Various views of Tetrataxis conica, from Loeblich & Tapppan (1964).

Belongs within: Fusulinida.

The Tetrataxidae are a group of conical Foraminifera known from the lower Carboniferous to the Triassic (Loeblich & Tappan 1964).

Characters (from Loeblich & Tappan 1964): Test free, trochospiral, few chambers in whorl, conical; wall granular calcareous, in two layers.

<==Tetrataxidae [Tetrataxinae]
    |--Valvulinella Schubert 1907 [=Palaeovalvulina Schubert 1921, Palaeovalvuloria (l. c.)] LT64
    |    `--*V. youngi (Brady 1876) [=Valvulina youngi, *Palaeovalvulina youngi] LT64
    |--Polytaxis Cushman & Waters 1928 C40
    |    |--*P. laheei Cushman & Waters 1928 C40
    |    `--P. multiloculata C40
    `--Tetrataxis Ehrenberg 1854 (see below for synonymy) LT64
         |--*T. conica Ehrenberg 1854 [=*Artetraxoum conicum] LT64
         |--T. angusta CM01
         |--T. hemisphaerica PE02
         |--T. lata PE02
         |--T. palaeotrochus C40
         |--T. planolocula Lee & Chen 1930 [=*Pseudotetrataxis planolocula] LT64
         |--‘Lituola’ rhaetica [=Ruditaxis rhaetica] F71
         |--‘Valvulina’ rudis Brady 1876 [=*Ruditaxis rudis] C40
         `--T. scutella Cushman & Waters 1928 [=*Falsotetrataxis scutella] LT64

Tetrataxis Ehrenberg 1854 [=Artetraxoum Rhumbler 1913; incl. Falsotetrataxis Marie in Deleau & Marie 1961, Pseudotetrataxis Marie in Deleau & Marie 1961, Ruditaxis Schubert 1921] LT64

*Type species of generic name indicated


[CM01] Cózar, P., & B. L. Mamet. 2001. Planohowchinia (Lasiodiscidae, Foraminiferida), a new Late Viséan genus, southwestern Spain. Journal of Foraminiferal Research 31 (3): 228–232.

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

[F71] Fletcher, H. O. 1971. Catalogue of type specimens of fossils in the Australian Museum, Sydney. Australian Museum Memoir 13: 1–167.

[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.

[PE02] Pan, H.-Z., & D. H. Erwin. 2002. Gastropods from the Permian of Guangxi and Yunnan Provinces, south China. Journal of Paleontology 76 (Memoir 56): 1–49.

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