Soritinae

Sorites orbiculus, copyright Jan Steger.

Belongs within: Soritidae.

The Soritinae are a group of porcellaneous Foraminifera known from the Eocene to the present, characterised by a distinct pattern of chamber addition (Loeblich & Tappan 1964).

Characters (from Loeblich & Tappan 1964): Growth occurs by addition of numerous small chambers in arcuate or annular series, without intercommunications between those of single series, apertures connect adjacent chambers of successive series.

Soritinae [Orbitolitidinae, Orbitolitinae]
    |  i. s.: Orbitolites Lamarck 1801 (see below for synonymy) LT64
    |           `--*O. complanata Lamarck 1801 (see below for synonymy) LT64
    |         Opertorbitolites Nuttall 1925 LT64
    |           `--*O. douvillei Nuttall 1925 LT64
    |         Somalina Silvestri 1939 LT64
    |           `--*S. stefaninii Silvestri 1939 LT64
    |         Yaberinella Vaughan 1928 LT64
    |           `--*Y. jamaicensis Vaughan 1928 LT64
    |--+--Amphisorus Ehrenberg 1839 PHT13, LT64 [incl. Bradyella Munier-Chalmas 1902 LT64]
    |  |    `--*A. hemprichii Ehrenberg 1839 [incl. Orbitolites duplex Carpenter 1883, *Bradyella duplex] LT64
    |  `--Marginopora Quoy & Gaimard in de Blainville 1830 PHT13, LT64
    |       `--*M. vertebralis Quoy & Gaimard in de Blainville 1830 [incl. Orbitolites complanata laciniata] LT64
    `--Sorites Ehrenberg 1839 PHT13, LT64 [=Taramellina Munier-Chalmas 1902 LT64]
         |--S. marginalis (Lamarck 1816) (see below for synonymy) LT64
         |--S. duplex C40
         |--S. orbiculus C-SC03
         `--S. variabilis S05

Orbitolites Lamarck 1801 [=Discolithus Fortis 1802, Orbitolithes Oken 1815, Orbitulites Bronn in Bronn & Roemer 1854 nec Berthold 1827 nec Eichwald 1829 nec Griffith & Pidgeon 1834; incl. Discolites de Montfort 1808] LT64

*Orbitolites complanata Lamarck 1801 [=*Discolithus complanatus, *Orbitulites complanatus; incl. *Discolites concentricus de Montfort 1808] LT64

Sorites marginalis (Lamarck 1816) [=Orbulites marginalis, Orbitolites marginatis; incl. *S. dominicensis Ehrenberg 1839, *Taramellina dominicensis] LT64

*Type species of generic name indicated

REFERENCES

[C-SC03] Cavalier-Smith, T., & E. E.-Y. Chao. 2003. Phylogeny and classification of phylum Cercozoa. Protist 154: 341–358.

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

[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.

[PHT13] Pawlowski, J., M. Holzmann & J. Tyszka. 2013. New supraordinal classification of Foraminifera: molecules meet morphology. Marine Micropalaeontology 100: 1–10.

[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.