Spiroloculina

Spiroloculina excavata, copyright Bernard Remaud.

Belongs within: Miliolina.

Spiroloculina is a genus of porcelaneous Foraminifera known from the Upper Cretaceous to the present that is planispiral throughout development (Loeblich & Tappan 1964).

Characters (from Loeblich & Tappan 1964): Test free, commonly with flattened sides and lanceolate or fusiform outline, earliest stage may consist of single chamber completely encircling proloculus, later chambers (or all chambers in megalospheric forms) being added two to whorl on alternate sides and in single plane; wall calcareous, porcelaneous; aperture at open end of final chamber, with simple or bifid tooth.

Spiroloculina d’Orbigny 1826S-VC91 [=Spiroculina (l. c.)LT64, Spirolocunina (l. c.)LT64; incl. Flintia Schubert 1911LT64]
|--*S. depressa d’Orbigny 1826LT64
|--S. antillarum d’Orbigny 1839A68
|--S. canaliculata d’Orbigny 1846A68
|--S. communis Cushman & Todd 1944A68
|--S. corrugataS05
|--S. excavataM62
|--S. lucida Cushman & Todd 1944A68
|--S. nitidaH04
|--S. parvulaS05
|--S. planulata (Lamarck 1805)S-VC91
|--S. robusta Brady 1884 [=*Flintia robusta]LT64
|--S. rostrataM62
|--S. tenuissimaJW99
|--S. turkomanica Brodsky 1928G86
`--S. venustaS05

*Type species of generic name indicated

References

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

[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.

[H04] Haeckel, E. 1899–1904. Kunstformen der Natur. Bibliographisches Institut: Leipzig und Wien.

[JW99] Jian, Z.-M., L.-J. Wang, M. Kienast, M. Sarnthein, W. Kuhnt, H.-L. Lin & P.-X. Wang. 1999. Benthic foraminiferal paleoceanography of the South China Sea over the last 40,000 years. Marine Geology 156: 159–186.

[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.

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

[S-VC91] Segura-Vernis, L. R., & A. L. Carreño. 1991. Foraminíferos y ostrácodos de la Laguna de La Paz, Baja California Sur, México. Inv. Mar. CICIMAR 6 (1): 195–224.

[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.

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