circuli LT64
         `--P. pinguis LT64

*Type species of generic name indicated

REFERENCES

[DX84] Ding Y., Xia G., Duan C., Li W., Liu X. & Liang Z. 1984. Study on the early Permian stratigraphy and fauna in Zhesi district, Nei Mongol Zizhiqu (Inner Mongolia). Bulletin Tianjin Institure Geol. Min. Res. 10.

[K04] Kobayashi, F. 2004. Late Permian foraminifers from the Limestone Block in the Southern Chichibu Terrane of west Shikoku, SW Japan. Journal of Paleontology 78 (1): 62–70.

[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. 1. The Geological Society of America and The University of Kansas Press.