Rosalina villardeboana, from Brady (1884).

Belongs within: Rotaliida.

The Discorbidae are a group of trochospiral foraminifera known from the Middle Triassic to the present. They are divided between the Discorbinae, in which the umbilical area is open, and the Baggininae, in which the umbilical area is closed with a clear, thin imperforate area next to the umbilicus. Within Baggininae, the genus Baggina is somewhat involute on the spiral side and has an open aperture without a lip. Cancris is more elongate, with a peripheral keel, evolute on the spiral side and has an open umbilicus and apertural lip (Loeblich & Tappan 1964b).

Characters (from Loeblich & Tappan 1964b): Test free, trochospiral; chambers simple; wall calcareous, perforate, radial in structure, monolamellid; aperture basal or areal.

<==Discorbidae [Discorbinae]
    |--Discorbis Lamarck 1804G86 (see below for synonymy)
    |    |--*D. vesicularis (Lamarck 1804) [=*Discorbites vesicularis, *Cyclodiscus vesicularis, Discorbina vesicularis]LT64b
    |    |--D. berthelotiM62 [=Discorbina berthelotiB64]
    |    |--D. colliculus (Bandy 1944) [=*Rotorbinella colliculus]LT64b
    |    |--‘Discorbina’ cymbaloporoides Chapman 1909F71
    |    |--D. dimidiatus (Jones & Parker 1862)A68
    |    |--D. finlayi [=Rotorbinella finlayi]LT64b
    |    |--D. floridanaLT64a
    |    |--*Phanerostomum’ integerrimum Ehrenberg 1843 (n. d.)LT64b
    |    |--*Aristerospira’ isoderma Ehrenberg 1858LT64b
    |    |--D. mamillaM62
    |    |--D. mediterranensisM62
    |    |--*Allotheca’ megathyra Ehrenberg 1843LT64b
    |    |--D. nitidaC40
    |    |--D. orbicularisM62
    |    |--D. patelliferaT72
    |    |--D. rosaceaC40
    |    |--‘Rotorbinella’ rosea (d’Orbigny 1826)S05
    |    |--*Platyoecus’ squama Ehrenberg 1854 (n. d.)LT64b
    |    |--D. subterranea Mikhalevich 1976G86
    |    `--D. turgidusB49
    |--Aboudaragina Nakkady 1955LT64b
    |    `--*A. eponidelliformis Nakkady 1955LT64b
    |--Discorbitura Bandy 1949LT64b
    |    `--*D. dignata Bandy 1949LT64b
    |--Eurycheilostoma Loeblich & Tappan 1957LT64b
    |    `--*E. altispira Loeblich & Tappan 1957LT64b
    |--Planodiscorbis Bermúdez 1952LT64b
    |    `--*P. rarescens (Brady 1884) [=Discorbina rarescens]LT64b
    |--Pseudopatellinella Takayanagi 1960LT64b
    |    `--*P. cretacea Takayanagi 1960LT64b
    |--Vernonina Puri 1957LT64b
    |    `--*V. tuberculata Puri 1957LT64b
    |--Earlmyersia Rhumbler 1938LT64b
    |    |--*E. ‘punctulata’ Rhumbler 1938 (see below for synonymy)HR92
    |    `--E. punctulata (d’Orbigny 1826)LT64b (see below for synonymy)
    |--Laticarinina Galloway & Wissler 1927 (see below for synonymy)LT64b
    |    |--*L. pauperata (Parker & Jones 1865) (see below for synonymy)LT64b
    |    `--L. altocamerata (Heron-Allen & Earland 1922) (see below for synonymy)LT64b
    |--Neoconorbina Hofker 1951LT64b
    |    |--N. terquemi (Rzehak 1888) (see below for synonymy)LT64b
    |    `--N. pacificaLT64b
    |--Pijpersia Thalmann 1954 [=Bonairea Pijpers 1933 non Burrington Baker 1924, Ruttenia Pijpers 1933 non Rodhain 1924]LT64b
    |    `--*P. coronaeformis (Pijpers 1933) [=*Bonairea coronaeformis, *Ruttenia coronaeformis]LT64b
    |--Tretomphalus Möbius 1880LT64b
    |    |--*T. bulloides (d’Orbigny 1839)HR92 [=Rosalina bulloidesHR92, Cymbalopora bulloidesC40]
    |    `--T. myersiLT64b
    `--Acarotrochus Kawagata, Yamasaki & Jordan 2005M13

