Paralectotypes of Iridia diaphana, copyright Natural History Museum London. Left scale bar = 516 µm; right scale bar = 564 µm.

Belongs within: Foraminifera.

The Lagynidae are a group of Foraminifera with membranous or pseudochitinous tests (Loeblich & Tappan 1964).

Characters (from Loeblich & Tappan 1964): Test small, membranous to pseudochitinous, may have ferruginous encrustations or rarely agglutinated matter; may form colonies; aperture single, or numerous apertures not localised; gametes (where known) biflagellate.

<==Lagynidae (see below for synonymy) LT64
    |--Marenda Nyholm 1951 G86
    |    `--*M. nematoides Nyholm 1951 LT64
    |--Schultzella Rhumbler 1904 (see below for synonymy) LT64
    |    `--*S. diffluens (Gruber 1884) (see below for synonymy) LT64
    |--Myxotheca Schaudinn 1893 [=Armyxothecum Rhumbler 1913] LT64
    |    `--*M. arenilega Schaudinn 1893 [=*Armyxothecum arenilegum] LT64
    |--Boderia Wright 1867 [=Arboderium Rhumbler 1913] LT64
    |    `--*B. turneri Wright 1867 [=*Arboderium turneri] LT64
    |--Apogromia De Saedeleer 1934 LT64
    |    `--*A. mucicola (Archer 1877) [=Microgromia mucicola, Mikrogromia mucicola] LT64
    |--Belaria De Saedeleer 1934 LT64
    |    `--*B. bicorpor De Saedeleer 1934 LT64
    |--Echinogromia Schröder 1907 [=Arechinogromium Rhumbler 1913] LT64
    |    `--*E. multifenestrata Schröder 1907 [=*Arechinogromium multifenestratum] LT64
    |--Heterogromia De Saedeleer 1934 LT64
    |    `--*H. intermedia De Saedeleer 1934 LT64
    |--Kibisidytes Jepps 1934 LT64
    |    `--*K. marinus Jepps 1934 LT64
    |--Microcometes Cienkowski 1876 LT64
    |    `--*M. paludosa Cienkowski 1876 LT64
    |--Nemogullmia Nyholm 1953 LT64
    |    `--*N. longevariabilis Nyholm 1953 LT64
    |--Ophiotuba Rhumbler 1894 [=Arophiotubum Rhumbler 1913] LT64
    |    `--*O. gelatinosa Rhumbler 1894 [=*Arophiotubum gelatinosum] LT64
    |--Pseudoditrema Deflandre in Grassé 1953 LT64
    |    `--*P. mikrous (De Saedeleer 1934) [=Ditrema mikrous] LT64
    |--Rhumblerinella Schmidt 1929 LT64
    |    `--*R. bacillifera Schmidt 1929 LT64
    |--Plagiophrys Claparède & Lachmann 1859 [=Arplagiophrum Rhumbler 1913] LT64
    |    |--*P. cylindrica Claparède & Lachmann 1859 [=*Arplagiophrum cylindricum] LT64
    |    `--P. parvipunctata Penard 1902 LT64
    |--Lagynis Schultze 1854 [=Exassula Ehrenberg 1872; incl. Platoum Schulze 1875] LT64
    |    |--*L. baltica Schultze 1854 [=Difflugia (*Exassula) baltica] LT64
    |    `--L. parva (Schulze 1875) [=*Platoum parvum] LT64
    |--Cystophrys Archer 1869 [incl. Mikrogromia Hertwig 1874, Microgromia Archer 1876] LT64
    |    |--*C. haeckeliana Archer 1869 (see below for synonymy) LT64
    |    `--C. oculea Archer 1869 LT64
    `--Iridia Heron-Allen & Earland 1914 LT64
         |--*I. diaphana Heron-Allen & Earland 1914 LT64
         `--I. lucida LT64

*Cystophrys haeckeliana Archer 1869 [incl. Gromia socialis Archer 1869, *Microgromia socialis, *Mikrogromia socialis] LT64

Lagynidae [Amphistominae, Amphistomini, Armyxothecnia, Belariini, Heterogromiini, Microcometesiidae, Microcometidae, Microgromiidae, Mikrogromiidae, Mikrogromiini, Myxothecinae, Plagiophryiinae, Polystomini] LT64

Schultzella Rhumbler 1904 [=Arschultzellum Rhumbler 1913, Schultzia Gruber 1888 nec Grimm 1876 nec Graff 1882] LT64

*Schultzella diffluens (Gruber 1884) [=Lieberkuehnia diffluens, *Arschultzellum diffluens, *Schultzia diffluens] LT64

*Type species of generic name indicated


[G86] Golemansky, V. G. 1986. Rhizopoda: Foraminiferida. In: Botosaneanu, L. (ed.) Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) pp. 17–20. 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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