Archaediscidae

Thin section of Archaediscus, from BouDagher-Fadel (2008).

Belongs within: Spirillinana.

The Archaediscidae are a group of fusulinid Foraminifera known from the Lower Carboniferous to the Permian. The test is streptospirally coiled in early stages in the genus Archaediscus, becoming nearly planispiral in later stages. Other genera are planispirally coiled for the greater part of (Brunsia) or throughout (Permodiscus) the test (Loeblich & Tappan 1964a).

Characters (from Loeblich & Tappan 1964a): Proloculus followed by tubular second chamber, involute in early stage, later streptospirally or planispirally coiled; outer wall layer of radial calcite, inner layer finely granular; aperture at end of spiral chamber.

<==Archaediscidae
    |--Donodiscus Vdovenko 1988 [Ammarchaediscinae]M13
    |--KasachstanodiscinaeM13
    |--EosigmoilininaeM13
    |    |--Brenckleina Zaninetti & Altiner 1979M13
    |    `--Eosigmoilina Ganelin 1956M13
    |         `--*E. explicata Ganelina in Kiparisova et al. 1956LT64a
    `--Archaediscus Brady 1873W76 (see below for synonymy)
         |--*A. karreri Brady 1873 [=*Archaediscoum karreri]LT64a
         |--A. akchimensis Grozdilova & Lebedeva 1954 [=*Rugosoarchaediscus akchimensis]LT64a
         |--A. chernoussovensisCM01
         |--A. convexusCM01
         |--A. dubitabilis (Orlova 1955) [=*Paraarchaediscus dubitabilis]LT64a
         |--A. koktjubensisCM01
         |--A. krestovnikoviCM01
         |--A. latispiralisR79
         |--A. mellitusZP86
         |--A. moelleriCM01
         |--A. pseudomoelleriCM01
         `--A. ulmeri (Mikhaylov 1939) [=Hemigordius ulmeri, *Propermodiscus ulmeri]LT64a
Archaediscidae incertae sedis:
  Angulodiscus Kristan 1957W76
    `--*A. communis Kristan 1957 [=Aulotortus communis]LT64b
  Multidiscus Miklukho-Maclay 1953W76
    |--*M. padangensis (Lange 1925) [=Nummulostegina padangensis, Permodiscus padangensis]LT64a
    `--M. semiconcavus Wang 1976W76
  Agathammina Neumayr 1887W76
    |--*A. pusilla (Geinitz in Geinitz & Gutbier 1848) [=Serpula pusilla]LT64a
    `--A. ovata Wang 1976W76
  Nudarchaediscus Conil & Pirlet 1974HW93
  Neoarchaediscus Miklukho-Maklay 1956HW93
    `--*N. incertus (Grozdilova & Lebedeva 1954) [=Archaediscus incertus, Brunsia incerta]LT64a
  Nodasperodiscus Conil & Pirlet 1974HW93
  Nodosarchaediscus Conil & Pirlet 1974HW93
    |--N. demanetiCM01
    `--N. saleeiCM01

Archaediscus Brady 1873W76 [=Archaediscoum Rhumbler 1913LT64a; incl. Paraarchaediscus Orlova 1955LT64a, Propermodiscus Miklukho-Maklay 1953LT64a, Rugosoarchaediscus Miklukho-Maklay 1957LT64a; ArchaediscinaeM13]

*Type species of generic name indicated

References

[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.

[HW93] Hart, M. B., & C. L. Williams. 1993. Protozoa. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 43–70. Chapman & Hall: London.

[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.

[R79] Ross, C. A. 1979. Carboniferous. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A254–A290. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[W76] Wang K. 1976. The foraminifera from the Changhsing Formation in western Guizhou. Acta Palaeontologica Sinica 15 (2): 187–195.

[ZP86] Zhang, R., & J. Pojeta Jr. 1986. New bivalves from the Datang Stage, Lower Carboniferous, Guangdong Province, China. Journal of Paleontology 60 (3): 669–679.

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