Discorbis Lamarck 1804G86 [=Cyclodiscus Ehrenberg 1839LT64b, Discorbites Lamarck 1804LT64b, Discorbitus Rafinesque 1815LT64b; incl. Allotheca Ehrenberg 1843C40, Aristerospira Ehrenberg 1858C40, Phanerostomum Ehrenberg 1843C40, Platyoecus Ehrenberg 1854C40, Rotorbinella Bandy 1944LT64b; Discorbinae]

Earlmyersia punctulata (d’Orbigny 1826)LT64b [=Rotalia punctulataLT64b, Discorbina punctulataHR92, Ea. pustulata (l. c.)C94, Eponides punctulataC94, Ep. punctulatusC94, Pulvinulina repanda var. punctulataLT64b, C94, P. repanda var. punctatula (l. c.)C94, P. pustulata (l. c.)C94, Rotalia punctatula (l. c.)C94, Rotalina punctulataC94]

*Earlmyersia ‘punctulata’ Rhumbler 1938 non Rotalia punctulata d’Orbigny 1826 [=E. punctulata f. liliputana Rhumbler 1938 (nom. inv.)]HR92

Laticarinina Galloway & Wissler 1927 [=Carinina Galloway & Wissler 1927 non Hubrecht 1887; incl. Parvicarinina Finlay 1940]LT64b

Laticarinina altocamerata (Heron-Allen & Earland 1922) [=Truncatulina tenuimargo var. altocamerata, T. tenuimargo var. alatocamerata (l. c.), *Parvicarinina altocamerata, P. alatocamerata (l. c.)]LT64b

*Laticarinina pauperata (Parker & Jones 1865) [=Pulvinulina repanda var. menardii subvar. pauperata, *Carinina pauperata]LT64b

Neoconorbina terquemi (Rzehak 1888) [=Discorbina terquemi; incl. Rosalina orbicularis Terquem 1876 non d’Orbigny 1850, *Neoconorbina orbicularis]LT64b

*Type species of generic name indicated


[A68] Albani, A. D. 1968. Recent Foraminiferida of the central coast of New South Wales. AMSA Handbook 1: 1–37.

[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.

[B64] Brady, H. B. 1864. Notes on Foraminifera new to the British fauna. Report of the British Association for the Advancement of Science 33 (Notices and Abstracts): 100–101.

[C94] Cedhagen, T. 1994. Taxonomy and biology of Hyrrokkin sarcophaga gen. et sp. n., a parasitic foraminiferan (Rosalinidae). Sarsia 79: 65–82.

[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.

[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.

[HR92] Hansen, H. J., & S. A. Revets. 1992. A revision and reclassification of the Discorbidae, Rosalinidae, and Rotaliidae. Journal of Foraminiferal Research 22 (2): 166–180.

[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.

[M13] Mikhalevich, V. I. 2013. New insight into the systematics and evolution of the Foraminifera. Micropaleontology 59 (6): 493–527.

[M62] Monniot, F. 1962. Recherches sur les graviers a Amphioxus de la région de Banyuls-sur-Mer. Vie et Milieu 13: 231–322.

[S05] Semeniuk, T. A. 2005. Fossil foraminiferal assemblages from Pleistocene seagrass-bank deposits of the southern Perth Basin, Western Australia, and their palaeotemperature implications. Journal of the Royal Society of Western Australia 88 (4): 177–190.

[T72] Tendal, O. S. 1972. A monograph of the Xenophyophoria (Rhizopodea, Protozoa). Galathea Report 12: 7–99.

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