2 mm individual of Gromia oviformis, copyright Gary McDonald.

Belongs within: Cercozoa.

The Gromiidae are a group of amoeboid protists with an organic test (note that Loeblich & Tappan, 1964, included a number of taxa in Gromiidae that are no longer regarded as closely related to the type genus Gromia; it is possible that other genera listed below are similarly misplaced).

Characters (from Loeblich & Tappan 1964): Test membranous or pseudochitinous, rigid or slightly flexible, without distinct plates or scales, but with some siliceous elements, and commonly with foreign material.

Gromiidae (see below for synonymy)
    |--Micramphoraeopsis Sudzuki 1979 G86
    |    `--M. pinangensis Sudzuki 1979 G86
    |--Amoebogromia Giard 1900 LT64
    |    `--*A. cinnabarina Giard 1900 LT64
    |--Lagunculina Rhumbler 1904 (see below for synonymy) LT64
    |    `--*L. urnula (Gruber 1884) [=*Ovulina urnula, *Arlagunculum urnulum] LT64
    |--Urnulina Gruber 1884 [=Arurnulum Rhumbler 1913] LT64
    |    |--*U. difflugiaeformis Gruber 1884 [=*Arurnulum difflugiaeforme] LT64
    |    `--U. compressa C40
    `--Gromia Dujardin 1835 [incl. Arcellina DuPleiss 1876 non Carter 1856, Hyalopus Schaudinn 1894] LT64
         |--*G. oviformis Dujardin 1835 LT64
         |--G. dujardinii Schultze 1854 [=*Hyalopus dujardinii] LT64
         |--G. fluvialis Dujardin 1837 [=Allogromia fluvialis] LT64
         |--*Arcellina’ marina DuPleiss 1876 LT64
         `--G. sphaerica C-SCL15

Gromiidae [Gromiacea, Gromiada, Gromidae, Gromiida, Gromiidea, Gromiina, Gromiinae, Grominae, Nuditestiidae, Pseudogromiinae]

Lagunculina Rhumbler 1904 [=Arlagunculum Rhumbler 1913, Ovulina Gruber 1884 nec Ehrenberg 1845 nec Schultze 1854] LT64

*Type species of generic name indicated


[C-SCL15] Cavalier-Smith, T., E. E. Chao & R. Lewis. 2015. Multiple origins of Heliozoa from flagellate ancestors: new cryptist subphylum Corbihelia, superclass Corbistoma, and monophyly of Haptista, Cryptista, Hacrobia and Chromista. Molecular Phylogenetics and Evolution 93: 331–362.

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

[G86] Golemansky, V. G. 1986. Rhizopoda: Testacea. In: Botosaneanu, L. (ed.) Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) pp. 5–16. E. J. Brill/Dr. W. Backhuys: Leiden.

[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.

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